Opus 5.5 combines stronger work with lower pricing

Anthropic introduced Claude Opus 5.5, the first member of its 5.5 family. The company reports performance comparable to Fable 5.1 on much professional work, lower typical operating costs than Opus 5, and improvements in its behavioral audit. The release includes safeguards for advanced capabilities.

Context

Performance, cost, and behavior are separate dimensions. A model that handles a difficult task still needs to stay within the authority it was given and communicate what it did. The most useful comparison includes the quality of its decisions and the ease of reviewing the finished work.