--- title: "Changes to Retrieve Message Batch results" method: GET path: "/v1/messages/batches/{message_batch_id}/results?beta=true" --- # Changes to Retrieve Message Batch results `GET /v1/messages/batches/{message_batch_id}/results?beta=true` > Every recorded change to this operation, newest first. ## Timeline Changed in 46 of 287 revisions. - **2026-11-09** `9b8a60482a33`: 14 info - **2026-11-09** `3fc8060329f5`: 14 info - **2026-11-09** `d53195e9d075`: 7 info - **2026-11-05** `037a593978dc`: 1 info - **2026-10-23** `f538a797852c`: 1 info - **2026-10-23** `8071e43a8476`: 1 info - **2026-10-22** `376dea998624`: 1 info - **2026-10-21** `94c83daca660`: 1 warning - **2026-10-21** `b6f3fef9c0b5`: 1 info - **2026-10-14** `e6a88013f0b2`: 1 info - **2026-10-09** `ee978b5e1294`: 14 info - **2026-10-08** `5b6f4c063051`: 1 breaking, 5 info - **2026-10-07** `2705c258c5dc`: 7 info - **2026-09-30** `d721a6487a16`: 15 info - **2026-09-30** `ab91b3e513b5`: 1 info - **2026-09-28** `3cd29369f196`: 14 info - **2026-09-28** `86153a702615`: 12 info - **2026-09-22** `257523f5aeb5`: 1 breaking, 10 info - **2026-09-18** `3144b1e8c9e4`: 1 breaking, 1 warning - **2026-09-15** `54c20b5c11d2`: 1 info - **2026-09-15** `51c9c4c43eed`: 5 breaking, 1 info - **2026-09-15** `c560232ddcd5`: 2 info - **2026-09-10** `e46a40fc336b`: 1 warning - **2026-09-04** `e2857e722bed`: 2 breaking - **2026-09-04** `4789294140a2`: 17 info - **2026-09-01** `d1d189d791d1`: 7 info - **2026-08-19** `67ee007cda1c`: 1 info - **2026-08-07** `538e9bd0db77`: 6 info - **2026-07-24** `a97790bd7f18`: 13 info - **2026-07-21** `97200025c28e`: 2 warning - **2026-07-01** `9c991bee394d`: 2 info - **2026-06-30** `7caa9a75ddbc`: 6 info - **2026-06-24** `82c21eb736c8`: 2 warning - **2026-06-18** `063bcb9d6cf9`: 7 info - **2026-06-09** `996eb28b2ab6`: 1 warning - **2026-06-09** `00259327305f`: 2 breaking, 1 warning, 10 info - **2026-06-06** `546c704d347b`: 1 warning, 4 info - **2026-05-28** `f9d488f9290d`: 1 warning, 5 info - **2026-05-13** `400ce646c6b2`: 1 info - **2026-04-16** `e0696f59ae07`: 5 info - **2026-04-09** `d87d3ef6f636`: 2 breaking, 1 warning, 2 info - **2026-04-08** `69486316563e`: 2 info - **2026-04-01** `efe26b096126`: 1 info - **2026-03-16** `7fce94a3c9f7`: 1 breaking, 4 info - **2026-02-17** `53a0f3638030`: 2 breaking, 6 info - **2026-02-07** `fee5dc365a49`: 1 info ## Changes - **2026-11-09** `9b8a60482a33`: 14 info - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - **2026-11-09** `3fc8060329f5`: 14 info - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - **2026-11-09** `d53195e9d075`: 7 info - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - **2026-11-05** `037a593978dc`: 1 info - added the enum value `admin-user-sign-out-2026-10-08` to the property `items/anyOf[subschema #2]/` of the `header` request parameter `anthropic-beta` - **2026-10-23** `f538a797852c`: 1 info - added the enum value `experimental-claude-tag-2026-10-21` to the property `items/anyOf[subschema #2]/` of the `header` request parameter `anthropic-beta` - **2026-10-23** `8071e43a8476`: 1 info - added the enum value `analytics-usage-cost-2026-08-24` to the property `items/anyOf[subschema #2]/` of the `header` request parameter `anthropic-beta` - **2026-10-22** `376dea998624`: 1 info - added the enum value `message-threads-2026-08-12` to the property `items/anyOf[subschema #2]/` of the `header` request parameter `anthropic-beta` - **2026-10-21** `94c83daca660`: 1 warning - deleted the `header` request parameter `x-api-key` - **2026-10-21** `b6f3fef9c0b5`: 1 info - added the enum value `webhooks-2026-10-07` to the property `items/anyOf[subschema #2]/` of the `header` request parameter `anthropic-beta` - **2026-10-14** `e6a88013f0b2`: 1 info - added the enum value `telemetry-destinations-2026-08-11` to the property `items/anyOf[subschema #2]/` of the `header` request parameter `anthropic-beta` - **2026-10-09** `ee978b5e1294`: 14 info - added `subschema #15, subschema #16` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - added `subschema #15, subschema #16` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - added `subschema #15, subschema #16` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - added `subschema #15, subschema #16` to the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - added `subschema #15, subschema #16` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - added `subschema #15, subschema #16` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #15, subschema #16` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #15, subschema #16` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - removed `subschema #15, subschema #16` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - removed `subschema #15, subschema #16` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - removed `subschema #15, subschema #16` from the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - removed `subschema #15, subschema #16` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - removed `subschema #15, subschema #16` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #15, subschema #16` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - **2026-10-08** `5b6f4c063051`: 1 breaking, 5 info - the `error` response's property type changed from no type to `object` for status `400` - added the optional property `error/details` to the response with the `400` status - removed discriminator from `error` response property for the response status `400` - removed `#/components/schemas/BetaInvalidRequestError, #/components/schemas/BetaAuthenticationError, #/components/schemas/BetaBillingError, #/components/schemas/BetaPermissionError, #/components/schemas/BetaNotFoundError, #/components/schemas/BetaRateLimitError, #/components/schemas/BetaGatewayTimeoutError, #/components/schemas/BetaAPIError, #/components/schemas/BetaOverloadedError` from the `error` response property `oneOf` list for the response status `400` - added the required property `error/message` to the response with the `400` status - added the required property `error/type` to the response with