Claude Fable 5.1 vs Claude Haiku 5.5
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 5.5 in 2 of 2 shared categories: Math and Coding › Web dev.
Claude Fable 5.1
Yes. SOTA in co-SOTA in Factuality.
Claude Haiku 5.5
Yes. Yes on Math (best per dollar). Not the overall leader.
| Category | Claude Fable 5.1 | Claude Haiku 5.5 |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Math | #2 · Near-SOTA · Math Margin 2.2222222222222285 Epoch AI benchmarking hub · Sep 1, 2026 | #13 · #13 in Math Margin 26.66666666666667 Epoch AI benchmarking hub · Oct 7, 2026 |
| Science | — | #38 · #38 in Science Margin — Epoch AI benchmarking hub · Oct 7, 2026 |
| 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 | #26 · #26 in Coding › Web dev Margin 23.364485981308405 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #6 · Was SOTA · Long context Margin 4.08163265306122 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 | — |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 1, 2026 | — |
Claude Fable 5.1: $20 per 1M blended tokens.
Claude Haiku 5.5: $0.19999999999999998 per 1M blended tokens.
Claude Fable 5.1: closed weights.
Claude Haiku 5.5: closed weights.
Math: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 5.5 in Math at #2 against #13.
Coding › Web dev: As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 5.5 in Coding › Web dev at #5 against #26.
Claude Fable 5.1 · Claude Haiku 5.5
Claude Fable 5.1 or Claude Haiku 5.5?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 5.5 in 2 of 2 shared categories: Math and Coding › Web dev.
Claude Fable 5.1 or Claude Haiku 5.5 for Math?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 5.5 in Math at #2 against #13.
Claude Fable 5.1 or Claude Haiku 5.5 for Coding › Web dev?
As of Oct 14, 2026, Claude Fable 5.1 leads Claude Haiku 5.5 in Coding › Web dev at #5 against #26.