# Gemini 3.1 Pro Preview vs Gemini 3 Flash Preview

As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3 Flash Preview in 3 of 3 shared categories: Science, Vision, and Abstraction (ARC).

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

Gemini 3 Flash Preview: $1.125 per 1M blended tokens.

Gemini 3.1 Pro Preview: closed weights.

Gemini 3 Flash Preview: closed weights.

- Which to pick, Science: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3 Flash Preview in Science at #7 against #39.
- Which to pick, Vision: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3 Flash Preview in Vision at #25 against #31.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3 Flash Preview in Abstraction (ARC) at #2 against #25.

As of Oct 15, 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 15, 2026, Gemini 3 Flash Preview is ranked #25 in Abstraction (ARC) (since Oct 15, 2026; sources ARC-AGI; methodology v1.0).