Changes to Openai Chat Completions

Changed in 6 of the 17 revisions of this API.▲3○17

1. Aug 24, 2026900aef7c556d▲1○1
2. Aug 14, 202663ee8b82144f○1
3. Aug 7, 20262df28210837a▲1○3
4. Aug 5, 20262418bb7a2691○1
5. Jul 31, 2026ba92d7849914▲1○2
6. Jul 26, 202609df98e6ea15○9

What changed

• Aug 24, 2026900aef7c556d▲1○1See the full diff
  • ▲

    removed ChatCompletionToolMessage ChatCompletionAssistantMessage ChatCompletionUserMessage ChatCompletionSystemMessage from the messages/items/ request property anyOf list

    request-property-any-of-removed

  • ○

    added ChatCompletionToolMessage ChatCompletionAssistantMessage ChatCompletionUserMessage ChatCompletionSystemMessage to the messages/items/ request property oneOf list

    request-property-one-of-added

• Aug 14, 202663ee8b82144f○1See the full diff
  • ○

    added the new optional request property models

    new-optional-request-property

• Aug 7, 20262df28210837a▲1○3See the full diff
  • ▲

    request property tool_choice/anyOf[subschema #1]/ was restricted to a list of enum values

    request-property-became-enum

  • ○

    added the new auto enum value to the request property tool_choice/anyOf[subschema #1]/

    request-property-enum-value-added

  • ○

    added the new none enum value to the request property tool_choice/anyOf[subschema #1]/

    request-property-enum-value-added

  • ○

    added the new required enum value to the request property tool_choice/anyOf[subschema #1]/

    request-property-enum-value-added

• Aug 5, 20262418bb7a2691○1See the full diff
  • ○

    added the new optional request property ignore_eos

    new-optional-request-property

• Jul 31, 2026ba92d7849914▲1○2See the full diff
  • ▲

    removed ChatTools from the tool_choice request property anyOf list

    request-property-any-of-removed

  • ○

    added the new optional request property fail_fast

    new-optional-request-property

  • ○

    added FunctionTool to the tool_choice request property anyOf list

    request-property-any-of-added

  This revision also has 3 changes that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog

• Jul 26, 202609df98e6ea15○9See the full diff
  • ○

    added the new optional request property messages/items/anyOf[subschema #1: ChatCompletionToolMessage]/content/anyOf[subschema #2]/items/prompt_cache_breakpoint

    new-optional-request-property

  • ○

    added the new optional request property messages/items/anyOf[subschema #2: ChatCompletionAssistantMessage]/content/anyOf[subschema #2]/items/prompt_cache_breakpoint

    new-optional-request-property

  • ○

    added the new optional request property messages/items/anyOf[subschema #3: ChatCompletionUserMessage]/content/anyOf[subschema #2]/items/anyOf[subschema #1: ChatCompletionContentPartText]/prompt_cache_breakpoint

    new-optional-request-property

  • ○

    added the new optional request property messages/items/anyOf[subschema #4: ChatCompletionSystemMessage]/content/anyOf[subschema #2]/items/prompt_cache_breakpoint

    new-optional-request-property

  • ○

    added the new optional request property prompt_cache_options

    new-optional-request-property

  • ○

    added the new max enum value to the request property reasoning/anyOf[subschema #1: ChatReasoningSettings]/effort/anyOf[subschema #1]/

    request-property-enum-value-added

  • ○

    added the new max enum value to the request property reasoning_effort/anyOf[subschema #1]/

    request-property-enum-value-added

  • ○

    added the new minimal enum value to the request property reasoning/anyOf[subschema #1: ChatReasoningSettings]/effort/anyOf[subschema #1]/

    request-property-enum-value-added

  • ○

    added the new minimal enum value to the request property reasoning_effort/anyOf[subschema #1]/

    request-property-enum-value-added