Claude Fable 5.1 vs O1 Preview
As of Oct 14, 2026, Claude Fable 5.1 leads O1 Preview in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Abstraction (ARC).
Claude Fable 5.1
Yes. SOTA in co-SOTA in Factuality.
O1 Preview
It used to be. Was SOTA in General LLM.
| Category | Claude Fable 5.1 | O1 Preview |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #129 · Was SOTA · General LLM Margin 87.75510204081633 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | #137 · Was SOTA · Reasoning Margin 94.52054794520548 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 | — | #125 · #125 in Science Margin — Epoch AI benchmarking hub · Sep 12, 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 | #135 · Was SOTA · Long context Margin 91.83673469387755 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 | #73 · #73 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 12, 2024 |
Claude Fable 5.1: $20 per 1M blended tokens.
O1 Preview: price per 1M tokens is unset in the catalog.
Claude Fable 5.1: closed weights.
O1 Preview: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5.1 leads O1 Preview in General LLM at #6 against #129.
Reasoning: As of Oct 14, 2026, Claude Fable 5.1 leads O1 Preview in Reasoning at #5 against #137.
Long context: As of Oct 14, 2026, Claude Fable 5.1 leads O1 Preview in Long context at #6 against #135.
Abstraction (ARC): As of Oct 14, 2026, Claude Fable 5.1 leads O1 Preview in Abstraction (ARC) at #3 against #73.
Claude Fable 5.1 or O1 Preview?
As of Oct 14, 2026, Claude Fable 5.1 leads O1 Preview in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Abstraction (ARC).
Claude Fable 5.1 or O1 Preview for General LLM?
As of Oct 14, 2026, Claude Fable 5.1 leads O1 Preview in General LLM at #6 against #129.
Claude Fable 5.1 or O1 Preview for Reasoning?
As of Oct 14, 2026, Claude Fable 5.1 leads O1 Preview in Reasoning at #5 against #137.
Claude Fable 5.1 or O1 Preview for Long context?
As of Oct 14, 2026, Claude Fable 5.1 leads O1 Preview in Long context at #6 against #135.