Changes to Create a Message Batch

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

added the enum value experimental-claude-tag-2026-10-21 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

added the enum value analytics-usage-cost-2026-08-24 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

added the new optional request property requests/items/params/thread

added the enum value message-threads-2026-08-12 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

the requests/items/params/messages/items request property type changed from object to no type

removed the request property requests/items/params/messages/items/clear_at

removed the request property requests/items/params/messages/items/content

removed the request property requests/items/params/messages/items/output_config

removed the request property requests/items/params/messages/items/role

removed the request property requests/items/params/temperature

removed the request property requests/items/params/top_k

removed the request property requests/items/params/top_p

added assistant system user discriminator mapping keys to the requests/items/params/messages/items request property

added BetaUserInputMessage BetaAssistantInputMessage BetaSystemInputMessage to the requests/items/params/messages/items request property oneOf list

added the enum value webhooks-2026-10-07 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

added the enum value telemetry-destinations-2026-08-11 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

removed subschema #15 subschema #16 from the requests/items/params/fallbacks/anyOf[subschema #1]/items/model request property anyOf list

removed subschema #15 subschema #16 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #20: RequestCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

removed subschema #15 subschema #16 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

removed subschema #15 subschema #16 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/from/model request property anyOf list

removed subschema #15 subschema #16 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/to/model request property anyOf list

removed subschema #15 subschema #16 from the requests/items/params/model request property anyOf list

removed subschema #15 subschema #16 from the requests/items/params/tools/items/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added subschema #15 subschema #16 to the requests/items/params/fallbacks/anyOf[subschema #1]/items/model request property anyOf list

added subschema #15 subschema #16 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #20: RequestCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added subschema #15 subschema #16 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added subschema #15 subschema #16 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/from/model request property anyOf list

added subschema #15 subschema #16 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/to/model request property anyOf list

added subschema #15 subschema #16 to the requests/items/params/model request property anyOf list

added subschema #15 subschema #16 to the requests/items/params/tools/items/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

the error response's property type changed from no type to object for status 400

the error response's property type changed from no type to object for status 429

added the optional property error/details to the response with the 400 status

added the optional property error/details to the response with the 429 status

removed discriminator from error response property for the response status 400

removed discriminator from error response property for the response status 429

removed BetaInvalidRequestError BetaAuthenticationError BetaBillingError BetaPermissionError BetaNotFoundError BetaRateLimitError BetaGatewayTimeoutError BetaAPIError BetaOverloadedError from the error response property oneOf list for the response status 400

removed BetaInvalidRequestError BetaAuthenticationError BetaBillingError BetaPermissionError BetaNotFoundError BetaRateLimitError BetaGatewayTimeoutError BetaAPIError BetaOverloadedError from the error response property oneOf list for the response status 429

added the required property error/message to the response with the 400 status

added the required property error/message to the response with the 429 status

added the required property error/type to the response with the 400 status

added the required property error/type to the response with the 429 status

added subschema #1 to the requests/items/params/fallbacks/anyOf[subschema #1]/items/model request property anyOf list

added subschema #1 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #20: RequestCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added subschema #1 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added subschema #1 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/from/model request property anyOf list

added subschema #1 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/to/model request property anyOf list

added subschema #1 to the requests/items/params/model request property anyOf list

added subschema #1 to the requests/items/params/tools/items/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

removed subschema #18 subschema #19 from the requests/items/params/fallbacks/anyOf[subschema #1]/items/model request property anyOf list

removed subschema #18 subschema #19 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #20: RequestCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

removed subschema #18 subschema #19 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

removed subschema #18 subschema #19 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/from/model request property anyOf list

removed subschema #18 subschema #19 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/to/model request property anyOf list

removed subschema #18 subschema #19 from the requests/items/params/model request property anyOf list

removed subschema #18 subschema #19 from the requests/items/params/tools/items/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

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 requests/items/params/fallbacks/anyOf[subschema #1]/items/model request property anyOf list

added subschema #18 subschema #19 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #20: RequestCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added subschema #18 subschema #19 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added subschema #18 subschema #19 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/from/model request property anyOf list

added subschema #18 subschema #19 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/to/model request property anyOf list

added subschema #18 subschema #19 to the requests/items/params/model request property anyOf list

added subschema #18 subschema #19 to the requests/items/params/tools/items/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added the enum value ce-plugins-2026-09-01 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

removed subschema #4 from the requests/items/params/fallbacks/anyOf[subschema #1]/items/model request property anyOf list

removed subschema #4 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #20: RequestCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

removed subschema #4 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

removed subschema #4 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/from/model request property anyOf list

removed subschema #4 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/to/model request property anyOf list

removed subschema #4 from the requests/items/params/model request property anyOf list

