Claude Fable 5.1 vs O3 Mini
As of Oct 14, 2026, Claude Fable 5.1 leads O3 Mini in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Abstraction (ARC).
| Category | Claude Fable 5.1 | O3 Mini |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | #133 · Was SOTA · Reasoning Margin 91.78082191780823 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 | — | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| 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 | #145 · #145 in Long context Margin 98.63945578231292 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 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 1, 2026 | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
Claude Fable 5.1: $20 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Claude Fable 5.1: closed weights.
O3 Mini: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5.1 leads O3 Mini in General LLM at #6 against #7.
Reasoning: As of Oct 14, 2026, Claude Fable 5.1 leads O3 Mini in Reasoning at #5 against #133.
Long context: As of Oct 14, 2026, Claude Fable 5.1 leads O3 Mini in Long context at #6 against #145.
Abstraction (ARC): As of Oct 14, 2026, Claude Fable 5.1 leads O3 Mini in Abstraction (ARC) at #3 against #51.
Claude Fable 5.1 or O3 Mini?
As of Oct 14, 2026, Claude Fable 5.1 leads O3 Mini in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Abstraction (ARC).
Claude Fable 5.1 or O3 Mini for General LLM?
As of Oct 14, 2026, Claude Fable 5.1 leads O3 Mini in General LLM at #6 against #7.
Claude Fable 5.1 or O3 Mini for Reasoning?
As of Oct 14, 2026, Claude Fable 5.1 leads O3 Mini in Reasoning at #5 against #133.
Claude Fable 5.1 or O3 Mini for Long context?
As of Oct 14, 2026, Claude Fable 5.1 leads O3 Mini in Long context at #6 against #145.