Claude Fable 5.1 vs GPT-5.4 Nano
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.4 Nano in 5 of 5 shared categories: General LLM, Reasoning, Long context, Factuality, and Abstraction (ARC).
Claude Fable 5.1
Yes. SOTA in co-SOTA in Factuality.
GPT-5.4 Nano
#43 Best recorded rank: #43 in Abstraction (ARC), as of Oct 14, 2026.
| Category | Claude Fable 5.1 | GPT-5.4 Nano |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #114 · #114 in General LLM Margin 77.55102040816327 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | #109 · #109 in Reasoning Margin 75.34246575342466 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 | — | #73 · #73 in Science Margin — Epoch AI benchmarking hub · Mar 17, 2026 |
| 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 | #120 · #120 in Long context Margin 81.63265306122449 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 | #98 · #98 in Factuality Margin 73.88059701492537 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 1, 2026 | #43 · #43 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Mar 17, 2026 |
Claude Fable 5.1: $20 per 1M blended tokens.
GPT-5.4 Nano: $0.4625 per 1M blended tokens.
Claude Fable 5.1: closed weights.
GPT-5.4 Nano: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.4 Nano in General LLM at #6 against #114.
Reasoning: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.4 Nano in Reasoning at #5 against #109.
Long context: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.4 Nano in Long context at #6 against #120.
Factuality: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.4 Nano in Factuality at #1 against #98.
Abstraction (ARC): As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.4 Nano in Abstraction (ARC) at #3 against #43.
Claude Fable 5.1 · GPT-5.4 Nano
Claude Fable 5.1 or GPT-5.4 Nano?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.4 Nano in 5 of 5 shared categories: General LLM, Reasoning, Long context, Factuality, and Abstraction (ARC).
Claude Fable 5.1 or GPT-5.4 Nano for General LLM?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.4 Nano in General LLM at #6 against #114.
Claude Fable 5.1 or GPT-5.4 Nano for Reasoning?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.4 Nano in Reasoning at #5 against #109.
Claude Fable 5.1 or GPT-5.4 Nano for Long context?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-5.4 Nano in Long context at #6 against #120.