Corroborated event · 6 outlets
Anthropic launched the Claude Sonnet 5.5 model.
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More coverage of this story (5)
Anthropic releases Claude Sonnet 5.5
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'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
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