Claude Opus 4.8 vs O3 Mini
As of Oct 14, 2026, Claude Opus 4.8 leads O3 Mini in 4 of 5 shared categories: Reasoning, Science, Long context, and Abstraction (ARC).
Claude Opus 4.8
It used to be. Was SOTA in Coding › Web dev.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | Claude Opus 4.8 | O3 Mini |
|---|---|---|
| General LLM | #20 · #20 in General LLM Margin 13.605442176870753 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #10 · #10 in Reasoning Margin 7.534246575342465 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 | #27 · #27 in Science Margin — Epoch AI benchmarking hub · May 28, 2026 | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Coding | #12 · #12 in Coding Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #12 · #12 in Coding › Agentic Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #33 · Was SOTA · Coding › Web dev Margin 29.90654205607477 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #10 · Was SOTA · Long context Margin 6.802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #145 · #145 in Long context Margin 98.63945578231292 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #13 · #13 in Vision Margin 36.842105263157904 Epoch AI benchmarking hub · May 28, 2026 | — |
| Factuality | #21 · #21 in Factuality Margin 16.417910447761187 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | #12 · #12 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 28, 2026 | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
Claude Opus 4.8: $10 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Claude Opus 4.8: closed weights.
O3 Mini: closed weights.
General LLM: As of Oct 14, 2026, O3 Mini leads Claude Opus 4.8 in General LLM at #7 against #20.
Reasoning: As of Oct 14, 2026, Claude Opus 4.8 leads O3 Mini in Reasoning at #10 against #133.
Science: As of Oct 14, 2026, Claude Opus 4.8 leads O3 Mini in Science at #27 against #76.
Long context: As of Oct 14, 2026, Claude Opus 4.8 leads O3 Mini in Long context at #10 against #145.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 4.8 leads O3 Mini in Abstraction (ARC) at #12 against #51.
Claude Opus 4.8 or O3 Mini?
As of Oct 14, 2026, Claude Opus 4.8 leads O3 Mini in 4 of 5 shared categories: Reasoning, Science, Long context, and Abstraction (ARC).
Claude Opus 4.8 or O3 Mini for General LLM?
As of Oct 14, 2026, O3 Mini leads Claude Opus 4.8 in General LLM at #7 against #20.
Claude Opus 4.8 or O3 Mini for Reasoning?
As of Oct 14, 2026, Claude Opus 4.8 leads O3 Mini in Reasoning at #10 against #133.
Claude Opus 4.8 or O3 Mini for Science?
As of Oct 14, 2026, Claude Opus 4.8 leads O3 Mini in Science at #27 against #76.