Anthropic just released Sonnet 5.5 🚀

→ 30%+ faster than Sonnet 5. → Same price ($2/$10 per million tokens). → Nearly level with Opus 5.5 on real-world work tests, at half the price. → First Sonnet to beat Pokémon Red from screenshots alone

There's An AI For ThatSep 283

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%

IsrafilSep 289

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

Parker RexSep 281

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

Parker RexSep 281