Compare · 2026-10-15
Claude 3 Opus vs O3
As of Oct 15, 2026, Claude 3 Opus leads O3 in 1 of 2 shared categories: General LLM.
A
Claude 3 Opus
#11 Best recorded rank: #11 in General LLM, as of Oct 15, 2026.
O
O3
It used to be. Was SOTA in General LLM.
| Category | Claude 3 Opus | O3 |
|---|---|---|
| General LLM | #11 · #11 in General LLM Margin — LMArena leaderboard dataset · Sep 27, 2024 | #100 · Was SOTA · General LLM Margin 53.191489361702125 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 7, 2024 | #117 · Was SOTA · Reasoning Margin 62.765957446808514 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | — | #20 · Was SOTA · Math Margin 42.22222222222222 Epoch AI benchmarking hub · Apr 16, 2025 |
| Science | #138 · #138 in Science Margin — Epoch AI benchmarking hub · Feb 29, 2024 | #67 · #67 in Science Margin — Epoch AI benchmarking hub · Apr 16, 2025 |
| Coding | — | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | — | #145 · Was SOTA · Long context Margin 77.12765957446808 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 | #— · Not enough data Margin — Epoch AI benchmarking hub · Feb 29, 2024 | #139 · #139 in Factuality Margin 81.3953488372093 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #37 · #37 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 16, 2025 |
Price per 1M tokens
Claude 3 Opus: price per 1M tokens is unset in the catalog.
O3: $3.5 per 1M blended tokens.
Open weights
Claude 3 Opus: closed weights.
O3: closed weights.
Which to pick
General LLM: As of Oct 15, 2026, Claude 3 Opus leads O3 in General LLM at #11 against #100.
Science: As of Oct 15, 2026, O3 leads Claude 3 Opus in Science at #67 against #138.
Claude 3 Opus or O3?
As of Oct 15, 2026, Claude 3 Opus leads O3 in 1 of 2 shared categories: General LLM.
Claude 3 Opus or O3 for General LLM?
As of Oct 15, 2026, Claude 3 Opus leads O3 in General LLM at #11 against #100.
Claude 3 Opus or O3 for Science?
As of Oct 15, 2026, O3 leads Claude 3 Opus in Science at #67 against #138.