Changes to Create thread and run

Changed in 14 of the 163 revisions of this API.▲55●12○67

1. Sep 3, 20269430b00d75b4○1
2. Aug 14, 20266ac2618eefd7○1
3. May 13, 202674cbcf73838f▲17●2○19
4. Apr 29, 20256a6c681b1820○6
5. Mar 11, 20256ab43fe7798e▲2●1○5
6. Jan 31, 2025fc164a27fdb9▲11●3○6
7. Jan 31, 202515156e46769c▲8●3○11
8. Jan 22, 2025bdebcdfcbbde▲11●3○5
9. Dec 4, 2024223e7c033ac6○1
10. Sep 13, 20244c9e3967c707▲1○1
11. Aug 23, 20245856f8b0c850○2
12. Aug 6, 20248eca3b09b705▲3○7
13. Jul 17, 202412529f330aab▲2
14. Jul 15, 2024493a67abde1a○2

What changed

• Sep 3, 20269430b00d75b4○1See the full diff
  • ○

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

    response-optional-property-added

• Aug 14, 20266ac2618eefd7○1See the full diff
  • ○

    added the non-success response with the status 429

    response-non-success-status-added

• May 13, 202674cbcf73838f▲17●2○19See the full diff
  • ▲

    the request property metadata became not nullable

    request-property-became-not-nullable

  • ▲

    the request property response_format/oneOf[subschema #4: JSON schema]/json_schema/strict became not nullable

    request-property-became-not-nullable

  • ▲

    the request property thread/messages/items/attachments became not nullable

    request-property-became-not-nullable

  • ▲

    the request property thread/messages/items/metadata became not nullable

    request-property-became-not-nullable

  • ▲

    the request property thread/metadata became not nullable

    request-property-became-not-nullable

  • ▲

    the request property thread/tool_resources became not nullable

    request-property-became-not-nullable

  • ▲

    the request property tools/items/oneOf[subschema #3: Function tool]/function/strict became not nullable

    request-property-became-not-nullable

  • ▲

    the request property truncation_strategy/allOf[subschema #1: Thread Truncation Controls]/last_messages became not nullable

    request-property-became-not-nullable

  • ▲

    the thread/tool_resources request property type changed from object to no type

    request-property-type-changed

  • ▲

    response property metadata list-of-types was widened by adding types null to media type application/json of response 200

    response-property-list-of-types-widened

  • ▲

    response property response_format/oneOf[subschema #4: JSON schema]/json_schema/strict list-of-types was widened by adding types null to media type application/json of response 200

    response-property-list-of-types-widened

  • ▲

    response property tools/items/oneOf[subschema #3: Function tool]/function/strict list-of-types was widened by adding types null to media type application/json of response 200

    response-property-list-of-types-widened

  • ▲

    response property truncation_strategy/allOf[subschema #1: Thread Truncation Controls]/last_messages list-of-types was widened by adding types null to media type application/json of response 200

    response-property-list-of-types-widened

  • ▲

    the usage response's property type changed from object to no type for status 200

    response-property-type-changed

  • ▲

    removed the required property usage/completion_tokens from the response with the 200 status

    response-required-property-removed

  • ▲

    removed the required property usage/prompt_tokens from the response with the 200 status

    response-required-property-removed

  • ▲

    removed the required property usage/total_tokens from the response with the 200 status

    response-required-property-removed

  • ●

    removed the request property thread/tool_resources/code_interpreter

    request-property-removed

  • ●

    removed the request property thread/tool_resources/file_search

    request-property-removed

  • ○

    added subschema #1 subschema #2 to the thread/tool_resources request property anyOf list

    request-property-any-of-added

  • ○

    the strict request property default value false was removed

    request-property-default-value-removed

  • ○

    the strict request property default value false was removed

    request-property-default-value-removed

  • ○

    added the new gpt-5 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-5-2025-08-07 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-5-mini enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-5-mini-2025-08-07 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-5-nano enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-5-nano-2025-08-07 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    request property metadata list-of-types was widened by adding types null to media type application/json

    request-property-list-of-types-widened

  • ○

    request property response_format/oneOf[subschema #4: JSON schema]/json_schema/strict list-of-types was widened by adding types null to media type application/json

    request-property-list-of-types-widened

  • ○

    request property thread/messages/items/attachments list-of-types was widened by adding types null to media type application/json

    request-property-list-of-types-widened

  • ○

    request property thread/messages/items/metadata list-of-types was widened by adding types null to media type application/json

    request-property-list-of-types-widened

  • ○

    request property thread/metadata list-of-types was widened by adding types null to media type application/json

    request-property-list-of-types-widened

  • ○

    request property tools/items/oneOf[subschema #3: Function tool]/function/strict list-of-types was widened by adding types null to media type application/json

    request-property-list-of-types-widened

  • ○

    request property truncation_strategy/allOf[subschema #1: Thread Truncation Controls]/last_messages list-of-types was widened by adding types null to media type application/json

    request-property-list-of-types-widened

  • ○

    added subschema #1 subschema #2 to the usage response property anyOf list for the response status 200

    response-property-any-of-added

  • ○

    the strict response's property default value false was removed for the status 200

    response-property-default-value-removed

  • ○

    the strict response's property default value false was removed for the status 200

    response-property-default-value-removed

  This revision also has 40 changes that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog

• Apr 29, 20256a6c681b1820○6See the full diff
  • ○

    added the new gpt-4.1 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-4.1-2025-04-14 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-4.1-mini enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-4.1-mini-2025-04-14 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-4.1-nano enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-4.1-nano-2025-04-14 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  This revision also has 18 changes that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog

• Mar 11, 20256ab43fe7798e▲2●1○5See the full diff
  • ▲

    the response property response_format became nullable for the status 200

    response-property-became-nullable

  • ▲

    added ResponseFormatText ResponseFormatJsonObject ResponseFormatJsonSchema subschema #1 to the response_format response property oneOf list for the response status 200

    response-property-one-of-added

  • ●

    removed AssistantsApiResponseFormatOption subschema #2 from the response_format request property allOf list

    request-property-all-of-removed

  • ○

    the request property response_format became nullable

    request-property-became-nullable

  • ○

    added the new gpt-4.5-preview enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-4.5-preview-2025-02-27 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added ResponseFormatText ResponseFormatJsonObject ResponseFormatJsonSchema subschema #1 to the response_format request property oneOf list

    request-property-one-of-added

  • ○

    removed AssistantsApiResponseFormatOption subschema #2 from the response_format response property allOf list for the response status 200

    response-property-all-of-removed

• Jan 31, 2025fc164a27fdb9▲11●3○6See the full diff
  • ▲

    added AssistantsApiResponseFormatOption subschema #2 to the response_format request property allOf list

    request-property-all-of-added

  • ▲

    added AssistantsApiToolChoiceOption subschema #2 to the tool_choice request property allOf list

    request-property-all-of-added

  • ▲

    added TruncationObject subschema #2 to the truncation_strategy request property allOf list

    request-property-all-of-added

  • ▲

    the request property response_format became not nullable

    request-property-became-not-nullable

  • ▲

    the request property tool_choice became not nullable

    request-property-became-not-nullable

  • ▲

    the request property truncation_strategy became not nullable

    request-property-became-not-nullable

  • ▲

    removed AssistantsNamedToolChoice subschema #1 from the tool_choice request property oneOf list

    request-property-one-of-removed

  • ▲

    removed ResponseFormatText ResponseFormatJsonObject ResponseFormatJsonSchema subschema #1 from the response_format request property oneOf list

    request-property-one-of-removed

  • ▲

    the truncation_strategy request property type changed from object to no type

    request-property-type-changed

  • ▲

    the truncation_strategy response's property type changed from object to no type for status 200

    response-property-type-changed

  • ▲

    removed the required property truncation_strategy/type from the response with the 200 status

    response-required-property-removed

  • ●

    removed the request property truncation_strategy/last_messages

    request-property-removed

  • ●

    removed the request property truncation_strategy/type

    request-property-removed

  • ●

    removed the optional property truncation_strategy/last_messages from the response with the 200 status

    response-optional-property-removed

  • ○

    the request property thread/tool_resources/file_search/vector_stores/items/metadata became nullable

    request-property-became-nullable

  • ○

    added AssistantsApiResponseFormatOption subschema #2 to the response_format response property allOf list for the response status 200

