# deepseek-reasoner — Discontinued — shutdown 2026-07-24

For deepseek-reasoner, provider is DeepSeek; lifecycle status is Discontinued; shutdown / retirement date is 2026-07-24; recommended replacement is deepseek-v4-flash; platform / deployment scope is DeepSeek API, recorded from its source on 2026-09-09.

- **Provider:** DeepSeek _(our reading, not quoted from the source)_
- **Model ID / API name:** deepseek-reasoner _(verified: appears in the quote below)_
- **Lifecycle status:** Discontinued
- **Shutdown / retirement date:** 2026-07-24 _(verified: appears in the quote below)_
- **Recommended replacement:** deepseek-v4-flash _(verified: appears in the quote below)_
- **Platform / deployment scope:** DeepSeek API _(our reading, not quoted from the source)_

## What the source says

> 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.

## Source

- https://api-docs.deepseek.com/updates

Last verified: 2026-09-09. Review by: 2026-10-09.
Part of [AI model deprecation and retirement dates by provider](https://referencesource.org/ai-model-deprecation-and-retirement/).