# Claude Fable 5.1 vs Claude Opus 4.6

As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 4.6 in 3 of 6 shared categories: Math, Coding › Web dev, and Factuality.

Claude Fable 5.1: $20 per 1M blended tokens.

Claude Opus 4.6: $10 per 1M blended tokens.

Claude Fable 5.1: closed weights.

Claude Opus 4.6: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Fable 5.1 in General LLM at #4 against #6.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Fable 5.1 in Reasoning at #2 against #5.
- Which to pick, Math: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 4.6 in Math at #2 against #11.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 4.6 in Coding › Web dev at #5 against #35.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Fable 5.1 in Long context at #2 against #6.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 4.6 in Factuality at #1 against #3.

As of Oct 15, 2026, Claude Fable 5.1 is tied for state of the art in Factuality (since Oct 2, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 15, 2026, Claude Opus 4.6 is near state of the art, rank #2 in Reasoning (since Oct 15, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).