I am really really enjoying Claude 5.5 Opus after extensively using it the last several hours across UI, content/copy, and deep refactoring. Feels significantly better than Fable 5.1 which continously thrashed on context window.
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 for most tasks, and costs 40% less to run than Opus 5.