Anthropic Prepares Claude Sonnet 5.5 Upgrade With Performance and Coding Improvements

Anthropic is preparing to replace Sonnet 5 with Claude Sonnet 5.5, which it describes as its most powerful mid-sized model.

The planned update brings improvements in performance and speed, alongside enhanced capabilities in design and programming.

The focus on design and coding puts those tasks at the centre of the upgrade, broadening its scope beyond faster responses alone.

Sonnet 5.5 is positioned as a successor within Anthropic’s mid-sized model range. The announcement outlined in the summary did not specify a release date or provide benchmarks to quantify the improvements.