GPT-5.5 vs O1
As of Oct 14, 2026, GPT-5.5 leads O1 in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
| Category | GPT-5.5 | O1 |
|---|---|---|
| General LLM | #21 · Was SOTA · General LLM Margin 14.285714285714292 LMArena leaderboard dataset · Oct 13, 2026 | #112 · Was SOTA · General LLM Margin 76.19047619047619 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #25 · #25 in Reasoning Margin 17.808219178082197 LMArena leaderboard dataset · Oct 13, 2026 | #117 · Was SOTA · Reasoning Margin 80.82191780821918 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #34 · #34 in Math Margin 75.55555555555556 Epoch AI benchmarking hub · Dec 17, 2024 |
| Science | #30 · #30 in Science Margin — Epoch AI benchmarking hub · Apr 23, 2026 | #77 · #77 in Science Margin — Epoch AI benchmarking hub · Dec 17, 2024 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #44 · #44 in Coding › Web dev Margin 40.18691588785047 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #23 · Was SOTA · Long context Margin 15.646258503401356 LMArena leaderboard dataset · Oct 13, 2026 | #108 · Was SOTA · Long context Margin 73.46938775510205 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #5 · Was SOTA · Factuality Margin 4.477611940298502 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Dec 17, 2024 |
| Abstraction (ARC) | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 | #57 · #57 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Dec 17, 2024 |
GPT-5.5: $11.25 per 1M blended tokens.
O1: $26.25 per 1M blended tokens.
GPT-5.5: closed weights.
O1: closed weights.
General LLM: As of Oct 14, 2026, GPT-5.5 leads O1 in General LLM at #21 against #112.
Reasoning: As of Oct 14, 2026, GPT-5.5 leads O1 in Reasoning at #25 against #117.
Science: As of Oct 14, 2026, GPT-5.5 leads O1 in Science at #30 against #77.
Long context: As of Oct 14, 2026, GPT-5.5 leads O1 in Long context at #23 against #108.
Abstraction (ARC): As of Oct 14, 2026, GPT-5.5 leads O1 in Abstraction (ARC) at #7 against #57.
GPT-5.5 or O1?
As of Oct 14, 2026, GPT-5.5 leads O1 in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
GPT-5.5 or O1 for General LLM?
As of Oct 14, 2026, GPT-5.5 leads O1 in General LLM at #21 against #112.
GPT-5.5 or O1 for Reasoning?
As of Oct 14, 2026, GPT-5.5 leads O1 in Reasoning at #25 against #117.
GPT-5.5 or O1 for Science?
As of Oct 14, 2026, GPT-5.5 leads O1 in Science at #30 against #77.