# Claude Fable 5.1 vs Claude Haiku 4.5

As of Oct 15, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in 6 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).

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

Claude Haiku 4.5: $2.0000000000000004 per 1M blended tokens.

Claude Fable 5.1: closed weights.

Claude Haiku 4.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in General LLM at #6 against #133.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Reasoning at #5 against #119.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Coding › Web dev at #5 against #103.
- Which to pick, Long context: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Long context at #6 against #107.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Factuality at #1 against #125.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Abstraction (ARC) at #3 against #78.

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 Haiku 4.5 is ranked #78 in Abstraction (ARC) (since Oct 15, 2026; sources ARC-AGI; methodology v1.0).