Corroborated event · 6 outlets
Anthropic launched the Claude Sonnet 5.5 model.
AI brief
Anthropic released a new Sonnet model, Claude Sonnet 5.5, which it says runs 30%+ faster and costs up to 30% less for most work.
Why it matters: It is priced the same as Sonnet 5 while reportedly beating it on every benchmark and being cheaper to run.
Written by AI from Simon Willison's Weblog'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
Introducing Claude Sonnet 5.5 on AWS
AWS Machine Learning Blog · 28 Sept 2026, 18:57
Anthropic's Claude Sonnet 5.5 nearly matches Opus 5.5 on benchmarks while costing up to 30 percent less per task
The Decoder · 28 Sept 2026, 18:02
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
“Claude Sonnet 5.5 New Sonnet model from Anthropic today. They say it "runs 30%+ faster, and costs up to 30% less for most work" - it's priced the same as Sonnet 5 but appears to beat it on every benchmark, and should be cheaper to run as well.”
Interpretation or community commentary rather than straight reporting.
Read original story ↗