# Gemini 3.1 Pro Preview vs GPT-5.5

As of Oct 14, 2026, Gemini 3.1 Pro Preview leads GPT-5.5 in 5 of 8 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).

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

GPT-5.5: $11.25 per 1M blended tokens.

Gemini 3.1 Pro Preview: closed weights.

GPT-5.5: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads GPT-5.5 in General LLM at #15 against #21.
- Which to pick, Reasoning: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads GPT-5.5 in Reasoning at #14 against #25.
- Which to pick, Science: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads GPT-5.5 in Science at #7 against #30.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, GPT-5.5 leads Gemini 3.1 Pro Preview in Coding › Web dev at #44 against #58.
- Which to pick, Long context: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads GPT-5.5 in Long context at #12 against #23.
- Which to pick, Vision: As of Oct 14, 2026, GPT-5.5 leads Gemini 3.1 Pro Preview in Vision at #10 against #25.
- Which to pick, