Version history

Every shipped version of this model. Click a marker to open its release page.

3 - Mar 434 - May 2244.1 - Aug 54.14.6 - Feb 54.624.7 - Apr 16 4.8 - May 28 Zoom in to separate2 releases5 - Jul 2455.5 - Sep 225.52024 Q22024 Q32024 Q42025 Q12025 Q22025 Q32025 Q42026 Q12026 Q22026 Q32026 Q4

Claude Opus

byAnthropic

Anthropic's most capable model for complex reasoning, coding, and agentic tasks.

Latest version:5.5Released

All Versions

Claude Opus 5.5

Released
Released on September 22, 2026

Claude Opus 5

Released
Released on July 24, 2026

Claude Opus 4.8

Released
Released on May 28, 2026

Claude Opus 4.7

Released
Released on April 16, 2026

Claude Opus 4.6

Released
Released on February 5, 2026

Claude Opus 4.1

Released
Released on August 5, 2025

Claude Opus 4

Released
Released on May 22, 2025

Claude Opus 3

Released
Released on March 4, 2024