    response-property-all-of-added

  • ○

    added AssistantsApiToolChoiceOption subschema #2 to the tool_choice response property allOf list for the response status 200

    response-property-all-of-added

  • ○

    added TruncationObject subschema #2 to the truncation_strategy response property allOf list for the response status 200

    response-property-all-of-added

  • ○

    removed AssistantsNamedToolChoice subschema #1 from the tool_choice response property oneOf list for the response status 200

    response-property-one-of-removed

  • ○

    removed ResponseFormatText ResponseFormatJsonObject ResponseFormatJsonSchema subschema #1 from the response_format response property oneOf list for the response status 200

    response-property-one-of-removed

• Jan 31, 202515156e46769c▲8●3○11See the full diff
  • ▲

    added the new required request property truncation_strategy/type

    new-required-request-property

  • ▲

    the truncation_strategy request property type changed from no type to object

    request-property-type-changed

  • ▲

    the response property response_format became nullable for the status 200

    response-property-became-nullable

  • ▲

    the response property tool_choice became nullable for the status 200

    response-property-became-nullable

  • ▲

    the response property truncation_strategy became nullable for the status 200

    response-property-became-nullable

  • ▲

    added AssistantsNamedToolChoice subschema #1 to the tool_choice response property oneOf list for the response status 200

    response-property-one-of-added

  • ▲

    added ResponseFormatText ResponseFormatJsonObject ResponseFormatJsonSchema subschema #1 to the response_format response property oneOf list for the response status 200

    response-property-one-of-added

  • ▲

    the truncation_strategy response's property type changed from no type to object for status 200

    response-property-type-changed

  • ●

    removed AssistantsApiResponseFormatOption subschema #2 from the response_format request property allOf list

    request-property-all-of-removed

  • ●

    removed AssistantsApiToolChoiceOption subschema #2 from the tool_choice request property allOf list

    request-property-all-of-removed

  • ●

    removed TruncationObject subschema #2 from the truncation_strategy request property allOf list

    request-property-all-of-removed

  • ○

    added the new optional request property truncation_strategy/last_messages

    new-optional-request-property

  • ○

    the request property response_format became nullable

    request-property-became-nullable

  • ○

    the request property tool_choice became nullable

    request-property-became-nullable

  • ○

    the request property truncation_strategy became nullable

    request-property-became-nullable

  • ○

    added AssistantsNamedToolChoice subschema #1 to the tool_choice request property oneOf list

    request-property-one-of-added

  • ○

    added ResponseFormatText ResponseFormatJsonObject ResponseFormatJsonSchema subschema #1 to the response_format request property oneOf list

    request-property-one-of-added

  • ○

    added the optional property truncation_strategy/last_messages to the response with the 200 status

    response-optional-property-added

  • ○

    removed AssistantsApiResponseFormatOption subschema #2 from the response_format response property allOf list for the response status 200

    response-property-all-of-removed

  • ○

    removed AssistantsApiToolChoiceOption subschema #2 from the tool_choice response property allOf list for the response status 200

    response-property-all-of-removed

  • ○

    removed TruncationObject subschema #2 from the truncation_strategy response property allOf list for the response status 200

    response-property-all-of-removed

  • ○

    added the required property truncation_strategy/type to the response with the 200 status

    response-required-property-added

• Jan 22, 2025bdebcdfcbbde▲11●3○5See the full diff
  • ▲

    added AssistantsApiResponseFormatOption subschema #2 to the response_format request property allOf list

    request-property-all-of-added

  • ▲

    added AssistantsApiToolChoiceOption subschema #2 to the tool_choice request property allOf list

    request-property-all-of-added

  • ▲

    added TruncationObject subschema #2 to the truncation_strategy request property allOf list

    request-property-all-of-added

  • ▲

    the request property response_format became not nullable

    request-property-became-not-nullable

  • ▲

    the request property tool_choice became not nullable

    request-property-became-not-nullable

  • ▲

    the request property truncation_strategy became not nullable

    request-property-became-not-nullable

  • ▲

    removed AssistantsNamedToolChoice subschema #1 from the tool_choice request property oneOf list

    request-property-one-of-removed

  • ▲

    removed ResponseFormatText ResponseFormatJsonObject ResponseFormatJsonSchema subschema #1 from the response_format request property oneOf list

