--- title: "Changes to Get chat completion" method: GET path: "/chat/completions/{completion_id}" --- # Changes to Get chat completion `GET /chat/completions/{completion_id}` > Every recorded change to this operation, newest first. ## Timeline Changed in 20 of 397 revisions. - **2026-10-06** `e2f8d8cbc41f`: 3 info - **2026-10-01** `d6ffb47152e5`: 3 breaking, 1 info - **2026-09-28** `8a023ac59f86`: 1 breaking, 2 info - **2026-09-28** `baee5b6ef947`: 3 breaking, 1 info - **2026-09-25** `8166b0205067`: 3 info - **2026-09-08** `bb9b3b410112`: 4 info - **2026-09-01** `ca86486f9fef`: 1 warning - **2026-08-27** `60c5936f2a2f`: 1 info - **2026-08-14** `9080adae100c`: 1 info - **2026-08-14** `fe3335711e48`: 3 info - **2026-08-05** `ab0c5306e390`: 1 warning, 2 info - **2026-07-30** `26e845904dd2`: 1 warning - **2026-07-30** `39027dbff247`: 1 warning - **2026-07-15** `4065aec90c5d`: 2 info - **2026-07-09** `e0508a503b84`: 1 info - **2026-06-03** `60433c6df861`: 1 info - **2026-05-13** `74cbcf73838f`: 16 breaking, 8 info - **2026-04-10** `7c540cce6eb3`: 15 breaking, 9 info - **2025-04-29** `6a6c681b1820`: 2 warning, 2 info - **2025-03-11** `6ab43fe7798e`: 1 info ## Changes - **2026-10-06** `e2f8d8cbc41f`: 3 info - added the optional property `error/misalignment/review_target` to the response with the `404` status - added the optional property `error/misalignment/review_target` to the response with the `429` status - added the optional property `error/misalignment/review_target` to the response with the `500` status - **2026-10-01** `d6ffb47152e5`: 3 breaking, 1 info - the response property `choices/items/message/function_call` became nullable for the status `200` - the response property `choices/items/message/refusal` became optional for the status `200` - the `choices/items/message/tool_calls` response's property type changed from `array` to no type for status `200` - added `#/components/schemas/ChatCompletionMessageToolCalls, subschema #2` to the `choices/items/message/tool_calls` response property `anyOf` list for the response status `200` - **2026-09-28** `8a023ac59f86`: 1 breaking, 2 info - the `choices/items/message/tool_calls` response's property type changed from no type to `array` for status `200` - removed `#/components/schemas/ChatCompletionMessageToolCalls, subschema #2` from the `choices/items/message/tool_calls` response property `anyOf` list for the response status `200` - the response property `choices/items/message/refusal` became required for the status `200` - **2026-09-28** `baee5b6ef947`: 3 breaking, 1 info - the response property `choices/items/message/function_call` became nullable for the status `200` - the response property `choices/items/message/refusal` became optional for the status `200` - the `choices/items/message/tool_calls` response's property type changed from `array` to no type for status `200` - added `#/components/schemas/ChatCompletionMessageToolCalls, subschema #2` to the `choices/items/message/tool_calls` response property `anyOf` list for the response status `200` - **2026-09-25** `8166b0205067`: 3 info - added the non-success response with the status `404` - added the non-success response with the status `429` - added the non-success response with the status `500` - **2026-09-08** `bb9b3b410112`: 4 info - added the optional property `metadata` to the response with the `200` status - added the optional property `usage/completion_tokens_details/text_tokens` to the response with the `200` status - added the optional property `usage/prompt_tokens_details/image_tokens` to the response with the `200` status - added the optional property `usage/prompt_tokens_details/text_tokens` to the response with the `200` status - **2026-09-01** `ca86486f9fef`: 1 warning - removed the optional property `usage/compute_units` from the response with the `200` status - **2026-08-27** `60c5936f2a2f`: 1 info - added the optional property `usage/compute_units` to the response with the `200` status - **2026-08-14** `9080adae100c`: 1 info - added the optional property `metadata` to the response with the `200` status - **2026-08-14** `fe3335711e48`: 3 info - added the optional property `usage/completion_tokens_details/text_tokens` to the response with the `200` status - added the optional property `usage/prompt_tokens_details/image_tokens` to the response with the `200` status - added the optional property `usage/prompt_tokens_details/text_tokens` to the response with the `200` status - **2026-08-05** `ab0c5306e390`: 1 warning, 2 info - added the new `fast` enum value to the `service_tier/anyOf[subschema #1]/` response property for the response status `200` - added the optional property `moderation` to the response with the `200` status - added the optional property `usage/prompt_tokens_details/cache_write_tokens` to the response with the `200` status - **2026-07-30** `26e845904dd2`: 1 warning - added the new `fast` enum value to the `service_tier/anyOf[subschema #1]/` response property for the response status `200` - **2026-07-30** `39027dbff247`: 1 warning - added the new `fast` enum value to the `service_tier/anyOf[subschema #1]/` response property for the response status `200` - **2026-07-15** `4065aec90c5d`: 2 info - added the optional property `moderation` to the response with the `200` status - added the optional property `usage/prompt_tokens_details/cache_write_tokens` to the response with the `200` status - **2026-07-09** `e0508a503b84`: 1 info - added the optional property `usage/prompt_tokens_details/cache_write_tokens` to the response with the `200` status - **2026-06-03** `60433c6df861`: 1 info - added the optional property `moderation` to the response with the `200` status - **2026-05-13** `74cbcf73838f`: 16 breaking, 8 info - response property `choices/items/message/content` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `choices/items/message/refusal` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `service_tier` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - added `#/components/schemas/ChatCompletionMessageToolCall, #/components/schemas/ChatCompletionMessageCustomToolCall` to the `choices/items/message/tool_calls/items/` response property `oneOf` list for the response status `200` - the `choices/items/logprobs` response's property type changed from `object` to no type for status `200` - the `choices/items/message/audio` response's property type changed from `object` to no type for status `200` - the `choices/items/message/tool_calls/items/` response's property type changed from `object` to no type for status `200` - removed the required property `choices/items/logprobs/content` from the response with the `200` status - removed the required property `choices/items/logprobs/refusal` from the response with the `200` status - removed the required property `choices/items/message/audio/data` from the response with the `200` status - removed the required property `choices/items/message/audio/expires_at` from the response with the `200` status - removed the required property `choices/items/message/audio/id` from the response with the `200` status - removed the required property `choices/items/message/audio/transcript` from the response with the `200` status - removed the required property `choices/items/message/tool_calls/items/function` from the response with the `200` status - removed the required property `choices/items/message/tool_calls/items/id` from the response with the `200` status - removed the required property `choices/items/message/tool_calls/items/type` from the response with the `200` status - added `subschema #1, subschema #2` to the `choices/items/logprobs` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `choices/items/message/audio` response property `anyOf` list for the response status `200` - the `service_tier` response's property default value `auto` was removed for the status `200` - response property `system_fingerprint` deprecated - added discriminator to `choices/items/message/tool_calls/items/` response property for the response status `200` - removed the `auto` enum value from the `service_tier` response property for the response status `200` - removed the `default` enum value from the `service_tier` response property for the response status `200` - removed the `flex` enum value from the `service_tier` response property for the response status `200` - **2026-04-10** `7c540cce6eb3`: 15 breaking, 9 info - response property `choices/items/message/content` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `choices/items/message/refusal` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - response property `service_tier` list-of-types was widened by adding types `null` to media type `application/json` of response `200` - the `choices/items/logprobs` response's property type changed from `object` to no type for status `200` - the `choices/items/message/audio` response's property type changed from `object` to no type for status `200` - the `choices/items/message/tool_calls/items/` response's property type changed from `object` to no type for status `200` - removed the required property `choices/items/logprobs/content` from the response with the `200` status - removed the required property `choices/items/logprobs/refusal` from the response with the `200` status - removed the required property `choices/items/message/audio/data` from the response with the `200` status - removed the required property `choices/items/message/audio/expires_at` from the response with the `200` status - removed the required property `choices/items/message/audio/id` from the response with the `200` status - removed the required property `choices/items/message/audio/transcript` from the response with the `200` status - removed the required property `choices/items/message/tool_calls/items/function` from the response with the `200` status - removed the required property `choices/items/message/tool_calls/items/id` from the response with the `200` status - removed the required property `choices/items/message/tool_calls/items/type` from the response with the `200` status - added `#/components/schemas/ChatCompletionMessageToolCall, #/components/schemas/ChatCompletionMessageCustomToolCall` to the `choices/items/message/tool_calls/items/` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `choices/items/logprobs` response property `anyOf` list for the response status `200` - added `subschema #1, subschema #2` to the `choices/items/message/audio` response property `anyOf` list for the response status `200` - the `service_tier` response's property default value `auto` was removed for the status `200` - response property `system_fingerprint` deprecated - added discriminator to `choices/items/message/tool_calls/items/` response property for the response status `200` - removed the `auto` enum value from the `service_tier` response property for the response status `200` - removed the `default` enum value from the `service_tier` response property for the response status `200` - removed the `flex` enum value from the `service_tier` response property for the response status `200` - **2025-04-29** `6a6c681b1820`: 2 warning, 2 info - added the new `auto` enum value to the `service_tier` response property for the response status `200` - added the new `flex` enum value to the `service_tier` response property for the response status `200` - the `service_tier` response's property default value `auto` was added for the status `200` - removed the `scale` enum value from the `service_tier` response property for the response status `200` - **2025-03-11** `6ab43fe7798e`: 1 info - endpoint added --- [Operation](https://skmtc.dev/openai/apis/openapi/docs/chat/completions/:completion_id/get.md) - [API](https://skmtc.dev/openai/apis/openapi.md) - [Page](https://skmtc.dev/openai/apis/openapi/changes/chat/completions/:completion_id/get)