🪦 Dead
Claude Sonnet 4 & Opus 4
Model deprecation · Model Deprecation · shut down June 15, 2026
- Born
- Died
- Lifespan
- 1y
- Cause of death
- Model Deprecation
- Killed by
- Anthropic
- Type
- Model
Anthropic's flagship Claude 4 generation, Sonnet 4 and Opus 4, launched together on May 22, 2025 and retired together 389 days later. Deprecation was announced April 14, 2026, and calls to claude-sonnet-4-20250514 and claude-opus-4-20250514 have returned errors since June 15. Anthropic points users to claude-sonnet-4-6 and claude-opus-4-8. Amazon Bedrock kept Sonnet 4 running for another 121 days, until its end of life on October 14, 2026.