Claude Opus 5 vs GPT-5.6 Luna
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 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
Close. Near-SOTA in Factuality, rank #4.
GPT-5.6 Luna
#16 Best current rank: #16 in Coding, as of Oct 14, 2026.
| Category | Claude Opus 5 | GPT-5.6 Luna |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #53 · #53 in General LLM Margin 36.054421768707485 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 LMArena leaderboard dataset · Oct 13, 2026 | #55 · #55 in Reasoning Margin 38.35616438356164 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 | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #25 · #25 in Science Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #16 · #16 in Coding Margin 77.27272727272728 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #16 · #16 in Coding › Agentic Margin 77.27272727272728 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #6 · Was SOTA · Coding › Web dev Margin 4.672897196261687 LMArena leaderboard dataset · Oct 13, 2026 | #43 · #43 in Coding › Web dev Margin 39.25233644859813 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #65 · #65 in Long context Margin 44.21768707482993 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | #19 · #19 in Vision Margin 52.63157894736842 Epoch AI benchmarking hub · Jul 9, 2026 |
| Factuality | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 | #35 · #35 in Factuality Margin 26.86567164179104 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #19 · #19 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 9, 2026 |
Claude Opus 5: $10 per 1M blended tokens.
GPT-5.6 Luna: $0.44999999999999996 per 1M blended tokens.
Claude Opus 5: closed weights.
GPT-5.6 Luna: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in General LLM at #11 against #53.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in Reasoning at #9 against #55.
Science: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in Science at #12 against #25.
Coding: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in Coding at #4 against #16.
Coding › Agentic: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in Coding › Agentic at #4 against #16.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in Coding › Web dev at #6 against #43.
Long context: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in Long context at #9 against #65.
Vision: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in Vision at #12 against #19.
Factuality: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in Factuality at #4 against #35.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in Abstraction (ARC) at #3 against #19.
Claude Opus 5 or GPT-5.6 Luna?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 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 or GPT-5.6 Luna for General LLM?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in General LLM at #11 against #53.
Claude Opus 5 or GPT-5.6 Luna for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in Reasoning at #9 against #55.
Claude Opus 5 or GPT-5.6 Luna for Science?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.6 Luna in Science at #12 against #25.