# Claude Opus 4.1 vs Claude Opus 5

As of Oct 15, 2026, Claude Opus 4.1 leads Claude Opus 5 in 0 of 6 shared categories.

Claude Opus 4.1: $29.999999999999996 per 1M blended tokens.

Claude Opus 5: $10 per 1M blended tokens.

Claude Opus 4.1: closed weights.

Claude Opus 5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in General LLM at #11 against #73.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Reasoning at #9 against #60.
- Which to pick, Science: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Science at #12 against #83.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Coding › Web dev at #6 against #84.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Long context at #9 against #52.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Opus 5 leads Claude Opus 4.1 in Factuality at #4 against #93.

As of Oct 15, 2026, Claude Opus 4.1 is a former state-of-the-art holder in General LLM (since Aug 18, 2025; sources LMArena Text (style-controlled, overall); methodology v1.0).

As of Oct 15, 2026, Claude Opus 5 is near state of the art, rank #4 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).