Opus 5.5 is the model for people who do actual work: build products, write code. - It's good from low effort to max. Higher effort goes deeper, not wider. Lower effort leaves space for you to fill in, which I love. - It uses fewer tokens than the last Opus and doesn't run in circles like Opus 5 did. - It's easier to steer than Fable in some cases. - It can run for a long time, but in-the-loop work is where it feels special. I think this is the model that brings the next wave of people into…

Claude@claudeai3h ago

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.