Claude Opus 5 vs O3 Mini
As of Oct 14, 2026, Claude Opus 5 leads O3 Mini in 4 of 5 shared categories: Reasoning, Science, Long context, and Abstraction (ARC).
| Category | Claude Opus 5 | O3 Mini |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 LMArena leaderboard dataset · Oct 13, 2026 | #133 · Was SOTA · Reasoning Margin 91.78082191780823 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 | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| 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 | — |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #145 · #145 in Long context Margin 98.63945578231292 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | — |
| Factuality | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
Claude Opus 5: $10 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Claude Opus 5: closed weights.
O3 Mini: closed weights.
General LLM: As of Oct 14, 2026, O3 Mini leads Claude Opus 5 in General LLM at #7 against #11.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads O3 Mini in Reasoning at #9 against #133.
Science: As of Oct 14, 2026, Claude Opus 5 leads O3 Mini in Science at #12 against #76.
Long context: As of Oct 14, 2026, Claude Opus 5 leads O3 Mini in Long context at #9 against #145.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5 leads O3 Mini in Abstraction (ARC) at #3 against #51.
Claude Opus 5 or O3 Mini?
As of Oct 14, 2026, Claude Opus 5 leads O3 Mini in 4 of 5 shared categories: Reasoning, Science, Long context, and Abstraction (ARC).
Claude Opus 5 or O3 Mini for General LLM?
As of Oct 14, 2026, O3 Mini leads Claude Opus 5 in General LLM at #7 against #11.
Claude Opus 5 or O3 Mini for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads O3 Mini in Reasoning at #9 against #133.
Claude Opus 5 or O3 Mini for Science?
As of Oct 14, 2026, Claude Opus 5 leads O3 Mini in Science at #12 against #76.