Claude Fable 5.1 vs GPT-4.1
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-4.1 in 6 of 6 shared categories: General LLM, Reasoning, Math, Long context, Factuality, and Abstraction (ARC).
Claude Fable 5.1
Yes. SOTA in co-SOTA in Factuality.
GPT-4.1
It used to be. Was SOTA in Long context.
| Category | Claude Fable 5.1 | GPT-4.1 |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #101 · #101 in General LLM Margin 68.70748299319727 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | #102 · #102 in Reasoning Margin 70.54794520547945 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #2 · Near-SOTA · Math Margin 2.2222222222222285 Epoch AI benchmarking hub · Sep 1, 2026 | #39 · #39 in Math Margin 86.66666666666667 Epoch AI benchmarking hub · Apr 14, 2025 |
| Science | — | #96 · #96 in Science Margin — Epoch AI benchmarking hub · Apr 14, 2025 |
| Coding | #3 · Near-SOTA · Coding Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Apr 14, 2025 |
| 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 | #95 · Was SOTA · Long context Margin 64.62585034013605 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 | #103 · #103 in Factuality Margin 77.61194029850746 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 1, 2026 | #85 · #85 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 14, 2025 |
Claude Fable 5.1: $20 per 1M blended tokens.
GPT-4.1: $3.5 per 1M blended tokens.
Claude Fable 5.1: closed weights.
GPT-4.1: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-4.1 in General LLM at #6 against #101.
Reasoning: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-4.1 in Reasoning at #5 against #102.
Math: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-4.1 in Math at #2 against #39.
Long context: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-4.1 in Long context at #6 against #95.
Factuality: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-4.1 in Factuality at #1 against #103.
Abstraction (ARC): As of Oct 14, 2026, Claude Fable 5.1 leads GPT-4.1 in Abstraction (ARC) at #3 against #85.
Claude Fable 5.1 or GPT-4.1?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-4.1 in 6 of 6 shared categories: General LLM, Reasoning, Math, Long context, Factuality, and Abstraction (ARC).
Claude Fable 5.1 or GPT-4.1 for General LLM?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-4.1 in General LLM at #6 against #101.
Claude Fable 5.1 or GPT-4.1 for Reasoning?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-4.1 in Reasoning at #5 against #102.
Claude Fable 5.1 or GPT-4.1 for Math?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-4.1 in Math at #2 against #39.