api
OpenAI Assistants API
The Assistants API is a deprecated OpenAI API scheduled to shut down on August 26, 2026, with the Responses API documented as the migration path.
Current state
OpenAI Assistants API
OpenAI has deprecated the Assistants API and states that it will shut down on August 26, 2026; existing integrations should migrate to the Responses API.
Last known URL: https://platform.openai.com/docs/assistants/deep-dive
Key facts
- Operator
- OpenAI
- Status
- deprecated
- Entity type
- api
- Country
- United States
- Launched
- 2023
- Ended / changed
- 2026-08-26
- URL status
- live verified
- Last reviewed
- 2026-08-19
Timeline
Dated lifecycle events
- 2025-03-11Assistants API sunset path announcedapi_deprecated
OpenAI documented a sunset path for the Assistants API after feature parity with the Responses API, with a target sunset in the first half of 2026.
- 2025-08-26Assistants API shutdown date set for August 26, 2026shutdown_notice
OpenAI formally deprecated the Assistants API after Responses API feature parity and set August 26, 2026 as the shutdown date, with migration guidance to the Responses API.
Evidence
Source links supporting this record
OpenAI · official_docs · Accessed 2026-06-05
Supports: api_deprecated, sunset_path, current_state
OpenAI · official_docs · Accessed 2026-08-19
Supports: api_deprecated, shutdown_notice, replacement_guidance, current_state
OpenAI · official_support · Accessed 2026-08-19
Supports: api_deprecated, shutdown_notice, replacement_guidance, current_state
Known unknowns
- Shutdown is scheduled for August 26, 2026; final removal should be rechecked after that date.
Correction path
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