# Gemini 3.1 Pro Preview vs Gemini 3.5 Flash Lite

As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.5 Flash Lite in 7 of 7 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 3.5 Flash Lite: $0.85 per 1M blended tokens.

Gemini 3.1 Pro Preview: closed weights.

Gemini 3.5 Flash Lite: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.5 Flash Lite in General LLM at #15 against #63.
- Which to pick, Reasoning: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.5 Flash Lite in Reasoning at #14 against #67.
- Which to pick, Science: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.5 Flash Lite in Science at #7 against #64.
- Which to pick, Long context: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.5 Flash Lite in Long context at #12 against #65.
- Which to pick, Vision: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.5 Flash Lite in Vision at #25 against #31.
- Which to pick, Factuality: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.5 Flash Lite in Factuality at #21 against #64.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 3.5 Flash Lite in Abstraction (ARC) at #2 against #42.

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 3.5 Flash Lite is ranked #31 in Vision (since Oct 15, 2026; sources GDP.pdf; methodology v1.0).