Claude Opus 4.5 vs GPT-4O Mini
As of Oct 14, 2026, Claude Opus 4.5 leads GPT-4O Mini in 1 of 2 shared categories: Science.
Claude Opus 4.5
It used to be. Was SOTA in Reasoning.
GPT-4O Mini
#9 Best recorded rank: #9 in General LLM, as of Oct 14, 2026.
| Category | Claude Opus 4.5 | GPT-4O Mini |
|---|---|---|
| General LLM | #33 · #33 in General LLM Margin 22.448979591836732 LMArena leaderboard dataset · Oct 13, 2026 | #9 · #9 in General LLM Margin — LMArena leaderboard dataset · Sep 15, 2024 |
| Reasoning | #28 · Was SOTA · Reasoning Margin 19.86301369863014 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jul 18, 2024 |
| Math | #16 · #16 in Math Margin 33.33333333333333 Epoch AI benchmarking hub · Nov 24, 2025 | — |
| Science | #68 · #68 in Science Margin — Epoch AI benchmarking hub · Nov 24, 2025 | #161 · #161 in Science Margin — Epoch AI benchmarking hub · Jul 18, 2024 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Nov 24, 2025 | #— · Not enough data Margin — LMArena leaderboard dataset · Sep 27, 2024 |
| Coding › Web dev | #53 · Was SOTA · Coding › Web dev Margin 48.598130841121495 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #19 · Was SOTA · Long context Margin 12.925170068027214 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Vision | — | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #36 · #36 in Factuality Margin 27.611940298507463 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jul 18, 2024 |
| Abstraction (ARC) | #49 · #49 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Nov 24, 2025 | — |
Claude Opus 4.5: $10 per 1M blended tokens.
GPT-4O Mini: $0.26249999999999996 per 1M blended tokens.
Claude Opus 4.5: closed weights.
GPT-4O Mini: closed weights.
General LLM: As of Oct 14, 2026, GPT-4O Mini leads Claude Opus 4.5 in General LLM at #9 against #33.
Science: As of Oct 14, 2026, Claude Opus 4.5 leads GPT-4O Mini in Science at #68 against #161.
Claude Opus 4.5 or GPT-4O Mini?
As of Oct 14, 2026, Claude Opus 4.5 leads GPT-4O Mini in 1 of 2 shared categories: Science.
Claude Opus 4.5 or GPT-4O Mini for General LLM?
As of Oct 14, 2026, GPT-4O Mini leads Claude Opus 4.5 in General LLM at #9 against #33.
Claude Opus 4.5 or GPT-4O Mini for Science?
As of Oct 14, 2026, Claude Opus 4.5 leads GPT-4O Mini in Science at #68 against #161.