Claude Opus 5 vs GPT-5.1
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
GPT-5.1
#18 Best current rank: #18 in Math, as of Oct 14, 2026.
| Category | Claude Opus 5 | GPT-5.1 |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #47 · #47 in General LLM Margin 31.972789115646265 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 LMArena leaderboard dataset · Oct 13, 2026 | #48 · #48 in Reasoning Margin 33.56164383561644 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #18 · #18 in Math Margin 37.77777777777778 Epoch AI benchmarking hub · Nov 13, 2025 |
| Science | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #48 · #48 in Science Margin — Epoch AI benchmarking hub · Nov 13, 2025 |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Nov 13, 2025 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 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 | #75 · #75 in Coding › Web dev Margin 69.1588785046729 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #54 · #54 in Long context Margin 36.73469387755103 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 | #37 · #37 in Factuality Margin 28.358208955223887 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #31 · #31 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Nov 13, 2025 |
Claude Opus 5: $10 per 1M blended tokens.
GPT-5.1: $3.4375000000000004 per 1M blended tokens.
Claude Opus 5: closed weights.
GPT-5.1: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in General LLM at #11 against #47.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in Reasoning at #9 against #48.
Science: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in Science at #12 against #48.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in Coding › Web dev at #6 against #75.
Long context: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in Long context at #9 against #54.
Factuality: As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in Factuality at #4 against #37.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in Abstraction (ARC) at #3 against #31.
Claude Opus 5 or GPT-5.1?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).
Claude Opus 5 or GPT-5.1 for General LLM?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in General LLM at #11 against #47.
Claude Opus 5 or GPT-5.1 for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in Reasoning at #9 against #48.
Claude Opus 5 or GPT-5.1 for Science?
As of Oct 14, 2026, Claude Opus 5 leads GPT-5.1 in Science at #12 against #48.