Corroborated event · 6 outlets
Anthropic launched the Claude Sonnet 5.5 model.
AI brief
Anthropic released Claude Sonnet 5.5, the second model in its Claude 5.5 family. It generates output more than 30 percent faster, costs up to 30 percent less per task, and nearly matches Opus 5.5 on knowledge-work benchmarks.
Why it matters: It offers performance close to Anthropic's higher-end Opus 5.5 at a lower cost per task.
Written by AI from The Decoder's published text.
Background
From our own funding, model and news trackers, not from the source.
Anthropic
- Latest funding
- Growth · $65B · 28 May 2026
- Newest model on the API
- Claude Haiku 5.5 · 7 Oct 2026 · $0.1 in / $0.5 out per million tokens
More coverage of this story (5)
Anthropic releases Claude Sonnet 5.5
Claude Sonnet 5.5 just launched — here's why it's about to become your daily driver
Tom's Guide AI · 29 Sept 2026, 06:45
Claude Sonnet 5.5
Simon Willison's Weblog · 28 Sept 2026, 22:07
Introducing Claude Sonnet 5.5 on AWS
AWS Machine Learning Blog · 28 Sept 2026, 18:57
Anthropic debuts Claude Sonnet 5.5 running 30% faster than the previous-generation AI model
SiliconANGLE AI · 28 Sept 2026, 18:00
Anthropic releases Sonnet 5.5, which it calls a significantly cheaper, faster work partner
TechCrunch AI · 28 Sept 2026, 18:00
Primary source
“Anthropic has released Claude Sonnet 5.5, the second model in its Claude 5.5 family. It generates output more than 30 percent faster, costs up to 30 percent less per task, and nearly matches Opus 5.5 on knowledge-work benchmarks.”
Reporting from a publisher outside the organisation being covered.
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