Perplexity
/async/chat/completions* endpoint removal
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Perplexity removed the /async/chat/completions* endpoints on September 27, 2026. Calls to /async/chat/completions* fail since that day, as asynchronous Sonar requests are no longer supported. Any traffic sent to these endpoints now results in an error.
Calls it hits
/async/chat/completions*
What to use instead of these calls
Submit an Agent API request using POST /v1/agent with background: true and poll the response by id.
In Perplexity's words
Asynchronous Sonar requests are not reformulated and are no longer supported
Facts
- API
- Perplexity
api.perplexity.ai - Kind
- Endpoint removal
- Takes effect
- September 27, 2026
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
- Verified
- , against Perplexity's own pages
Questions
When does this change take effect?
Calls to /async/chat/completions* on Perplexity stopped working on September 27, 2026.
What happens to calls after September 27, 2026?
They have failed since September 27, 2026.
How do I find the calls this hits in my code?
Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.
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You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.