OfficialSep 28, 2026 ·
Claude Sonnet 5.5 is now available:
AnthropicAnthropic on X, Cursor on X and Cognition on X reported this on Sep 28, 2026.
Published
Sep 28, 2026
Reported by
3 outlets
Source
The company itself
Reported by: Anthropic on X, Cursor on X, Cognition on X
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