Claude Opus 5.5 Released: Fable 5.1 Performance, 40% Cheaper

Core summary

One sentence to understand this update

Anthropic has launched Claude Opus 5.5, the inaugural model in the Claude 5.5 family, delivering performance akin to Claude Fable 5.1 while cutting running costs by 40% compared to Opus 5.

Impact & opportunity

What this could mean

This release offers builders a high-performance, cost-effective option for demanding AI tasks, enabling more ambitious projects with significant budget savings.