@bcherny: Sonnet 5.5 fixing a bug with Claude Code. 30% faster and 30% less usage.
Summary
Claude has released Sonnet 5.5, a faster and more cost-effective upgrade over Sonnet 5 that fixes a bug with Claude Code.
View Cached Full Text
Cached at: 09/28/26, 11:37 PM
Sonnet 5.5 fixing a bug with Claude Code.
30% faster and 30% less usage. https://t.co/Vt1K1ubcFd
Claude (@claudeai): Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family.
It’s a clear upgrade over Sonnet 5, runs more than 30% faster, and costs up to 30% less for most work.
Similar Articles
@rohanpaul_ai: Claude Sonnet 5.5 is out and it scores 70.6% on Terminal-Bench 4.0, up from Sonnet 5's 10.3%, at unchanged prices. Over…
Claude Sonnet 5.5 is released by Anthropic, offering major improvements in benchmark scores, cost efficiency, and speed compared to Sonnet 5, with a 70.6% score on Terminal-Bench 4.0.
@claudeai: Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family. It’s a clear upgrade over Sonnet 5, runs more…
Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family, which is a clear upgrade over Sonnet 5 with over 30% faster performance and up to 30% cost reduction.
What's new in Claude Sonnet 5
Anthropic released Claude Sonnet 5, a model with performance near Opus 4.8 at lower prices, but featuring a new tokenizer that increases token counts for English and code by ~30%, effectively raising costs.
Claude Sonnet 5.5
Anthropic released Claude Sonnet 5.5, which is 30% faster and cheaper while beating benchmarks, and it is now the free tier model on claude.ai.
Sonnet 5.5
Claude Sonnet 5.5 is introduced as a faster, lower-cost AI model in the Claude 5.5 family, offering significant improvements in performance, speed, and efficiency for everyday tasks and collaboration.