# Claude Fable 5.1 vs Claude Opus 5.5

As of Oct 14, 2026, Claude Fable 5.1 leads Claude Opus 5.5 in 0 of 9 shared categories.

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

Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.

Claude Fable 5.1: closed weights.

Claude Opus 5.5: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5.1 in General LLM at #2 against #6.
- Which to pick, Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5.1 in Reasoning at #1 against #5.
- Which to pick, Coding: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5.1 in Coding at #1 against #3.
- Which to pick, Coding › Agentic: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5.1 in Coding › Agentic at #1 against #3.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5.1 in Coding › Web dev at #1 against #5.
- Which to pick, Long context: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5.1 in Long context at #1 against #6.
- Which to pick, Vision: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5.1 in Vision at #4 against #6.
- Which to pick, Factuality: As of Oct 14, 2026, Claude Fable 5.1 and Claude Opus 5.5 share #1 in Factuality.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5.5 leads Claude Fable 5.1 in Abstraction (ARC) at #1 against #3.

As of Oct 14, 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 14, 2026, Claude Opus 5.5 is tied for state of the art in Reasoning (since Oct 2, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).