Introducing Claude Opus 5.5
We’re introducing Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5.
TL;DR
- Claude Opus 5.5 is introduced as the first model in the new Claude 5.5 family.
- It achieves performance comparable to Claude Fable 5.1 for most tasks.
- The cost to run Claude Opus 5.5 is 40% less than Opus 5.