AI summarized from verified sources
OpenAI Updates Assistants API Migration Guide with Sunset Date
Existing Assistants API users can plan a safe migration before the shutdown.
SOURCE CHECK
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Sources
Key Points
- 1Assistants API deprecated with a clear shutdown date
- 2Responses API recommended as functionally equivalent replacement
- 3Concepts reorganized from Assistants/Threads/Runs to new model
- 4New implementations should use Responses API from the start
OpenAI has deprecated the Assistants API and published a migration guide to the Responses API. The Assistants API will be discontinued on August 26, 2026, requiring existing users to transition. Developers must adapt conversation and tool invocation concepts to the new API.
What changed
OpenAI has deprecated the Assistants API and published a migration guide to the Responses API. The Assistants API will be discontinued on August 26, 2026, requiring existing users to transition. Developers must adapt conversation and tool invocation concepts to the new API.
Why it matters
Existing Assistants API users can plan a safe migration before the shutdown.
What to watch
Existing Assistants API users can plan a safe migration before the shutdown. Key checks: Assistants API deprecated with a clear shutdown date / Responses API recommended as functionally equivalent replacement / Concepts reorganized from Assistants/Threads/Runs to new model.