Claude Fable 5.1 vs GPT-5
As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in 7 of 7 shared categories: General LLM, Reasoning, Math, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
| Category | Claude Fable 5.1 | GPT-5 |
|---|---|---|
| General LLM | #6 · Near-SOTA · General LLM Margin 3.191489361702125 LMArena leaderboard dataset · Oct 13, 2026 | #95 · Was SOTA · General LLM Margin 50.53191489361702 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Near-SOTA · Reasoning Margin 3.191489361702125 LMArena leaderboard dataset · Oct 13, 2026 | #103 · Was SOTA · Reasoning Margin 55.319148936170215 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #2 · Near-SOTA · Math Margin 2.2222222222222285 Epoch AI benchmarking hub · Sep 1, 2026 | #15 · Was SOTA · Math Margin 31.111111111111114 Epoch AI benchmarking hub · Aug 7, 2025 |
| Science | — | #54 · #54 in Science Margin — Epoch AI benchmarking hub · Aug 7, 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 3.200000000000003 LMArena leaderboard dataset · Oct 13, 2026 | #72 · #72 in Coding › Web dev Margin 56.8 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #6 · Near-SOTA · Long context Margin 3.1914893617021107 LMArena leaderboard dataset · Oct 13, 2026 | #142 · Was SOTA · Long context Margin 75.53191489361703 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 | #119 · #119 in Factuality Margin 69.76744186046511 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 1, 2026 | #34 · #34 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Aug 7, 2025 |
Claude Fable 5.1: $20 per 1M blended tokens.
GPT-5: $3.4375000000000004 per 1M blended tokens.
Claude Fable 5.1: closed weights.
GPT-5: closed weights.
General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in General LLM at #6 against #95.
Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in Reasoning at #5 against #103.
Math: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in Math at #2 against #15.
Coding › Web dev: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in Coding › Web dev at #5 against #72.
Long context: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in Long context at #6 against #142.
Factuality: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in Factuality at #1 against #119.
Abstraction (ARC): As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in Abstraction (ARC) at #3 against #34.
Claude Fable 5.1 or GPT-5?
As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in 7 of 7 shared categories: General LLM, Reasoning, Math, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
Claude Fable 5.1 or GPT-5 for General LLM?
As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in General LLM at #6 against #95.
Claude Fable 5.1 or GPT-5 for Reasoning?
As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in Reasoning at #5 against #103.
Claude Fable 5.1 or GPT-5 for Math?
As of Oct 15, 2026, Claude Fable 5.1 leads GPT-5 in Math at #2 against #15.