DeepSeek deepseek-chat / deepseek-reasoner model names discontinued shutdown date

Name: DeepSeek: deepseek-chat / deepseek-reasoner model names discontinued (Shutdown)
Start: 2026-07-24
End: 2026-07-24

The two legacy API model names, deepseek-chat and deepseek-reasoner , will be discontinued in three months (2026-07-24).

R.I.P.killed 86 days ago

Change: Shutdown
Effective: Jul 24, 2026
Replacement: none named; check the source
Source: api-docs.deepseek.com
Vendor's words: The two legacy API model names, deepseek-chat and deepseek-reasoner , will be discontinued in three months (2026-07-24). During the current period, these two model names point to the non-thinking mode and thinking mode of deepseek-v4-flash , respectively.

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