NEW: Anthropic launches Claude Opus 5.5, its latest flagship model for coding and knowledge work

With performance near Fable 5.1 levels on most tasks. The model costs $4/M input and $20/M output tokens, with typical workloads 40% cheaper than Opus 5.

Crypto BriefingSep 222

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