    request-property-one-of-removed

  • ▲

    the truncation_strategy request property type changed from object to no type

    request-property-type-changed

  • ▲

    the truncation_strategy response's property type changed from object to no type for status 200

    response-property-type-changed

  • ▲

    removed the required property truncation_strategy/type from the response with the 200 status

    response-required-property-removed

  • ●

    removed the request property truncation_strategy/last_messages

    request-property-removed

  • ●

    removed the request property truncation_strategy/type

    request-property-removed

  • ●

    removed the optional property truncation_strategy/last_messages from the response with the 200 status

    response-optional-property-removed

  • ○

    added AssistantsApiResponseFormatOption subschema #2 to the response_format response property allOf list for the response status 200

    response-property-all-of-added

  • ○

    added AssistantsApiToolChoiceOption subschema #2 to the tool_choice response property allOf list for the response status 200

    response-property-all-of-added

  • ○

    added TruncationObject subschema #2 to the truncation_strategy response property allOf list for the response status 200

    response-property-all-of-added

  • ○

    removed AssistantsNamedToolChoice subschema #1 from the tool_choice response property oneOf list for the response status 200

    response-property-one-of-removed

  • ○

    removed ResponseFormatText ResponseFormatJsonObject ResponseFormatJsonSchema subschema #1 from the response_format response property oneOf list for the response status 200

    response-property-one-of-removed

• Dec 4, 2024223e7c033ac6○1See the full diff
  • ○

    added the new gpt-4o-2024-11-20 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

• Sep 13, 20244c9e3967c707▲1○1See the full diff
  • ▲

    the request property tools/items/oneOf[subschema #2: FileSearch tool]/file_search/ranking_options/score_threshold became required

    request-property-became-required

  • ○

    the response property tools/items/oneOf[subschema #2: FileSearch tool]/file_search/ranking_options/score_threshold became required for the status 200

    response-property-became-required

• Aug 23, 20245856f8b0c850○2See the full diff
  • ○

    added the new optional request property tools/items/oneOf[subschema #2: FileSearch tool]/file_search/ranking_options

    new-optional-request-property

  • ○

    added the optional property tools/items/oneOf[subschema #2: FileSearch tool]/file_search/ranking_options to the response with the 200 status

    response-optional-property-added

• Aug 6, 20248eca3b09b705▲3○7See the full diff
  • ▲

    removed the enum value none of the request property response_format/oneOf[subschema #1]

    request-property-enum-value-removed

  • ▲

    removed AssistantsApiResponseFormat from the response_format request property oneOf list

    request-property-one-of-removed

  • ▲

    added ResponseFormatText ResponseFormatJsonObject ResponseFormatJsonSchema to the response_format response property oneOf list for the response status 200

    response-property-one-of-added

  • ○

    added the new optional request property tools/items/oneOf[subschema #3: Function tool]/function/strict

    new-optional-request-property

  • ○

    added the new gpt-4o-2024-08-06 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-4o-2024-08-06 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added ResponseFormatText ResponseFormatJsonObject ResponseFormatJsonSchema to the response_format request property oneOf list

    request-property-one-of-added

  • ○

    added the optional property tools/items/oneOf[subschema #3: Function tool]/function/strict to the response with the 200 status

    response-optional-property-added

  • ○

    removed the none enum value from the response_format/oneOf[subschema #1] response property for the response status 200

    response-property-enum-value-removed

  • ○

    removed AssistantsApiResponseFormat from the response_format response property oneOf list for the response status 200

    response-property-one-of-removed

  This revision also has 2 changes that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog

• Jul 17, 202412529f330aab▲2See the full diff
  • ▲

    removed the enum value gpt-4o-mini of the request property model/anyOf[subschema #2]

    request-property-enum-value-removed

  • ▲

    removed the enum value gpt-4o-mini-2024-07-18 of the request property model/anyOf[subschema #2]

    request-property-enum-value-removed

• Jul 15, 2024493a67abde1a○2See the full diff
  • ○

    added the new gpt-4o-mini enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added

  • ○

    added the new gpt-4o-mini-2024-07-18 enum value to the request property model/anyOf[subschema #2]

    request-property-enum-value-added