# Gemini 3.1 Pro Preview vs O3

As of Oct 14, 2026, Gemini 3.1 Pro Preview leads O3 in 7 of 7 shared categories: General LLM, Reasoning, Math, Science, Long context, Factuality, and Abstraction (ARC).

Gemini 3.1 Pro Preview: $4.5 per 1M blended tokens.

O3: $3.5 per 1M blended tokens.

Gemini 3.1 Pro Preview: closed weights.

O3: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads O3 in General LLM at #15 against #78.
- Which to pick, Reasoning: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads O3 in Reasoning at #14 against #90.
- Which to pick, Math: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads O3 in Math at #3 against #20.
- Which to pick, Science: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads O3 in Science at #7 against #67.
- Which to pick, Long context: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads O3 in Long context at #12 against #110.
- Which to pick, Factuality: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads O3 in Factuality at #18 against #105.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, Gemini 3.1 Pro Preview leads O3 in Abstraction (ARC) at #2 against #37.

As of Oct 14, 2026, Gemini 3.1 Pro Preview is state of the art on best per dollar in Math (since Oct 14, 2026; sources Humanity's Last Exam; methodology v1.0).

As of Oct 14, 2026, O3 is a former state-of-the-art holder in General LLM (since Jul 28, 2025; sources LMArena Text (style-controlled, overall); methodology v1.0).