Claude Fable 5.1 vs Claude Haiku 4.5
As of Oct 14, 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
Yes. SOTA in co-SOTA in Factuality.
Claude Haiku 4.5
#78 Best recorded rank: #78 in Abstraction (ARC), as of Oct 14, 2026.
| Category | Claude Fable 5.1 | Claude Haiku 4.5 |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #104 · #104 in General LLM Margin 70.74829931972789 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | #91 · #91 in Reasoning Margin 63.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #2 · Near-SOTA · Math Margin 2.2222222222222285 Epoch AI benchmarking hub · Sep 1, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | — | #109 · #109 in Science Margin — Epoch AI benchmarking hub · Oct 15, 2025 |
| Coding | #3 · Near-SOTA · Coding Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 |
| Coding › Agentic | #3 · Near-SOTA · Coding › Agentic Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #5 · Near-SOTA · Coding › Web dev Margin 3.738317757009341 LMArena leaderboard dataset · Oct 13, 2026 | #92 · #92 in Coding › Web dev Margin 85.04672897196262 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #6 · Was SOTA · Long context Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #84 · #84 in Long context Margin 57.142857142857146 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #6 · #6 in Vision Margin 18.421052631578945 Epoch AI benchmarking hub · Sep 1, 2026 | — |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #97 · #97 in Factuality Margin 73.13432835820896 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 1, 2026 | #78 · #78 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Oct 15, 2025 |
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.
General LLM: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in General LLM at #6 against #104.
Reasoning: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Reasoning at #5 against #91.
Coding › Web dev: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Coding › Web dev at #5 against #92.
Long context: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Long context at #6 against #84.
Factuality: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Factuality at #1 against #97.
Abstraction (ARC): As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Abstraction (ARC) at #3 against #78.
Claude Fable 5.1 · Claude Haiku 4.5
Claude Fable 5.1 or Claude Haiku 4.5?
As of Oct 14, 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 or Claude Haiku 4.5 for General LLM?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in General LLM at #6 against #104.
Claude Fable 5.1 or Claude Haiku 4.5 for Reasoning?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Reasoning at #5 against #91.
Claude Fable 5.1 or Claude Haiku 4.5 for Coding › Web dev?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 4.5 in Coding › Web dev at #5 against #92.