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.
React 19.3 is now available!
This release makes View Transitions and Fragment Refs stable, and adds browser(), Trusted Types support, and Context in Server Components.
https://t.co/4BArkyfaYN