OpenAI Assistants API: Shutting Down
What happened
OpenAI deprecated the Assistants API (announced August 26, 2025); endpoints stop working entirely on August 26, 2026.
What to do before the deadline
Developers: migrate to the Responses API + Conversations API before the cutoff — OpenAI provides a migration guide (Assistants → Prompts, Threads → Conversations, Runs → Responses) but no automated tool.
What to use instead
Looking for a developer / api replacement? Tools LegitTool has profiled include Jasper , Copy.ai , QuillBot . Whatever you pick, run it through our trust check first, and browse our reviews to see who actually stands behind it.
Frequently asked questions
Is OpenAI Assistants API shut down?
OpenAI Assistants API is scheduled to shut down on August 26, 2026. OpenAI deprecated the Assistants API (announced August 26, 2025); endpoints stop working entirely on August 26, 2026.
Can I get a refund from OpenAI Assistants API?
Based on the verified source: no paid plan affected. Developers: migrate to the Responses API + Conversations API before the cutoff — OpenAI provides a migration guide (Assistants → Prompts, Threads → Conversations, Runs → Responses) but no automated tool.
How do I get my data out of OpenAI Assistants API?
Developers: migrate to the Responses API + Conversations API before the cutoff — OpenAI provides a migration guide (Assistants → Prompts, Threads → Conversations, Runs → Responses) but no automated tool.
What can I use instead of OpenAI Assistants API?
Reviewed alternatives include Jasper, Copy.ai, QuillBot. Vet any replacement with our trust check before paying.
Source
OpenAI deprecations page ↗ — every entry on this tracker is verified against its source before publishing.
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