Claude Opus 5.5 Released, Matches Fable 5.1 Performance at Lower Cost

Core summary

One sentence to understand this update

Anthropic has officially launched Claude Opus 5.5, the first model in the Claude 5.5 family, which performs at the level of Claude Fable 5.1 for most tasks while costing 40% less to run than Opus 5.

Impact & opportunity

What this could mean

Builders should immediately evaluate Claude Opus 5.5 to leverage its superior cost-performance, significantly reducing AI application operating costs while maintaining high performance.