Claude Sonnet 5.5 lands in Claude Code: 30% faster, up to 20% lower platform costs
lydiahallie · x · 2026-09-29
Anthropic DX lead Lydia Hallie announced that Sonnet 5.5 is now live in Claude Code.
- Officially smarter, more efficient, and 30% faster than Sonnet 5
- Up to 20% lower costs observed on the Claude Platform
- 30% more usage in Claude Code
- Recommended for well-scoped everyday tasks like bug fixes and quick feature iteration
Related event: Anthropic Launches Claude Sonnet 5.5: Over 30% Faster, Up to 30% Cheaper(58 posts)→
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