Claude Fable 5.1 vs GPT-6 Luna
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in 9 of 9 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Fable 5.1
Yes. SOTA in co-SOTA in Factuality.
GPT-6 Luna
Yes. Yes on Coding (best per dollar); Coding › Agentic (best per dollar). Not the overall leader.
| Category | Claude Fable 5.1 | GPT-6 Luna |
|---|---|---|
| General LLM | #6 · Was SOTA · General LLM Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #65 · #65 in General LLM Margin 44.21768707482993 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #5 · Was SOTA · Reasoning Margin 4.109589041095887 LMArena leaderboard dataset · Oct 13, 2026 | #61 · #61 in Reasoning Margin 42.465753424657535 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 | — | #33 · #33 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
| Coding | #3 · Near-SOTA · Coding Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 | #17 · #17 in Coding Margin 81.81818181818181 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #3 · Near-SOTA · Coding › Agentic Margin 18.181818181818187 Terminal-Bench Harbor Hub · Oct 6, 2026 | #17 · #17 in Coding › Agentic Margin 81.81818181818181 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 | #29 · #29 in Coding › Web dev Margin 26.168224299065415 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #6 · Was SOTA · Long context Margin 4.08163265306122 LMArena leaderboard dataset · Oct 13, 2026 | #61 · #61 in Long context Margin 41.49659863945578 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #6 · #6 in Vision Margin 18.421052631578945 Epoch AI benchmarking hub · Sep 1, 2026 | #17 · #17 in Vision Margin 47.36842105263158 Epoch AI benchmarking hub · Sep 22, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #39 · #39 in Factuality Margin 29.85074626865672 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 1, 2026 | #22 · #22 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
Claude Fable 5.1: $20 per 1M blended tokens.
GPT-6 Luna: $0.19999999999999998 per 1M blended tokens.
Claude Fable 5.1: closed weights.
GPT-6 Luna: closed weights.
General LLM: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in General LLM at #6 against #65.
Reasoning: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in Reasoning at #5 against #61.
Coding: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in Coding at #3 against #17.
Coding › Agentic: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in Coding › Agentic at #3 against #17.
Coding › Web dev: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in Coding › Web dev at #5 against #29.
Long context: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in Long context at #6 against #61.
Vision: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in Vision at #6 against #17.
Factuality: As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in Factuality at #1 against #39.
Abstraction (ARC): As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in Abstraction (ARC) at #3 against #22.
Claude Fable 5.1 or GPT-6 Luna?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in 9 of 9 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Fable 5.1 or GPT-6 Luna for General LLM?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in General LLM at #6 against #65.
Claude Fable 5.1 or GPT-6 Luna for Reasoning?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in Reasoning at #5 against #61.
Claude Fable 5.1 or GPT-6 Luna for Coding?
As of Oct 14, 2026, Claude Fable 5.1 leads GPT-6 Luna in Coding at #3 against #17.