Audit Your Code for the Dead OpenAI Assistants API
The Assistants API shut down on August 26. If any of your automations still call it, they are already failing, and this is a fifteen-minute check to find out.
- Time
- 15 min
- Difficulty
- intermediate
- Potential value
- very-high value
Why today
The shutdown date has already passed. This is not a deadline to plan around. It is a failure that either happened to you over a week ago or did not, and most teams have no monitoring that would tell them which.
What you will do
Determine with certainty whether any code you own still calls the OpenAI Assistants API, and know your migration path before a customer finds the breakage for you.
- 01 Search every repo you own for the Assistants surface, not just the SDK name: grep -rniE 'assistants|thread_|run_|assistant_id|beta\.threads' --include='*.py' --include='*.ts' --include='*.js' --include='*.rb' .
- 02 Search your infrastructure config too, because n8n, Zapier, Make, and low-code tools hide raw HTTP calls to /v1/assistants and /v1/threads that no repo grep will ever find.
- 03 Pull your error logs and dashboards for the window since August 26, 2026 and filter for 404 and 400 responses from api.openai.com. A dead endpoint usually surfaces as a client error, not an outage page.
- 04 For each hit, write down what the automation is supposed to do and who notices when it stops. This is the list that decides your order of work, not the code complexity.
- 05 Read OpenAI's migration guide and map one real assistant to the Responses API plus the Conversations API before touching the rest.
- 06 If you found nothing, record that you checked and the date. A clean audit is only worth something if you can prove you ran it.
How you will know it worked
You can name every place your systems call the Assistants API, or state with evidence from a search and your logs that there are none.
How this was checked
A person wrote this page by hand. Each claim below was checked against the fetched document behind its sources before it published.
Claims checked
-
The OpenAI Assistants API shut down on August 26, 2026.
-
OpenAI directs former Assistants API users to migrate to the Responses API and the Conversations API.
Sources
Research run manual-2026-08-31-assistants-shutdown. Verified Aug 31, 2026.