removed subschema #4 from the requests/items/params/tools/items/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added subschema #1 subschema #5 to the requests/items/params/fallbacks/anyOf[subschema #1]/items/model request property anyOf list

added subschema #1 subschema #5 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #20: RequestCompactionBlock]/tool_changes/anyOf[subschema #1]/items/oneOf[subschema #1: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added subschema #1 subschema #5 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestToolAdditionBlock]/tool/oneOf[subschema #4: ToolChangeToolDefinition]/definition/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added subschema #1 subschema #5 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/from/model request property anyOf list

added subschema #1 subschema #5 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/to/model request property anyOf list

added subschema #1 subschema #5 to the requests/items/params/model request property anyOf list

added subschema #1 subschema #5 to the requests/items/params/tools/items/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added between_tools discriminator mapping keys to the requests/items/params/fallbacks/anyOf[subschema #1]/items/thinking/anyOf[subschema #1] request property

added between_tools discriminator mapping keys to the requests/items/params/thinking request property

added BetaThinkingConfigBetweenTools to the requests/items/params/fallbacks/anyOf[subschema #1]/items/thinking/anyOf[subschema #1] request property oneOf list

added BetaThinkingConfigBetweenTools to the requests/items/params/thinking request property oneOf list

removed discriminator from requests/items/params/context_management/anyOf[subschema #1: ContextManagementConfig]/edits/items/oneOf[subschema #2: ClearThinking20251015]/keep/anyOf[subschema #1] request property

added the new optional request property requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #20: RequestCompactionBlock]/tool_changes

added the new optional request property requests/items/params/tools/items/oneOf[subschema #28: MCPToolset]/tools

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 subschema #3 to the requests/items/params/fallbacks/anyOf[subschema #1]/items/model request property anyOf list

added subschema #3 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #23: RequestFallbackBlock -> subschema #24: RequestFallbackBlock]/from/model request property anyOf list

added subschema #3 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #23: RequestFallbackBlock -> subschema #24: RequestFallbackBlock]/to/model request property anyOf list

added subschema #3 to the requests/items/params/model request property anyOf list

added subschema #3 to the requests/items/params/tools/items/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added mcp_tool_listing discriminator mapping keys to the requests/items/params/messages/items/content/anyOf[subschema #2]/items request property

added tool_definition discriminator mapping keys to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestToolAdditionBlock]/tool request property

added BetaRequestMCPToolListingBlock to the requests/items/params/messages/items/content/anyOf[subschema #2]/items request property oneOf list

added BetaToolChangeToolDefinition to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestToolAdditionBlock]/tool request property oneOf list

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

added the new optional request property requests/items/params/compaction

added the new optional request property requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #20: RequestCompactionBlock]/signature

added the new optional request property requests/items/params/tools/items/oneOf[subschema #19: WebFetchTool_20250910]/url_sources

added the new optional request property requests/items/params/tools/items/oneOf[subschema #21: WebFetchTool_20260209]/url_sources

added the new optional request property requests/items/params/tools/items/oneOf[subschema #22: WebFetchTool_20260309]/url_sources

added the new optional request property requests/items/params/tools/items/oneOf[subschema #24: WebFetchTool_20260318]/url_sources

added the new content_too_large enum value to the request property requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #11: RequestWebFetchToolResultBlock]/content/anyOf[subschema #1: RequestWebFetchToolResultError]/error_code

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

removed the request property requests/items/params/tools/items/oneOf[subschema #14: ComputerToolset_20260801]/allowed_callers

removed the request property requests/items/params/tools/items/oneOf[subschema #8: BrowserToolset_20260801]/allowed_callers

added the new optional request property requests/items/params/fallbacks/anyOf[subschema #1]/items/thinking/anyOf[subschema #1]/oneOf[subschema #1: ThinkingConfigEnabled]/block_binding

added the new optional request property requests/items/params/fallbacks/anyOf[subschema #1]/items/thinking/anyOf[subschema #1]/oneOf[subschema #3: ThinkingConfigAdaptive]/block_binding

added the new optional request property requests/items/params/messages/items/clear_at

added the new optional request property requests/items/params/messages/items/output_config

added the new optional request property requests/items/params/thinking/oneOf[subschema #1: ThinkingConfigEnabled]/block_binding

added the new optional request property requests/items/params/thinking/oneOf[subschema #3: ThinkingConfigAdaptive]/block_binding

added subschema #2 subschema #3 to the requests/items/params/fallbacks/anyOf[subschema #1]/items/model request property anyOf list

added subschema #2 subschema #3 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #23: RequestFallbackBlock]/from/model request property anyOf list

added subschema #2 subschema #3 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #23: RequestFallbackBlock]/to/model request property anyOf list

