AnthropicAI's Claude Opus 5.5 is now generally available in GitHub Copilot.

Our early testing shows it stands out in efficiency, delivering task resolution comparable to Claude Opus 5 while using significantly fewer steps and tokens, with fast error recovery on multistep

GitHubSep 22117

Opus 5.5 vs Opus 5 (1M)

Both were given the same prompt & /goal, to redesign a sloppy app. which one did it better?

jaiminSep 224

We are heading the right way AnthropicAI

We need cheaper AI; They are better now Opus 5.5 costs 40% less than Opus 5, and is the same level as Fable 5.1

Lucas RodriguesSep 22

"Opus 5.5 performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5."

Doran.artisan.cashSep 2229