• Remove deprecated prompt_cache_breakpoint fields from tool definitionslatestOpenAPI 3.1.0●55690521b2026-08-29 01:36
• Add new webhooks for safety alert notificationsOpenAPI 3.1.0○26c8481c2026-08-28 23:57
• Add prompt_cache_breakpoint property to tool definition objectsOpenAPI 3.1.0○552929dd82026-08-28 07:12
• Add compute_units field to token usage objectsOpenAPI 3.1.0○2617210102026-08-27 14:51
• Add new tenant trusted access webhook event typesOpenAPI 3.1.0●2○2ecbf3ac2026-08-27 02:18
• Add optional 'id' field to CompactionTriggerItemParam schemaOpenAPI 3.1.0○261665a182026-08-26 01:12
• Deprecate geography field in project schema in favor of residencyOpenAPI 3.1.0○2a0a969c2026-08-24 16:19
• Add 'residency' field for project data residency configurationOpenAPI 3.1.0●2○6f85dbe22026-08-21 20:48
• Add quantity_unit field to organization costs resultsOpenAPI 3.1.0○1113c6a942026-08-21 19:40
• Clarify transparent background support for GPT image modelsOpenAPI 3.1.0no API changes010421d2026-08-20 20:46
• Clarify variable length of output audio deltas in translation eventOpenAPI 3.1.0no API changesb0da4ea2026-08-20 19:17
• Add chatgpt-image-latest as a new image generation model optionOpenAPI 3.1.0no API changese68e9be2026-08-20 19:03
• Add gpt-image-2 models to image generation and editing APIsOpenAPI 3.1.0●232○48b8d775d2026-08-20 01:22
• Add obfuscation field to chat completion chunk responsesOpenAPI 3.1.0○15fd39db2026-08-19 14:43
• Increase max length for encrypted_content in compaction summariesOpenAPI 3.1.0▲18○806a94042026-08-19 14:07
• Add new event type for ads account onboarding redemptionOpenAPI 3.1.0●1○121864212026-08-15 01:35
• Add new streaming events for shell command execution and outputOpenAPI 3.1.0○29b457ac2026-08-15 00:16
• Add image metadata fields to partial image data responsesOpenAPI 3.1.0○82329a662026-08-14 22:24
• Add metadata field to chat completion responseOpenAPI 3.1.0○4b6c1bec2026-08-14 21:35
• Remove deprecated string error type from tool call responsesOpenAPI 3.1.0▲8○47c0946472026-08-14 20:50
• Add shutdown_date field to model objectOpenAPI 3.1.0○223e6f5b2026-08-14 18:51
• Add 429 Too Many Requests response to all endpointsOpenAPI 3.1.0○161ca342042026-08-14 15:22
• Add ResponseWsError event for WebSocket error reportingOpenAPI 3.1.0no API changesaa588812026-08-14 14:10
• Clarify handling of reasoning item content in streaming responsesOpenAPI 3.1.0no API changes061d7d02026-08-14 02:22
• Allow null annotations and update example annotation typeOpenAPI 3.1.0▲2○2a2726e02026-08-14 00:37
• Add detailed token usage fields and structured error schemasOpenAPI 3.1.0○737348a532026-08-14 00:20
• Add external_web_access flag to control live web search accessOpenAPI 3.1.0●75○172c6d56282026-08-13 19:38
• Add service_tier property to responses with new enum and documentationOpenAPI 3.1.0●21○22855e5d42026-08-13 19:31
• Clarify file content endpoint response and add new GPT-5.5 modelsOpenAPI 3.1.0●54○139382a832026-08-13 19:24
• Add descriptions to ResponseStreamEvent and BetaResponseStreamEventOpenAPI 3.1.0no API changesbc61c522026-08-13 19:21
• Add `stream_id` to responses WebSocket events for routing controlOpenAPI 3.1.0○101e5b3b12026-08-13 18:57
• Mark video-related endpoints as deprecatedOpenAPI 3.1.0●1○11f6a8e2f2026-08-13 18:51
• Add tenant.workload_identity.access_token.issued event to APIOpenAPI 3.1.0●1○111854ae2026-08-12 15:43
• Clarify audio file requirements for transcription and translationOpenAPI 3.1.0no API changes577fa922026-08-11 03:47
• Add new AI model options to the API specificationOpenAPI 3.1.0●54○129c8e1212026-08-10 17:26
• Add new AI model options to the API specificationOpenAPI 3.1.0●55○129c8e1212026-08-10 17:26
• Remove deprecated 'source' field from audit log schemaOpenAPI 3.1.0●191e7c952026-08-10 15:50
• Add 'source' field to audit log actions for authorization contextOpenAPI 3.1.0○1c309ca12026-08-08 00:35
• Add 'source' field to audit log actions for authorization contextOpenAPI 3.1.0○1c309ca12026-08-08 00:35
• Allow call_id to be nullable and remove from required fieldsOpenAPI 3.1.0▲101○24dc708bb2026-08-05 00:59
• Allow call_id to be nullable and remove from required fieldsOpenAPI 3.1.0▲239●318○1786dc708bb2026-08-05 00:59
• Remove minimum length constraint from namespace description fieldsOpenAPI 3.1.0▲116○21466c74a2026-08-04 19:53
• Add gpt-5.5 model as a selectable optionOpenAPI 3.1.0●18○5d4fb7062026-08-03 16:38
• Add endpoint to check content for OpenAI provenance signalsOpenAPI 3.1.0○1117ce562026-07-31 15:40
• Add name and namespace fields to function tool call outputsOpenAPI 3.1.0○110ef05a7d2026-07-30 21:54
• Add 'fast' service tier and rename conversation schemasOpenAPI 3.1.0○400410f5a2026-07-30 20:35
• Add 'fast' service tier option to service_tier parameterOpenAPI 3.1.0●23○3d2f04802026-07-30 17:08
• Add new transcription models with multi-language and keyword supportOpenAPI 3.1.0●8○29db14b6e2026-07-28 20:57
• Add live.call.incoming webhook event for live SIP session acceptanceOpenAPI 3.1.0○1b9fc3bc2026-07-27 19:23
• Add organization and project hard spend limit management endpointsOpenAPI 3.1.0○65c044be2026-07-23 15:27

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