# Gemini 2.5 Pro vs Gemini 3.1 Pro Preview

As of Oct 15, 2026, Gemini 2.5 Pro leads Gemini 3.1 Pro Preview in 0 of 7 shared categories.

Gemini 2.5 Pro: $3.4375000000000004 per 1M blended tokens.

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

Gemini 2.5 Pro: closed weights.

Gemini 3.1 Pro Preview: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 2.5 Pro in General LLM at #15 against #78.
- Which to pick, Reasoning: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 2.5 Pro in Reasoning at #14 against #92.
- Which to pick, Science: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 2.5 Pro in Science at #7 against #58.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 2.5 Pro in Coding › Web dev at #63 against #119.
- Which to pick, Long context: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 2.5 Pro in Long context at #12 against #72.
- Which to pick, Factuality: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 2.5 Pro in Factuality at #21 against #37.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Gemini 2.5 Pro in Abstraction (ARC) at #2 against #48.

As of Oct 15, 2026, Gemini 2.5 Pro is a former state-of-the-art holder in General LLM (since Oct 17, 2025; sources LMArena Text (style-controlled, overall); methodology v1.0).

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).