Claude Opus 5.5 vs GPT-6 Luna
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in 10 of 10 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and 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 Opus 5.5 | GPT-6 Luna |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #65 · #65 in General LLM Margin 44.21768707482993 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #61 · #61 in Reasoning Margin 42.465753424657535 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 | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 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 | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #29 · #29 in Coding › Web dev Margin 26.168224299065415 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #61 · #61 in Long context Margin 41.49659863945578 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 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) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #22 · #22 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
GPT-6 Luna: $0.19999999999999998 per 1M blended tokens.
Claude Opus 5.5: closed weights.
GPT-6 Luna: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in General LLM at #2 against #65.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in Reasoning at #1 against #61.
Science: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in Science at #31 against #33.
Coding: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in Coding at #1 against #17.
Coding › Agentic: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in Coding › Agentic at #1 against #17.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in Coding › Web dev at #1 against #29.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in Long context at #1 against #61.
Vision: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in Vision at #4 against #17.
Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in Factuality at #1 against #39.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in Abstraction (ARC) at #1 against #22.
Claude Opus 5.5 or GPT-6 Luna?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in 10 of 10 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).
Claude Opus 5.5 or GPT-6 Luna for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in General LLM at #2 against #65.
Claude Opus 5.5 or GPT-6 Luna for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in Reasoning at #1 against #61.
Claude Opus 5.5 or GPT-6 Luna for Science?
As of Oct 14, 2026, Claude Opus 5.5 leads GPT-6 Luna in Science at #31 against #33.