Claude Fable 5 vs O3 Mini
As of Oct 15, 2026, Claude Fable 5 leads O3 Mini in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
Claude Fable 5
Close. Near-SOTA in General LLM, rank #3.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | Claude Fable 5 | O3 Mini |
|---|---|---|
| General LLM | #3 · Near-SOTA · General LLM Margin 1.5957446808510696 LMArena leaderboard dataset · Oct 13, 2026 | #10 · #10 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #3 · Near-SOTA · Reasoning Margin 2.1276595744680833 LMArena leaderboard dataset · Oct 13, 2026 | #172 · Was SOTA · Reasoning Margin 92.02127659574468 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #56 · #56 in Science Margin — Epoch AI benchmarking hub · Jun 9, 2026 | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Coding | #6 · #6 in Coding Margin 31.818181818181813 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #6 · #6 in Coding › Agentic Margin 31.818181818181813 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #19 · Was SOTA · Coding › Web dev Margin 14.400000000000006 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #3 · Near-SOTA · Long context Margin 1.5957446808510696 LMArena leaderboard dataset · Oct 13, 2026 | #186 · #186 in Long context Margin 98.93617021276596 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #5 · Was SOTA · Vision Margin 15.78947368421052 Epoch AI benchmarking hub · Jun 9, 2026 | — |
| Factuality | #7 · Was SOTA · Factuality Margin 4.6511627906976685 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jun 9, 2026 | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
Claude Fable 5: $20 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Claude Fable 5: closed weights.
O3 Mini: closed weights.
General LLM: As of Oct 15, 2026, Claude Fable 5 leads O3 Mini in General LLM at #3 against #10.
Reasoning: As of Oct 15, 2026, Claude Fable 5 leads O3 Mini in Reasoning at #3 against #172.
Science: As of Oct 15, 2026, Claude Fable 5 leads O3 Mini in Science at #56 against #76.
Long context: As of Oct 15, 2026, Claude Fable 5 leads O3 Mini in Long context at #3 against #186.
Abstraction (ARC): As of Oct 15, 2026, Claude Fable 5 leads O3 Mini in Abstraction (ARC) at #1 against #51.
Claude Fable 5 or O3 Mini?
As of Oct 15, 2026, Claude Fable 5 leads O3 Mini in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
Claude Fable 5 or O3 Mini for General LLM?
As of Oct 15, 2026, Claude Fable 5 leads O3 Mini in General LLM at #3 against #10.
Claude Fable 5 or O3 Mini for Reasoning?
As of Oct 15, 2026, Claude Fable 5 leads O3 Mini in Reasoning at #3 against #172.
Claude Fable 5 or O3 Mini for Science?
As of Oct 15, 2026, Claude Fable 5 leads O3 Mini in Science at #56 against #76.