Gemini 2.5 Flash vs O3 Mini
As of Oct 14, 2026, Gemini 2.5 Flash leads O3 Mini in 2 of 3 shared categories: Reasoning and Long context.
Gemini 2.5 Flash
#72 Best current rank: #72 in Factuality, as of Oct 14, 2026.
O3 Mini
It used to be. Was SOTA in Reasoning.
| Category | Gemini 2.5 Flash | O3 Mini |
|---|---|---|
| General LLM | #108 · #108 in General LLM Margin 73.46938775510205 LMArena leaderboard dataset · Oct 13, 2026 | #7 · #7 in General LLM Margin — LMArena leaderboard dataset · Apr 16, 2025 |
| Reasoning | #114 · #114 in Reasoning Margin 78.76712328767124 LMArena leaderboard dataset · Oct 13, 2026 | #133 · Was SOTA · Reasoning Margin 91.78082191780823 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 | — | #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 |
| Long context | #104 · #104 in Long context Margin 70.74829931972789 LMArena leaderboard dataset · Oct 13, 2026 | #145 · #145 in Long context Margin 98.63945578231292 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | — |
| Factuality | #72 · #72 in Factuality Margin 54.47761194029851 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
| Abstraction (ARC) | — | #51 · #51 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jan 31, 2025 |
Gemini 2.5 Flash: $0.85 per 1M blended tokens.
O3 Mini: $1.9250000000000003 per 1M blended tokens.
Gemini 2.5 Flash: closed weights.
O3 Mini: closed weights.
General LLM: As of Oct 14, 2026, O3 Mini leads Gemini 2.5 Flash in General LLM at #7 against #108.
Reasoning: As of Oct 14, 2026, Gemini 2.5 Flash leads O3 Mini in Reasoning at #114 against #133.
Long context: As of Oct 14, 2026, Gemini 2.5 Flash leads O3 Mini in Long context at #104 against #145.
Gemini 2.5 Flash or O3 Mini?
As of Oct 14, 2026, Gemini 2.5 Flash leads O3 Mini in 2 of 3 shared categories: Reasoning and Long context.
Gemini 2.5 Flash or O3 Mini for General LLM?
As of Oct 14, 2026, O3 Mini leads Gemini 2.5 Flash in General LLM at #7 against #108.
Gemini 2.5 Flash or O3 Mini for Reasoning?
As of Oct 14, 2026, Gemini 2.5 Flash leads O3 Mini in Reasoning at #114 against #133.
Gemini 2.5 Flash or O3 Mini for Long context?
As of Oct 14, 2026, Gemini 2.5 Flash leads O3 Mini in Long context at #104 against #145.