Claude Opus 5.5 vs O1 Mini
As of Oct 15, 2026, Claude Opus 5.5 leads O1 Mini in 3 of 3 shared categories: General LLM, Science, and Abstraction (ARC).
Claude Opus 5.5
Yes. SOTA in Reasoning (tied), Coding (tied), Coding › Agentic (tied), Coding › Web dev, Long context (tied), and Factuality (tied).
O1 Mini
It used to be. Was SOTA in Reasoning.
| Category | Claude Opus 5.5 | O1 Mini |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.0638297872340416 LMArena leaderboard dataset · Oct 13, 2026 | #11 · #11 in General LLM Margin — LMArena leaderboard dataset · Feb 6, 2025 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #— · Was SOTA · Reasoning Margin — LMArena leaderboard dataset · Mar 11, 2025 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Science | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #106 · #106 in Science Margin — Epoch AI benchmarking hub · Sep 12, 2024 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Mar 25, 2025 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Feb 11, 2025 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | — |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #79 · #79 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 12, 2024 |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
O1 Mini: price per 1M tokens is unset in the catalog.
Claude Opus 5.5: closed weights.
O1 Mini: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads O1 Mini in General LLM at #2 against #11.
Science: As of Oct 15, 2026, Claude Opus 5.5 leads O1 Mini in Science at #31 against #106.
Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5.5 leads O1 Mini in Abstraction (ARC) at #1 against #79.
Claude Opus 5.5 or O1 Mini?
As of Oct 15, 2026, Claude Opus 5.5 leads O1 Mini in 3 of 3 shared categories: General LLM, Science, and Abstraction (ARC).
Claude Opus 5.5 or O1 Mini for General LLM?
As of Oct 15, 2026, Claude Opus 5.5 leads O1 Mini in General LLM at #2 against #11.
Claude Opus 5.5 or O1 Mini for Science?
As of Oct 15, 2026, Claude Opus 5.5 leads O1 Mini in Science at #31 against #106.
Claude Opus 5.5 or O1 Mini for Abstraction (ARC)?
As of Oct 15, 2026, Claude Opus 5.5 leads O1 Mini in Abstraction (ARC) at #1 against #79.