added subschema #2 subschema #3 to the requests/items/params/model request property anyOf list

added subschema #2 subschema #3 to the requests/items/params/tools/items/oneOf[subschema #25: AdvisorTool_20260301]/model request property anyOf list

added the new updates enum value to the request property requests/items/params/fallbacks/anyOf[subschema #1]/items/thinking/anyOf[subschema #1]/oneOf[subschema #1: ThinkingConfigEnabled]/display/anyOf[subschema #1: ThinkingDisplayMode]

added the new updates enum value to the request property requests/items/params/fallbacks/anyOf[subschema #1]/items/thinking/anyOf[subschema #1]/oneOf[subschema #3: ThinkingConfigAdaptive]/display/anyOf[subschema #1: ThinkingDisplayMode]

added the new updates enum value to the request property requests/items/params/thinking/oneOf[subschema #1: ThinkingConfigEnabled]/display/anyOf[subschema #1: ThinkingDisplayMode]

added the new updates enum value to the request property requests/items/params/thinking/oneOf[subschema #3: ThinkingConfigAdaptive]/display/anyOf[subschema #1: ThinkingDisplayMode]

added the new optional request property requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #11: RequestWebFetchToolResultBlock]/content/anyOf[subschema #2: RequestWebFetchResultBlock]/content/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #2: RequestImageBlock]/transformations

added the new optional request property requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #2: RequestImageBlock]/transformations

added the new optional request property requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #3: RequestDocumentBlock]/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #2: RequestImageBlock]/transformations

added the new optional request property requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #7: RequestToolUseBlock]/toolset_name

added the new optional request property requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items/oneOf[subschema #2: RequestImageBlock]/transformations

added the new optional request property requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items/oneOf[subschema #4: RequestDocumentBlock]/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #2: RequestImageBlock]/transformations

added the new optional request property requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/toolset_name

added browser_state discriminator mapping keys to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items request property

added BetaBrowserToolset_20260801 BetaComputerToolset_20260801 to the requests/items/params/tools/items request property oneOf list

added BetaRequestBrowserStateBlock to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items request property oneOf list

removed BetaRequestMidConvSystemBlock from the requests/items/params/messages/items/content/anyOf[subschema #2]/items request property oneOf list

removed mid_conv_system discriminator mapping keys from the requests/items/params/messages/items/content/anyOf[subschema #2]/items request property

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #11: RequestWebFetchToolResultBlock]/content/anyOf[subschema #2: RequestWebFetchResultBlock]/content/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #1: RequestCharLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #11: RequestWebFetchToolResultBlock]/content/anyOf[subschema #2: RequestWebFetchResultBlock]/content/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #2: RequestPageLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #11: RequestWebFetchToolResultBlock]/content/anyOf[subschema #2: RequestWebFetchResultBlock]/content/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #3: RequestContentBlockLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #18: RequestMCPToolResultBlock]/content/anyOf[subschema #2: beta_mcp_tool_result_block_param_content]/items/citations/anyOf[subschema #1]/items/oneOf[subschema #1: RequestCharLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #18: RequestMCPToolResultBlock]/content/anyOf[subschema #2: beta_mcp_tool_result_block_param_content]/items/citations/anyOf[subschema #1]/items/oneOf[subschema #2: RequestPageLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #18: RequestMCPToolResultBlock]/content/anyOf[subschema #2: beta_mcp_tool_result_block_param_content]/items/citations/anyOf[subschema #1]/items/oneOf[subschema #3: RequestContentBlockLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #1: RequestCharLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #2: RequestPageLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #3: RequestContentBlockLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestMidConvSystemBlock]/content/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #1: RequestCharLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestMidConvSystemBlock]/content/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #2: RequestPageLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestMidConvSystemBlock]/content/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #3: RequestContentBlockLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #3: RequestDocumentBlock]/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #1: RequestCharLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #3: RequestDocumentBlock]/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #2: RequestPageLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #3: RequestDocumentBlock]/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #3: RequestContentBlockLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #4: RequestSearchResultBlock]/content/items/citations/anyOf[subschema #1]/items/oneOf[subschema #1: RequestCharLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #4: RequestSearchResultBlock]/content/items/citations/anyOf[subschema #1]/items/oneOf[subschema #2: RequestPageLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #4: RequestSearchResultBlock]/content/items/citations/anyOf[subschema #1]/items/oneOf[subschema #3: RequestContentBlockLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #1: RequestCharLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #2: RequestPageLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #3: RequestContentBlockLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items/oneOf[subschema #3: RequestSearchResultBlock]/content/items/citations/anyOf[subschema #1]/items/oneOf[subschema #1: RequestCharLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items/oneOf[subschema #3: RequestSearchResultBlock]/content/items/citations/anyOf[subschema #1]/items/oneOf[subschema #2: RequestPageLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items/oneOf[subschema #3: RequestSearchResultBlock]/content/items/citations/anyOf[subschema #1]/items/oneOf[subschema #3: RequestContentBlockLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items/oneOf[subschema #4: RequestDocumentBlock]/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #1: RequestCharLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items/oneOf[subschema #4: RequestDocumentBlock]/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #2: RequestPageLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #8: RequestToolResultBlock]/content/anyOf[subschema #2]/items/oneOf[subschema #4: RequestDocumentBlock]/source/oneOf[subschema #3: ContentBlockSource]/content/anyOf[subschema #2: beta_content_block_source_content]/items/oneOf[subschema #1: RequestTextBlock]/citations/anyOf[subschema #1]/items/oneOf[subschema #3: RequestContentBlockLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/system/anyOf[subschema #2]/items/citations/anyOf[subschema #1]/items/oneOf[subschema #1: RequestCharLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/system/anyOf[subschema #2]/items/citations/anyOf[subschema #1]/items/oneOf[subschema #2: RequestPageLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

