Claude Code makes Opus 5.5 the default on Pro and Team Standard
Claude Code v2.1.280 changes the default model on Pro and Team Standard plans from Sonnet to Opus. The release identifies Opus 5.5 as the new default Opus model.
SessionWatcher editorial · Published · Updated · Source announcement: 2026-09-22
Related guide: How to check your Claude Code usage
Opus 5.5 becomes the default Opus model
Claude Code v2.1.280 adds Claude Opus 5.5 and names it the default Opus model. The release also lists 1M context and API token prices, but does not specify a release date for the model beyond the release notes’ publication date.
Sources: v2.1.280
Default changes on Pro and Team Standard
The release changes the default model on Pro and Team Standard plans from Sonnet to Opus, aligning those plans with Max, Team Premium, and Enterprise. The note does not say whether users can select a different default or describe any change to plan usage limits.
Sources: v2.1.280
AI assisted reporting, checked against the linked official sources. Source pages checked 2026-10-03. Editorial process and corrections.