Claude Opus 4.6 vs O3
As of Oct 14, 2026, Claude Opus 4.6 leads O3 in 6 of 6 shared categories: General LLM, Reasoning, Math, Science, Long context, and Factuality.
| Category | Claude Opus 4.6 | O3 |
|---|---|---|
| General LLM | #4 · Near-SOTA · General LLM Margin 2.7210884353741562 LMArena leaderboard dataset · Oct 13, 2026 | #78 · Was SOTA · General LLM Margin 53.06122448979592 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #2 · Near-SOTA · Reasoning Margin 2.0547945205479436 LMArena leaderboard dataset · Oct 13, 2026 | #90 · Was SOTA · Reasoning Margin 62.32876712328767 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #11 · #11 in Math Margin 22.22222222222223 Epoch AI benchmarking hub · Feb 5, 2026 | #20 · Was SOTA · Math Margin 42.22222222222222 Epoch AI benchmarking hub · Apr 16, 2025 |
| Science | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #67 · #67 in Science Margin — Epoch AI benchmarking hub · Apr 16, 2025 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 5, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Apr 16, 2025 |
| Coding › Web dev | #35 · Was SOTA · Coding › Web dev Margin 31.775700934579433 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #2 · Near-SOTA · Long context Margin 0.6802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #110 · Was SOTA · Long context Margin 74.82993197278913 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #3 · Near-SOTA · Factuality Margin 2.9850746268656536 LMArena leaderboard dataset · Oct 13, 2026 | #105 · #105 in Factuality Margin 79.1044776119403 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #37 · #37 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 16, 2025 |
Claude Opus 4.6: $10 per 1M blended tokens.
O3: $3.5 per 1M blended tokens.
Claude Opus 4.6: closed weights.
O3: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.6 leads O3 in General LLM at #4 against #78.
Reasoning: As of Oct 14, 2026, Claude Opus 4.6 leads O3 in Reasoning at #2 against #90.
Math: As of Oct 14, 2026, Claude Opus 4.6 leads O3 in Math at #11 against #20.
Science: As of Oct 14, 2026, Claude Opus 4.6 leads O3 in Science at #32 against #67.
Long context: As of Oct 14, 2026, Claude Opus 4.6 leads O3 in Long context at #2 against #110.
Factuality: As of Oct 14, 2026, Claude Opus 4.6 leads O3 in Factuality at #3 against #105.
Claude Opus 4.6 or O3?
As of Oct 14, 2026, Claude Opus 4.6 leads O3 in 6 of 6 shared categories: General LLM, Reasoning, Math, Science, Long context, and Factuality.
Claude Opus 4.6 or O3 for General LLM?
As of Oct 14, 2026, Claude Opus 4.6 leads O3 in General LLM at #4 against #78.
Claude Opus 4.6 or O3 for Reasoning?
As of Oct 14, 2026, Claude Opus 4.6 leads O3 in Reasoning at #2 against #90.
Claude Opus 4.6 or O3 for Math?
As of Oct 14, 2026, Claude Opus 4.6 leads O3 in Math at #11 against #20.