Getting the most out of Opus 5.5 in Claude and Claude Code

How to prompt Opus 5.5, steer a long run, and check your results in Claude apps and Claude Code. Opus 5.5 works well with the way you already use Claude. A few things behave differently, though: it works for longer on its own, it tells you plainly what it did, and it thinks before every reply. This guide covers how to work with Opus 5.5 in Claude apps and Claude Code, including how to prompt the model, steer a long run, and check your results. What to do. Give the whole task in one message.

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