Claude Opus 5 vs O1 Preview
As of Oct 14, 2026, Claude Opus 5 leads O1 Preview in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
O1 Preview
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 5 | O1 Preview |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #129 · Was SOTA · General LLM Margin 87.75510204081633 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 LMArena leaderboard dataset · Oct 13, 2026 | #137 · Was SOTA · Reasoning Margin 94.52054794520548 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 | #125 · #125 in Science Margin — Epoch AI benchmarking hub · Sep 12, 2024 |
| 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 | #135 · Was SOTA · Long context Margin 91.83673469387755 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 | — |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | #73 · #73 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 12, 2024 |
Claude Opus 5: $10 per 1M blended tokens.
O1 Preview: price per 1M tokens is unset in the catalog.
Claude Opus 5: closed weights.
O1 Preview: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5 leads O1 Preview in General LLM at #11 against #129.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads O1 Preview in Reasoning at #9 against #137.
Science: As of Oct 14, 2026, Claude Opus 5 leads O1 Preview in Science at #12 against #125.
Long context: As of Oct 14, 2026, Claude Opus 5 leads O1 Preview in Long context at #9 against #135.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5 leads O1 Preview in Abstraction (ARC) at #3 against #73.
Claude Opus 5 or O1 Preview?
As of Oct 14, 2026, Claude Opus 5 leads O1 Preview in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
Claude Opus 5 or O1 Preview for General LLM?
As of Oct 14, 2026, Claude Opus 5 leads O1 Preview in General LLM at #11 against #129.
Claude Opus 5 or O1 Preview for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads O1 Preview in Reasoning at #9 against #137.
Claude Opus 5 or O1 Preview for Science?
As of Oct 14, 2026, Claude Opus 5 leads O1 Preview in Science at #12 against #125.