# Gemini 3.1 Pro Preview vs Gemini 3.6 Flash

As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.6 Flash in 7 of 8 shared categories: General LLM, Reasoning, Science, Long context, Vision, Factuality, and Abstraction (ARC).

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

Gemini 3.6 Flash: $1.5 per 1M blended tokens.

Gemini 3.1 Pro Preview: closed weights.

Gemini 3.6 Flash: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.6 Flash in General LLM at #15 against #19.
- Which to pick, Reasoning: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.6 Flash in Reasoning at #14 against #25.
- Which to pick, Science: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.6 Flash in Science at #7 against #9.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Gemini 3.6 Flash leads Gemini 3.1 Pro Preview in Coding › Web dev at #41 against #63.
- Which to pick, Long context: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.6 Flash in Long context at #12 against #30.
- Which to pick, Vision: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.6 Flash in Vision at #25 against #29.
- Which to pick, Factuality: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.6 Flash in Factuality at #21 against #23.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.6 Flash in Abstraction (ARC) at #2 against #13.

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 3.6 Flash is ranked #9 in Science (since Oct 15, 2026; sources GPQA Diamond; methodology v1.0).