Anthropic Claude Update Version Claude Sonnet 5.5
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Update Summary
Claude Sonnet 5.5 launches as a faster, lower-cost successor to Claude Sonnet 5, with stronger coding, collaboration, and knowledge-work performance. It also introduces new cyber safeguards, preserved thinking changes, and a migration note for users running Sonnet with thinking off.
Update Details
Security
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New Features
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Known Issues
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Hints
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Product Information
Vendor: Anthropic
Product: Claude
Product type: Other
Platform: Web
Version: Claude Sonnet 5.5
Vendor information published: Sep 28, 2026
Original release notes: View on vendor site
Published on updatealert.io: Sep 30, 2026
Description: AI assistant for drafting, analysis, coding, and enterprise workflows.