Sonnet 5.5 — 19:58
Claude Sonnet 5.5 is now available as a faster, lower-cost model for well-scoped tasks, bug fixing, and document, slide, and spreadsheet creation. It scores 70.6% on Terminal-Bench 4.0 versus Sonnet 5’s 10.3%, generates output 30%+ faster, and is priced at $2 per million input tokens and $10 per million output tokens. Developers can use `claude-sonnet-5-5` on the Claude Platform, though thinking-off users must switch to the `between_tools` setting before migrating.