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Claude Opus 4.5 Timeline - Announcements & Release History | AI Stats

Claude Opus 4.5

Claude Opus 4.5

Claude Opus 4.5

Anthropic

Overview Timeline Benchmarks Providers Quickstart Performance

Model Timeline

05 Feb 2026

Claude Opus 4.6

Future version

24 Nov 2025

Model Released

Model first made available to the public

24 Nov 2025

Model Announced

Model first introduced to the public

05 Aug 2025

Claude Opus 4.1

Previous version