Claude Fable 5.1 vs O1
As of Oct 15, 2026, Claude Fable 5.1 leads O1 in 5 of 5 shared categories: General LLM, Reasoning, Math, Long context, and Abstraction (ARC).
| Category | Claude Fable 5.1 | O1 |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #112 · Was SOTA · General LLM Margin 76.19047619047619 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | #117 · Was SOTA · Reasoning Margin 80.82191780821918 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #2 · Near-SOTA · Math Margin 2.2222222222222285 Epoch AI benchmarking hub · Sep 1, 2026 | #34 · #34 in Math Margin 75.55555555555556 Epoch AI benchmarking hub · Dec 17, 2024 |
| Science | — | #77 · #77 in Science Margin — Epoch AI benchmarking hub · Dec 17, 2024 |
| Coding | #3 · Near-SOTA · Coding Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 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 | — |
| Long context | #6 · Was SOTA · Long context Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #108 · Was SOTA · Long context Margin 73.46938775510205 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #6 · #6 in Vision Margin 18.421052631578945 Epoch AI benchmarking hub · Sep 1, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Dec 17, 2024 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 1, 2026 | #57 · #57 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Dec 17, 2024 |
Claude Fable 5.1: $20 per 1M blended tokens.
O1: $26.25 per 1M blended tokens.
Claude Fable 5.1: closed weights.
O1: closed weights.
General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads O1 in General LLM at #6 against #112.
Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads O1 in Reasoning at #5 against #117.
Math: As of Oct 15, 2026, Claude Fable 5.1 leads O1 in Math at #2 against #34.
Long context: As of Oct 15, 2026, Claude Fable 5.1 leads O1 in Long context at #6 against #108.
Abstraction (ARC): As of Oct 15, 2026, Claude Fable 5.1 leads O1 in Abstraction (ARC) at #3 against #57.
Claude Fable 5.1 or O1?
As of Oct 15, 2026, Claude Fable 5.1 leads O1 in 5 of 5 shared categories: General LLM, Reasoning, Math, Long context, and Abstraction (ARC).
Claude Fable 5.1 or O1 for General LLM?
As of Oct 15, 2026, Claude Fable 5.1 leads O1 in General LLM at #6 against #112.
Claude Fable 5.1 or O1 for Reasoning?
As of Oct 15, 2026, Claude Fable 5.1 leads O1 in Reasoning at #5 against #117.
Claude Fable 5.1 or O1 for Math?
As of Oct 15, 2026, Claude Fable 5.1 leads O1 in Math at #2 against #34.