the `400` status - **2026-10-07** `2705c258c5dc`: 7 info - added `subschema #1` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - added `subschema #1` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - added `subschema #1` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - added `subschema #1` to the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - added `subschema #1` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - added `subschema #1` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #1` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - **2026-09-30** `d721a6487a16`: 15 info - added the enum value `spend-limit-reads-2026-09-26` to the property `items/anyOf[subschema #2]/` of the `header` request parameter `anthropic-beta` - added `subschema #18, subschema #19` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - added `subschema #18, subschema #19` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - added `subschema #18, subschema #19` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - added `subschema #18, subschema #19` to the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - added `subschema #18, subschema #19` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - added `subschema #18, subschema #19` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #18, subschema #19` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #18, subschema #19` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - removed `subschema #18, subschema #19` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - removed `subschema #18, subschema #19` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - removed `subschema #18, subschema #19` from the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - removed `subschema #18, subschema #19` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - removed `subschema #18, subschema #19` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #18, subschema #19` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - **2026-09-30** `ab91b3e513b5`: 1 info - added the enum value `ce-plugins-2026-09-01` to the property `items/anyOf[subschema #2]/` of the `header` request parameter `anthropic-beta` - **2026-09-28** `3cd29369f196`: 14 info - added `subschema #1, subschema #5` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #5` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #5` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #5` to the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #5` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #5` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #5` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #4` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: ResponseToolAdditionBlock]/tool/oneOf[subschema #4: ResponseToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model` response property `anyOf` list for the response status `200` - removed `subschema #4` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - removed `subschema #4` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - removed `subschema #4` from the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - removed `subschema #4` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - removed `subschema #4` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #4` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - **2026-09-28** `86153a702615`: 12 info - added `subschema #1, subschema #2, subschema #3, subschema #4, subschema #5` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/trigger/category/anyOf[subschema #1: RefusalCategory]/` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2, subschema #3, subschema #4, subschema #5` to the `result/oneOf[subschema #1: SucceededResult]/message/stop_details/anyOf[subschema #1: RefusalStopDetails]/category/anyOf[subschema #1: RefusalCategory]/` response property `anyOf` list for the response status `200` - removed the `bio` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/trigger/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - removed the `bio` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/stop_details/anyOf[subschema #1: RefusalStopDetails]/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - removed the `cyber` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/trigger/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - removed the `cyber` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/stop_details/anyOf[subschema #1: RefusalStopDetails]/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - removed the `frontier_llm` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/trigger/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - removed the `frontier_llm` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/stop_details/anyOf[subschema #1: RefusalStopDetails]/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - removed the `general_harms` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/trigger/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - removed the `general_harms` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/stop_details/anyOf[subschema #1: RefusalStopDetails]/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - removed the `reasoning_extraction` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/trigger/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - removed the `reasoning_extraction` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/stop_details/anyOf[subschema #1: RefusalStopDetails]/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - **2026-09-22** `257523f5aeb5`: 1 breaking, 10 info - added `#/components/schemas/BetaResponseMCPToolListingBlock` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/` response property `oneOf` list for the response status `200` - added the enum value `inline-tools-2026-09-15` to the property `items/anyOf[subschema #2]/` of the `header` request parameter `anthropic-beta` - added the enum value `mcp-client-2026-09-15` to the property `items/anyOf[subschema #2]/` of the `header` request parameter `anthropic-beta` - added the optional property `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/tool_changes` to the response with the `200` status - added `subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - added `subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - added `subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - added `subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model/anyOf[subschema #1: Model]/` response property `anyOf` list for the response status `200` - added `subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `mcp_tool_listing` discriminator mapping keys to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/` response property for the response status `200` - **2026-09-18** `3144b1e8c9e4`: 1 breaking, 1 warning - for the `header` request parameter `anthropic-beta`, the type changed from `string` to `array` - for the `header` request parameter `anthropic-beta`, the type of property `items/` changed from `string` to no type - **2026-09-15** `54c20b5c11d2`: 1 info - added the optional property `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #16: ResponseCompactionBlock]/signature` to the response with the `200` status - **2026-09-15** `51c9c4c43eed`: 5 breaking, 1 info - added `#/components/schemas/BetaThinkingDroppedInputTransformation, #/components/schemas/BetaThinkingMismatchAllowedInputTransformation` to the `result/oneOf[subschema #1: SucceededResult]/message/input_transformations/anyOf[subschema #1]/items/` response property `oneOf` list for the response status `200` - the `result/oneOf[subschema #1: SucceededResult]/message/input_transformations/anyOf[subschema #1]/items/` response's property type changed from `object` to no type for status `200` - removed the required property `result/oneOf[subschema #1: SucceededResult]/message/input_transformations/anyOf[subschema #1]/items/path` from the response with the `200` status - removed the required property `result/oneOf[subschema #1: SucceededResult]/message/input_transformations/anyOf[subschema #1]/items/reason` from the response with the `200` status - removed the required property `result/oneOf[subschema #1: SucceededResult]/message/input_transformations/anyOf[subschema #1]/items/type` from the response with the `200` status - added discriminator to `result/oneOf[subschema #1: SucceededResult]/message/input_transformations/anyOf[subschema #1]/items/` response property for the response status `200` - **2026-09-15** `c560232ddcd5`: 2 info - added `#/components/schemas/Model, subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #1, subschema #2, subschema #3, subschema #4, subschema #5, subschema #6, subschema #7, subschema #8, subschema #9, subschema #10, subschema #11, subschema #12, subschema #13, subschema #14, subschema #15, subschema #16, subschema #17, subschema #18` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model` response property `anyOf` list for the response status `200` - **2026-09-10** `e46a40fc336b`: 1 warning - added the new `content_too_large` enum value to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #7: ResponseWebFetchToolResultBlock]/content/anyOf[subschema #1: ResponseWebFetchToolResultError]/error_code` response property for the response status `200` - **2026-09-04** `e2857e722bed`: 2 breaking - the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #14: ResponseMCPToolResultBlock]/content/anyOf[subschema #2: beta_mcp_tool_result_block_content]/items/text` response property's maxLength was unset from `5000000` for the response status `200` - the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #1: ResponseTextBlock]/text` response property's maxLength was unset from `5000000` for the response status `200` - **2026-09-04** `4789294140a2`: 17 info - added the new optional `header` request parameter `anthropic-workspace-id` - added the non-success response with the status `400` - added the non-success response with the status `401` - added the non-success response with the status `403` - added the non-success response with the status `404` - added the non-success response with the status `408` - added the non-success response with the status `409` - added the non-success response with the status `412` - added the non-success response with the status `413` - added the non-success response with the status `429` - added the non-success response with the status `431` - added the non-success response with the status `499` - added the non-success response with the status `500` - added the non-success response with the status `501` - added the non-success response with the status `503` - added the non-success response with the status `504` - added the non-success response with the status `529` - **2026-09-01** `d1d189d791d1`: 7 info - added the optional property `result/oneOf[subschema #1: SucceededResult]/message/input_transformations` to the response with the `200` status - added `subschema #2, subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - added `subschema #2, subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - added `subschema #2, subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - added `subschema #2, subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #2, subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #2, subschema #3` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - **2026-08-19** `67ee007cda1c`: 1 info - added the optional property `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #4: ResponseToolUseBlock]/toolset_name` to the response with the `200` status - **2026-08-07** `538e9bd0db77`: 6 info - removed `subschema #17, subschema #18` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - removed `subschema #17, subschema #18` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - removed `subschema #17, subschema #18` from the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - removed `subschema #17, subschema #18` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #17, subschema #18` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #17, subschema #18` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - **2026-07-24** `a97790bd7f18`: 