Anthropic Releases Claude Opus 5.5: Fable 5.1 Level Performance, Lower Cost

Core summary

One sentence to understand this update

Anthropic today 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

Claude Opus 5.5 offers a highly attractive upgrade option for developers building AI applications that demand top-tier performance with improved cost-effectiveness.