Claude Sonnet 5.5 stealth rollout: release near — Alex Getman

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Alex Getman @alexgetmancom · 28 Sep 2026, 14:43 UTC · Updated 31 Oct 2026, 20:59 UTC

Claude Sonnet 5.5 is already rolling out in stealth. A lot of users, including free users, are being routed to it.

The release is very close.

Screenshot of a chat with Claude, where a user asks about Tibo, and Claude replies that it's Thibault Sottiaux from OpenAI. At the bottom, the model selection shows Sonnet 5 Medium, underlined in red.

Claude Anthropic Claude

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