GPT-5.5 vs O1 Preview
As of Oct 15, 2026, GPT-5.5 leads O1 Preview in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
| Category | GPT-5.5 | O1 Preview |
|---|---|---|
| General LLM | #22 · Was SOTA · General LLM Margin 11.702127659574472 LMArena leaderboard dataset · Oct 13, 2026 | #166 · Was SOTA · General LLM Margin 88.29787234042553 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #26 · #26 in Reasoning Margin 14.36170212765957 LMArena leaderboard dataset · Oct 13, 2026 | #177 · Was SOTA · Reasoning Margin 94.68085106382979 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 | #30 · #30 in Science Margin — Epoch AI benchmarking hub · Apr 23, 2026 | #125 · #125 in Science Margin — Epoch AI benchmarking hub · Sep 12, 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 | #48 · #48 in Coding › Web dev Margin 37.6 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #26 · Was SOTA · Long context Margin 13.829787234042556 LMArena leaderboard dataset · Oct 13, 2026 | #176 · Was SOTA · Long context Margin 93.61702127659575 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #10 · Was SOTA · Vision Margin 28.94736842105263 Epoch AI benchmarking hub · Apr 23, 2026 | — |
| Factuality | #5 · Near-SOTA · Factuality Margin 3.4883720930232442 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Abstraction (ARC) | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 | #73 · #73 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 12, 2024 |
GPT-5.5: $11.25 per 1M blended tokens.
O1 Preview: price per 1M tokens is unset in the catalog.
GPT-5.5: closed weights.
O1 Preview: closed weights.
General LLM: As of Oct 15, 2026, GPT-5.5 leads O1 Preview in General LLM at #22 against #166.
Reasoning: As of Oct 15, 2026, GPT-5.5 leads O1 Preview in Reasoning at #26 against #177.
Science: As of Oct 15, 2026, GPT-5.5 leads O1 Preview in Science at #30 against #125.
Long context: As of Oct 15, 2026, GPT-5.5 leads O1 Preview in Long context at #26 against #176.
Abstraction (ARC): As of Oct 15, 2026, GPT-5.5 leads O1 Preview in Abstraction (ARC) at #7 against #73.
GPT-5.5 or O1 Preview?
As of Oct 15, 2026, GPT-5.5 leads O1 Preview in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
GPT-5.5 or O1 Preview for General LLM?
As of Oct 15, 2026, GPT-5.5 leads O1 Preview in General LLM at #22 against #166.
GPT-5.5 or O1 Preview for Reasoning?
As of Oct 15, 2026, GPT-5.5 leads O1 Preview in Reasoning at #26 against #177.
GPT-5.5 or O1 Preview for Science?
As of Oct 15, 2026, GPT-5.5 leads O1 Preview in Science at #30 against #125.