Claude Fable 5 vs GPT-6 Luna
As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in 9 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Fable 5
Close. Near-SOTA in General LLM, rank #3.
GPT-6 Luna
Yes. Yes on Coding (best per dollar); Coding › Agentic (best per dollar). Not the overall leader.
| Category | Claude Fable 5 | GPT-6 Luna |
|---|---|---|
| General LLM | #3 · Near-SOTA · General LLM Margin 1.5957446808510696 LMArena leaderboard dataset · Oct 13, 2026 | #82 · #82 in General LLM Margin 43.61702127659574 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #3 · Near-SOTA · Reasoning Margin 2.1276595744680833 LMArena leaderboard dataset · Oct 13, 2026 | #76 · #76 in Reasoning Margin 40.95744680851064 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 | #33 · #33 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
| Coding | #6 · #6 in Coding Margin 31.818181818181813 Terminal-Bench Harbor Hub · Oct 6, 2026 | #17 · #17 in Coding Margin 81.81818181818181 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #6 · #6 in Coding › Agentic Margin 31.818181818181813 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 | #19 · Was SOTA · Coding › Web dev Margin 14.400000000000006 LMArena leaderboard dataset · Oct 13, 2026 | #31 · #31 in Coding › Web dev Margin 24 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #3 · Near-SOTA · Long context Margin 1.5957446808510696 LMArena leaderboard dataset · Oct 13, 2026 | #75 · #75 in Long context Margin 39.89361702127659 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #5 · Was SOTA · Vision Margin 15.78947368421052 Epoch AI benchmarking hub · Jun 9, 2026 | #17 · #17 in Vision Margin 47.36842105263158 Epoch AI benchmarking hub · Sep 22, 2026 |
| Factuality | #7 · Was SOTA · Factuality Margin 4.6511627906976685 LMArena leaderboard dataset · Oct 13, 2026 | #45 · #45 in Factuality Margin 26.74418604651163 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jun 9, 2026 | #22 · #22 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
Claude Fable 5: $20 per 1M blended tokens.
GPT-6 Luna: $0.19999999999999998 per 1M blended tokens.
Claude Fable 5: closed weights.
GPT-6 Luna: closed weights.
General LLM: As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in General LLM at #3 against #82.
Reasoning: As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in Reasoning at #3 against #76.
Science: As of Oct 15, 2026, GPT-6 Luna leads Claude Fable 5 in Science at #33 against #56.
Coding: As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in Coding at #6 against #17.
Coding › Agentic: As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in Coding › Agentic at #6 against #17.
Coding › Web dev: As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in Coding › Web dev at #19 against #31.
Long context: As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in Long context at #3 against #75.
Vision: As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in Vision at #5 against #17.
Factuality: As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in Factuality at #7 against #45.
Abstraction (ARC): As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in Abstraction (ARC) at #1 against #22.
Claude Fable 5 or GPT-6 Luna?
As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in 9 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Fable 5 or GPT-6 Luna for General LLM?
As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in General LLM at #3 against #82.
Claude Fable 5 or GPT-6 Luna for Reasoning?
As of Oct 15, 2026, Claude Fable 5 leads GPT-6 Luna in Reasoning at #3 against #76.
Claude Fable 5 or GPT-6 Luna for Science?
As of Oct 15, 2026, GPT-6 Luna leads Claude Fable 5 in Science at #33 against #56.