13 info - added `subschema #5, subschema #6, subschema #7, subschema #9, subschema #13, subschema #14, subschema #17, subschema #18` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - added `subschema #5, subschema #6, subschema #7, subschema #9, subschema #13, subschema #14, subschema #17, subschema #18` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - added `subschema #5, subschema #6, subschema #7, subschema #9, subschema #13, subschema #14, subschema #17, subschema #18` to the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - added `subschema #5, subschema #6, subschema #7, subschema #9, subschema #13, subschema #14, subschema #17, subschema #18` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #5, subschema #6, subschema #7, subschema #9, subschema #13, subschema #14, subschema #17, subschema #18` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #5, subschema #6, subschema #7, subschema #9, subschema #13, subschema #14, subschema #17, subschema #18` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #5, subschema #6, subschema #8, subschema #12, subschema #13, subschema #16, subschema #17` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - removed `subschema #5, subschema #6, subschema #8, subschema #12, subschema #13, subschema #16, subschema #17` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - removed `subschema #5, subschema #6, subschema #8, subschema #12, subschema #13, subschema #16, subschema #17` from the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - removed `subschema #5, subschema #6, subschema #8, subschema #12, subschema #13, subschema #16, subschema #17` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #5, subschema #6, subschema #8, subschema #12, subschema #13, subschema #16, subschema #17` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #5, subschema #6, subschema #8, subschema #12, subschema #13, subschema #16, subschema #17` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added the required property `result/oneOf[subschema #1: SucceededResult]/message/usage/fallback_credit` to the response with the `200` status - **2026-07-21** `97200025c28e`: 2 warning - added the new `general_harms` enum value to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/trigger/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - added the new `general_harms` enum value to the `result/oneOf[subschema #1: SucceededResult]/message/stop_details/anyOf[subschema #1: RefusalStopDetails]/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - **2026-07-01** `9c991bee394d`: 2 info - removed the `military_weapons` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/trigger/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - removed the `military_weapons` enum value from the `result/oneOf[subschema #1: SucceededResult]/message/stop_details/anyOf[subschema #1: RefusalStopDetails]/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - **2026-06-30** `7caa9a75ddbc`: 6 info - added `subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - added `subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - added `subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - added `subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added `subschema #2` to the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - **2026-06-24** `82c21eb736c8`: 2 warning - added the new `military_weapons` enum value to the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/trigger/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - added the new `military_weapons` enum value to the `result/oneOf[subschema #1: SucceededResult]/message/stop_details/anyOf[subschema #1: RefusalStopDetails]/category/anyOf[subschema #1: RefusalCategory]/` response property for the response status `200` - **2026-06-18** `063bcb9d6cf9`: 7 info - removed `subschema #17, subschema #18, subschema #19, subschema #20, subschema #21` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/from/model` response property `anyOf` list for the response status `200` - removed `subschema #17, subschema #18, subschema #19, subschema #20, subschema #21` from the `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/to/model` response property `anyOf` list for the response status `200` - removed `subschema #17, subschema #18, subschema #19, subschema #20, subschema #21` from the `result/oneOf[subschema #1: SucceededResult]/message/model` response property `anyOf` list for the response status `200` - removed `subschema #17, subschema #18, subschema #19, subschema #20, subschema #21` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #1: MessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #17, subschema #18, subschema #19, subschema #20, subschema #21` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #3: AdvisorMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - removed `subschema #17, subschema #18, subschema #19, subschema #20, subschema #21` from the `result/oneOf[subschema #1: SucceededResult]/message/usage/iterations/anyOf[subschema #1]/items/oneOf[subschema #4: FallbackMessageIterationUsage]/model` response property `anyOf` list for the response status `200` - added the required property `result/oneOf[subschema #1: SucceededResult]/message/content/items/oneOf[subschema #17: ResponseFallbackBlock]/trigger` to the response with the `200` status - **2026-06-09** `996eb28b2ab6`: 1 warning - added the new `frontier_llm` enum value to the `result/oneOf[subschema #1: SucceededResult]/message/stop_details/anyOf[subschema #1: RefusalStopDetails]/category/anyOf[subschema #1]/` response property for the response status `200` - …earlier changes are on the page: https://skmtc.dev/anthropics/apis/anthropic-api/changes/v1/messages/batches/:message_batch_id/results%3Fbeta=true/get --- [Operation](https://skmtc.dev/anthropics/apis/anthropic-api/docs/v1/messages/batches/:message_batch_id/results%3Fbeta=true/get.md) - [API](https://skmtc.dev/anthropics/apis/anthropic-api.md) - [Page](https://skmtc.dev/anthropics/apis/anthropic-api/changes/v1/messages/batches/:message_batch_id/results%3Fbeta=true/get)