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Claude Opus 4.5

Anthropic releases Claude Opus 4.5 as a top-tier model, alongside updates to Claude’s developer platform and apps.

Model Release

What Happened

Anthropic announced Claude Opus 4.5 and described simultaneous updates across its product ecosystem (developer platform, Claude Code, and consumer apps).

Why It Matters

Opus releases often serve as “capability ceilings” that downstream tools and workflows target, especially for complex reasoning and long-horizon work.

Technical Details