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simon_willison · Jun 30, 2026 · news
Source brief
What's new in Claude Sonnet 5
simonwillison.netJun 30, 2026
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In brief
What's new in Claude Sonnet 5 Claude Sonnet 5 came out this morning . I always head straight for the "what's new" developer docs because they tend to have more actionable information than the official announcement pos...
