Extended Thinking Models
15 models with verified extended thinking capability across 7 providers
15Extended Thinking models
7Providers
21Also have capability_text
sourc.dev tracks 15 AI models with verified Extended Thinking capability across 7 providers. Extended Thinking is one of the most tracked capabilities in the AI ecosystem. 21 of these models also have capability_text — the most common companion capability among Extended Thinking models. All data sourced directly from vendor documentation and verified primary sources. Updated with every platform build.
All Extended Thinking models — 15 tracked
| Tier | Model |
|---|---|
| 1 | Claude Opus 4 |
| 1 | Claude Sonnet 4 |
| 1 | DeepSeek R1 |
| 1 | DeepSeek V3.2 |
| 1 | GPT-5 |
| 1 | GPT-5 mini |
| 1 | Grok 4 |
| 1 | Grok 4.1 |
| 1 | Grok 4.1 Fast |
| 1 | Kimi K2.5 |
| 1 | o1 |
| 1 | o3 |
| 1 | o4-mini |
| 1 | Qwen3 235B A22B |
| 1 | Step 3.5 Flash |