deepseek-reasoner model retirement
Stopped workingSubscribe to DeepSeekShare
DeepSeek discontinued the legacy model deepseek-reasoner on July 24, 2026. Calls specifying model deepseek-reasoner fail since that date. The change was announced on April 24, 2026, stating that the model would be discontinued.
What to use instead of deepseek-reasoner
Move to deepseek-flash. The model deepseek-v4-flash is answered by a newer model already.
In DeepSeek's words
The two legacy API model names, deepseek-chat and deepseek-reasoner, will be discontinued in three months (2026-07-24).
Facts
- API
- DeepSeek
api.deepseek.com - Model
deepseek-reasoner- Released
- December 1, 2025 (models.dev)
- Kind
- Model retirement
- Announced
- April 24, 2026
- Takes effect
- July 24, 2026
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
- Verified
- , against DeepSeek's own pages
Questions
When does deepseek-reasoner shut down?
Calls to the model deepseek-reasoner stopped working on July 24, 2026.
What happens to calls after July 24, 2026?
They have failed since July 24, 2026.
When was deepseek-reasoner released?
deepseek-reasoner was released on December 1, 2025, according to models.dev.
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.
More from DeepSeek 2
-
deepseek-chatModel retirement Stopped working -
No date
deepseek-v4-flash-vision-expModel retirement Deprecated, no date
You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.