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The post is dated "Feb 24, 2025": "Today, we're announcing Claude 3.7 Sonnet" and it "is now available on all Claude plans"; TechCrunch[4] says it "is rolling out to all users and developers on Monday" (24 February).Anthropic releases Claude 3.7 Sonnet, the first hybrid reasoning model, which answers instantly or thinks step by step for as long as the user allows, and launches the Claude Code terminal agent beside it.
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