Claude Sonnet 5.5:
30% faster.
Up to 30% cheaper.
If AI keeps getting better while getting cheaper…
What happens to the cost of building software?
Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family.
It’s a clear upgrade over Sonnet 5, runs more than 30% faster, and costs up to 30% less for most work.