Migrating off the OpenAI Assistants API before it shuts off (Aug 26, 2026)
Article summary
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On August 26, 2026 OpenAI turns off the Assistants API. /v1/assistants , /v1/threads , and /v1/threads/runs start returning errors that day. There's no grace period and no degraded mode, and OpenAI has said it won't ship a migration tool. Threads don't move over automatically either, so any conversation state you kept server-side is something you have to plan around, not port with a flag. If your code still calls openai.beta.assistants or openai.beta.threads , this is the migration. Here's the…
1Key Takeaways
- On August 26, 2026 OpenAI turns off the Assistants API.
- /v1/assistants , /v1/threads , and /v1/threads/runs start returning errors that day.
- There's no grace period and no degraded mode, and OpenAI has said it won't ship a migration tool.
- Threads don't move over automatically either, so any conversation state you kept server-side is something you have to plan around, not port with a flag.
2AIWedia Score
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3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — AI reports that on August 26, 2026 OpenAI turns off the Assistants API.
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