Claude Sonnet 5.5 vs GPT-6 Luna
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in 9 of 9 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, and Factuality.
Claude Sonnet 5.5
Yes. SOTA in co-SOTA in Coding, co-SOTA in Coding › Agentic and co-SOTA in Vision.
GPT-6 Luna
Yes. Yes on Coding (best per dollar); Coding › Agentic (best per dollar). Not the overall leader.
| Category | Claude Sonnet 5.5 | GPT-6 Luna |
|---|---|---|
| General LLM | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 | #65 · #65 in General LLM Margin 44.21768707482993 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #61 · #61 in Reasoning Margin 42.465753424657535 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 2026 | #33 · #33 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #17 · #17 in Coding Margin 81.81818181818181 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 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 | #3 · Near-SOTA · Coding › Web dev Margin 1.8691588785046775 LMArena leaderboard dataset · Oct 13, 2026 | #29 · #29 in Coding › Web dev Margin 26.168224299065415 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #11 · #11 in Long context Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #61 · #61 in Long context Margin 41.49659863945578 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | #17 · #17 in Vision Margin 47.36842105263158 Epoch AI benchmarking hub · Sep 22, 2026 |
| Factuality | #16 · #16 in Factuality Margin 12.68656716417911 LMArena leaderboard dataset · Oct 13, 2026 | #39 · #39 in Factuality Margin 29.85074626865672 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #22 · #22 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
GPT-6 Luna: $0.19999999999999998 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
GPT-6 Luna: closed weights.
General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in General LLM at #27 against #65.
Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in Reasoning at #18 against #61.
Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in Science at #3 against #33.
Coding: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in Coding at #1 against #17.
Coding › Agentic: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in Coding › Agentic at #1 against #17.
Coding › Web dev: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in Coding › Web dev at #3 against #29.
Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in Long context at #11 against #61.
Vision: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in Vision at #1 against #17.
Factuality: As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in Factuality at #16 against #39.
Claude Sonnet 5.5 · GPT-6 Luna
Claude Sonnet 5.5 or GPT-6 Luna?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in 9 of 9 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, and Factuality.
Claude Sonnet 5.5 or GPT-6 Luna for General LLM?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in General LLM at #27 against #65.
Claude Sonnet 5.5 or GPT-6 Luna for Reasoning?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in Reasoning at #18 against #61.
Claude Sonnet 5.5 or GPT-6 Luna for Science?
As of Oct 14, 2026, Claude Sonnet 5.5 leads GPT-6 Luna in Science at #3 against #33.