GPT-5.5 vs O3 Mini
As of Oct 15, 2026, GPT-5.5 leads O3 Mini in 4 of 5 shared categories: Reasoning, Science, Long context, and Abstraction (ARC).
| Category | GPT-5.5 | O3 Mini |
|---|---|---|
| General LLM | #22 · Was SOTA · General LLM Margin 11.702127659574472 LMArena leaderboard dataset · Oct 13, 2026 | #10 · #10 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #26 · #26 in Reasoning Margin 14.36170212765957 LMArena leaderboard dataset · Oct 13, 2026 | #172 · Was SOTA · Reasoning Margin 92.02127659574468 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 | #76 · #76 in Science Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| 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 | #186 · #186 in Long context Margin 98.93617021276596 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 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | #7 · #7 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 23, 2026 | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
GPT-5.5: $11.25 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
GPT-5.5: closed weights.
O3 Mini: closed weights.
General LLM: As of Oct 15, 2026, O3 Mini leads GPT-5.5 in General LLM at #10 against #22.
Reasoning: As of Oct 15, 2026, GPT-5.5 leads O3 Mini in Reasoning at #26 against #172.
Science: As of Oct 15, 2026, GPT-5.5 leads O3 Mini in Science at #30 against #76.
Long context: As of Oct 15, 2026, GPT-5.5 leads O3 Mini in Long context at #26 against #186.
Abstraction (ARC): As of Oct 15, 2026, GPT-5.5 leads O3 Mini in Abstraction (ARC) at #7 against #51.
GPT-5.5 or O3 Mini?
As of Oct 15, 2026, GPT-5.5 leads O3 Mini in 4 of 5 shared categories: Reasoning, Science, Long context, and Abstraction (ARC).
GPT-5.5 or O3 Mini for General LLM?
As of Oct 15, 2026, O3 Mini leads GPT-5.5 in General LLM at #10 against #22.
GPT-5.5 or O3 Mini for Reasoning?
As of Oct 15, 2026, GPT-5.5 leads O3 Mini in Reasoning at #26 against #172.
GPT-5.5 or O3 Mini for Science?
As of Oct 15, 2026, GPT-5.5 leads O3 Mini in Science at #30 against #76.