Claude Opus 5.5 Released: Fable 5.1 Performance at 40% Lower Cost

Core summary

One sentence to understand this update

Anthropic has released Claude Opus 5.5, offering performance comparable to Claude Fable 5.1 for most tasks, with a 40% reduction in running cost compared to Opus 5.

Impact & opportunity

What this could mean

Builders can now access top-tier model performance at a significantly reduced cost, making advanced AI capabilities more accessible and economically viable for a wider range of applications.