# Claude Fable 5.1 vs GPT-5.5

As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5.5 in 7 of 7 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).

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

GPT-5.5: $11.25 per 1M blended tokens.

Claude Fable 5.1: closed weights.

GPT-5.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5.5 in General LLM at #6 against #22.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5.5 in Reasoning at #5 against #26.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5.5 in Coding › Web dev at #5 against #48.
- Which to pick, Long context: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5.5 in Long context at #6 against #26.
- Which to pick, Vision: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5.5 in Vision at #6 against #10.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5.5 in Factuality at #1 against #5.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5.5 in Abstraction (ARC) at #3 against #7.

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, GPT-5.5 is near state of the art, rank #5 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).