the requests/items/params/system/anyOf[subschema #2]/items/citations/anyOf[subschema #1]/items/oneOf[subschema #3: RequestContentBlockLocationCitation]/document_title/anyOf[subschema #1] request property's maxLength was increased from 255 to 500

removed subschema #17 subschema #18 from the requests/items/params/fallbacks/anyOf[subschema #1]/items/model request property anyOf list

removed subschema #17 subschema #18 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/from/model request property anyOf list

removed subschema #17 subschema #18 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #24: RequestFallbackBlock]/to/model request property anyOf list

removed subschema #17 subschema #18 from the requests/items/params/model request property anyOf list

removed subschema #17 subschema #18 from the requests/items/params/tools/items/oneOf[subschema #23: AdvisorTool_20260301]/model request property anyOf list

removed subschema #5 subschema #6 subschema #8 subschema #12 subschema #13 subschema #16 subschema #17 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #22: RequestFallbackBlock -> subschema #24: RequestFallbackBlock]/from/model request property anyOf list

removed subschema #5 subschema #6 subschema #8 subschema #12 subschema #13 subschema #16 subschema #17 from the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #22: RequestFallbackBlock -> subschema #24: RequestFallbackBlock]/to/model request property anyOf list

removed subschema #5 subschema #6 subschema #8 subschema #12 subschema #13 subschema #16 subschema #17 from the requests/items/params/model request property anyOf list

removed subschema #5 subschema #6 subschema #8 subschema #12 subschema #13 subschema #16 subschema #17 from the requests/items/params/tools/items/oneOf[subschema #23: AdvisorTool_20260301]/model request property anyOf list

added BetaFallbackCreditTokenParam to the requests/items/params/fallback_credit_token request property anyOf list

added subschema #5 subschema #6 subschema #7 subschema #9 subschema #13 subschema #14 subschema #17 subschema #18 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #22: RequestFallbackBlock -> subschema #24: RequestFallbackBlock]/from/model request property anyOf list

added subschema #5 subschema #6 subschema #7 subschema #9 subschema #13 subschema #14 subschema #17 subschema #18 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #22: RequestFallbackBlock -> subschema #24: RequestFallbackBlock]/to/model request property anyOf list

added subschema #5 subschema #6 subschema #7 subschema #9 subschema #13 subschema #14 subschema #17 subschema #18 to the requests/items/params/model request property anyOf list

added subschema #5 subschema #6 subschema #7 subschema #9 subschema #13 subschema #14 subschema #17 subschema #18 to the requests/items/params/tools/items/oneOf[subschema #23: AdvisorTool_20260301]/model request property anyOf list

added tool_addition tool_removal discriminator mapping keys to the requests/items/params/messages/items/content/anyOf[subschema #2]/items request property

added tool_addition tool_removal discriminator mapping keys to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestMidConvSystemBlock]/content/items request property

request property requests/items/params/fallbacks list-of-types was widened by adding types string to media type application/json

added BetaRequestToolAdditionBlock BetaRequestToolRemovalBlock to the requests/items/params/messages/items/content/anyOf[subschema #2]/items request property oneOf list

added BetaRequestToolAdditionBlock BetaRequestToolRemovalBlock to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #21: RequestMidConvSystemBlock]/content/items request property oneOf list

added subschema #2 to the requests/items/params/fallbacks/anyOf[subschema #1]/items/model request property anyOf list

added subschema #2 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #22: RequestFallbackBlock]/from/model request property anyOf list

added subschema #2 to the requests/items/params/messages/items/content/anyOf[subschema #2]/items/oneOf[subschema #22: RequestFallbackBlock]/to/model request property anyOf list