Claude Opus 4.6 vs GPT-5.6 Luna
As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Luna in 5 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.6
Close. Near-SOTA in Reasoning, rank #2.
GPT-5.6 Luna
#16 Best current rank: #16 in Coding, as of Oct 14, 2026.
| Category | Claude Opus 4.6 | GPT-5.6 Luna |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 | #53 · #53 in General LLM Margin 36.054421768707485 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 | #55 · #55 in Reasoning Margin 38.35616438356164 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #25 · #25 in Science Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #16 · #16 in Coding Margin 77.27272727272728 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | — | #16 · #16 in Coding › Agentic Margin 77.27272727272728 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #35 · Was SOTA · Coding › Web dev Margin 31.775700934579433 LMArena leaderboard dataset · Oct 13, 2026 | #43 · #43 in Coding › Web dev Margin 39.25233644859813 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #2 · Near-SOTA · Long context Margin 0.6802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #65 · #65 in Long context Margin 44.21768707482993 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #19 · #19 in Vision Margin 52.63157894736842 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in Factuality Margin 26.86567164179104 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #19 · #19 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
Claude Opus 4.6: $10 per 1M blended tokens.
GPT-5.6 Luna: $0.44999999999999996 per 1M blended tokens.
Claude Opus 4.6: closed weights.
GPT-5.6 Luna: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Luna in General LLM at #4 against #53.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Luna in Reasoning at #2 against #55.
Science: As of Oct 14, 2026, GPT-5.6 Luna leads Claude Opus 4.6 in Science at #25 against #32.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Luna in Coding › Web dev at #35 against #43.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Luna in Long context at #2 against #65.
Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Luna in Factuality at #3 against #35.
Claude Opus 4.6 · GPT-5.6 Luna
Claude Opus 4.6 or GPT-5.6 Luna?
As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Luna in 5 of 6 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.6 or GPT-5.6 Luna for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Luna in General LLM at #4 against #53.
Claude Opus 4.6 or GPT-5.6 Luna for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads GPT-5.6 Luna in Reasoning at #2 against #55.
Claude Opus 4.6 or GPT-5.6 Luna for Science?
As of Oct 14, 2026, GPT-5.6 Luna leads Claude Opus 4.6 in Science at #25 against #32.