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Claude Opus 4

Anthropic · Claude Opus line · flagship

Released May 22, 2025Replaced by Claude Opus 4.1

Claude Opus 4 was released by Anthropic on May 22, 2025, as a flagship model in the Claude Opus line.

No detailed card for this model: we only add numbers published by the maker or by independent benchmarks. Sources: Anthropic

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Where the Claude Opus line stands

Claude Opus 5.5 is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.

Claude Opus

Anthropic · flagship line

Latest: Claude Opus 5.5 · Sep 22, 2026

Mid-cycle32 days since the last release · usual gap 60 days

Anthropic's new Opus scores 7 points higher than Opus 5 on the all-round index and costs 20% less per token.

What changed in Claude Opus 5.5 →
Days since last release
32
days
Usual gap
60
days
Recent gaps
Claude Opus 5.5 · Sep 2026
60
Claude Opus 5 · Jul 2026
57
Claude Opus 4.8 · May 2026
42
Claude Opus 4.7 · Apr 2026
70

Every Claude Opus release

Newest first. See the full line with every card →

  1. Sep 22, 2026Claude Opus 5.5
  2. Jul 24, 2026Claude Opus 5
  3. May 28, 2026Claude Opus 4.8
  4. Apr 16, 2026Claude Opus 4.7
  5. Feb 5, 2026Claude Opus 4.6
  6. Nov 24, 2025Claude Opus 4.5
  7. Aug 5, 2025Claude Opus 4.1
  8. May 22, 2025Claude Opus 4 · this page
  9. Mar 4, 2024Claude 3 Opus
  10. Nov 21, 2023Claude 2.1
  11. Jul 11, 2023Claude 2