Claude Opus 4.1 vs O3 Mini
As of Oct 14, 2026, Claude Opus 4.1 leads O3 Mini in 2 of 4 shared categories: Reasoning and Long context.
Claude Opus 4.1
It used to be. Was SOTA in General LLM.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | Claude Opus 4.1 | O3 Mini |
|---|---|---|
| General LLM | #57 · Was SOTA · General LLM Margin 38.775510204081634 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #47 · Was SOTA · Reasoning Margin 32.87671232876713 LMArena leaderboard dataset · Oct 13, 2026 | #133 · Was SOTA · Reasoning Margin 91.78082191780823 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #27 · #27 in Math Margin 57.77777777777778 Epoch AI benchmarking hub · Aug 5, 2025 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #83 · #83 in Science Margin — Epoch AI benchmarking hub · Aug 5, 2025 | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Aug 5, 2025 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #76 · Was SOTA · Coding › Web dev Margin 70.09345794392523 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #44 · Was SOTA · Long context Margin 29.931972789115648 LMArena leaderboard dataset · Oct 13, 2026 | #145 · #145 in Long context Margin 98.63945578231292 LMArena leaderboard dataset · Oct 13, 2026 |
| Factuality | #74 · #74 in Factuality Margin 55.97014925373134 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | — | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
Claude Opus 4.1: $29.999999999999996 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Claude Opus 4.1: closed weights.
O3 Mini: closed weights.
General LLM: As of Oct 14, 2026, O3 Mini leads Claude Opus 4.1 in General LLM at #7 against #57.
Reasoning: As of Oct 14, 2026, Claude Opus 4.1 leads O3 Mini in Reasoning at #47 against #133.
Science: As of Oct 14, 2026, O3 Mini leads Claude Opus 4.1 in Science at #76 against #83.
Long context: As of Oct 14, 2026, Claude Opus 4.1 leads O3 Mini in Long context at #44 against #145.
Claude Opus 4.1 or O3 Mini?
As of Oct 14, 2026, Claude Opus 4.1 leads O3 Mini in 2 of 4 shared categories: Reasoning and Long context.
Claude Opus 4.1 or O3 Mini for General LLM?
As of Oct 14, 2026, O3 Mini leads Claude Opus 4.1 in General LLM at #7 against #57.
Claude Opus 4.1 or O3 Mini for Reasoning?
As of Oct 14, 2026, Claude Opus 4.1 leads O3 Mini in Reasoning at #47 against #133.
Claude Opus 4.1 or O3 Mini for Science?
As of Oct 14, 2026, O3 Mini leads Claude Opus 4.1 in Science at #76 against #83.