Claude Opus 5 vs GPT-5 Nano
As of Oct 15, 2026, Claude Opus 5 leads GPT-5 Nano in 2 of 2 shared categories: Science and Abstraction (ARC).
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
GPT-5 Nano
#72 Best recorded rank: #72 in Abstraction (ARC), as of Oct 15, 2026.
| Category | Claude Opus 5 | GPT-5 Nano |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Reasoning | #9 · Was SOTA · Reasoning Margin 5.319148936170208 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Aug 7, 2025 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | — |
| Science | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #89 · #89 in Science Margin — Epoch AI benchmarking hub · Aug 7, 2025 |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #6 · Near-SOTA · Coding › Web dev Margin 4 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #9 · Was SOTA · Long context Margin 4.7872340425531945 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 2.9069767441860535 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Aug 7, 2025 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #72 · #72 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Aug 7, 2025 |
Claude Opus 5: $10 per 1M blended tokens.
GPT-5 Nano: $0.1375 per 1M blended tokens.
Claude Opus 5: closed weights.
GPT-5 Nano: closed weights.
Science: As of Oct 15, 2026, Claude Opus 5 leads GPT-5 Nano in Science at #12 against #89.
Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5 leads GPT-5 Nano in Abstraction (ARC) at #3 against #72.
Claude Opus 5 or GPT-5 Nano?
As of Oct 15, 2026, Claude Opus 5 leads GPT-5 Nano in 2 of 2 shared categories: Science and Abstraction (ARC).
Claude Opus 5 or GPT-5 Nano for Science?
As of Oct 15, 2026, Claude Opus 5 leads GPT-5 Nano in Science at #12 against #89.
Claude Opus 5 or GPT-5 Nano for Abstraction (ARC)?
As of Oct 15, 2026, Claude Opus 5 leads GPT-5 Nano in Abstraction (ARC) at #3 against #72.