Sonnet 5.5 is live, and Anthropic made the everyday Claude model faster and cheaper instead of raising the price
Compared with Sonnet 5: → over 30% faster → uses up to 30% fewer tokens on most work → stronger at coding, long tasks, slides, spreadsheets, and design → 80.9%
4/ How to switch today.
Claude Code: update, then /model and pick Sonnet 5.5 - API model id: claude-sonnet-5-5 - Also on AWS, Google Cloud and Microsoft Azure - If you run Sonnet with thinking off, switch to the new between_tools setting first - Haiku 5.5 is still "in the
3/ What early testers measured, as quoted by Anthropic.
Base44, 118 app builds: 3.6 iterations per build. Opus 5 took 7.7 - Balyasny, 2,441 finance tasks: about 121K tokens per answer. Sonnet 5 used 497K - Box: 2.4x faster than Sonnet 5, 12% fewer tokens - Zendesk: support
2/ Same price as Sonnet 5.
Less per task. - $2 per million input tokens, $10 output, $0.20 cache reads - Opus 5.5 is $4 and $20 - Anthropic: up to 30% less per task than Sonnet 5, because it uses fewer tokens - 30%+ faster output - At medium effort it beats Sonnet 5's best
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