Anthropic’s Sonnet 5.5 Ships Safety as a Feature. A Federal Court Just Called It a Liability.
On September 28, 2026, Anthropic released Claude Sonnet 5.5, the second model in its latest family and a clear upgrade over its predecessor. The model runs 30%+ faster, costs up to 30% less per task, and maintains the same pricing – $2 per million input tokens, $10 per million output tokens. In agentic coding, the…