🪦 Dead
Claude 3.7 Sonnet
Model deprecation · Model Deprecation · shut down February 19, 2026
- Born
- Died
- Lifespan
- 1y
- Cause of death
- Model Deprecation
- Killed by
- Anthropic
- Type
- Model
Anthropic's first model with hybrid 'extended thinking': it could reason step-by-step for up to 128K tokens before answering, and it posted the best scores yet on SWE-Bench coding benchmarks at launch. Deprecated on October 28, 2025, eight months after release, and retired from Anthropic's API on February 19, 2026, five days short of its first birthday, as the Claude 4 family made extended thinking standard across the lineup. Google Cloud kept serving it until May 11, 2026.