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Claude Opus 4.6

Announcements Introducing Claude Opus 4.6 Feb 5, 2026 We’re upgrading our smartest model. The new Claude Opus 4.6 improves on its predecessor’s coding skills. …

Feb 5, 2026

anthropic.com › research › glasswing-initial-update

Project Glasswing: An initial update

… This release includes: The skills custom instructions for repeated work that we and our partners have built and shared; A harness that helps Claude map the codebase, spin up scanning subagents, triage its findings, and write reports; A threat model builder, which maps a codebase to identify potenti… …

May 22, 2026