Claude Opus 5.5: Higher performance, stronger safety, and lower cost
Summary
Anthropic announces Claude Opus 5.5, the first model in the Claude Opus 5.5 family. It claims performance on par with Claude Fable 5.1 for most tasks at about 40% lower run cost than Opus 5, along with safety improvements and expanded verification programs. Availability spans AWS, Google Cloud, and Microsoft Azure, with pricing details and benchmark results across coding, knowledge work, and business workflows.