#sonnet-4-6

Anthropic announced Claude Opus 4.6 and Sonnet 4.6 on February 18, 2026. The release emphasizes coding performance, longer-context stability, and new dynamic threat prevention controls for enterprise deployment.

Anthropic announced Claude Sonnet 4.6 on February 17, 2026, positioning it as a full upgrade across coding, computer use, and long-context reasoning. The model becomes default for Free/Pro users and keeps Sonnet 4.5 API pricing at $3/$15 per million tokens.