Claude Opus 5.5 as Default Model

Opus 5.5 is now the default model in Claude on Pro, Max, Ultra, and Team plans.

Anthropic says Opus 5.5 follows instructions closely and stays in scope, so documents and spreadsheets need less editing, and it is more careful with figures and sources.
Medium effort is now the default setting, and Anthropic says it matched or beat Opus 5 at High effort on its evaluations.
In an internal merger-model test, Opus 5.5 took 63 minutes versus 93 for Opus 5, at half the cost. These are Anthropic's own results, not independent benchmarks.
API pricing is $4 per million input tokens and $20 per million output tokens.

Everyday knowledge work such as documents, spreadsheets, financial analysis, and long multi-part tasks.

You start a new chat in Claude and want to know which model you are on without opening the model picker.

Pro, Max, Ultra, and Team plan users, especially those who build reports and models.

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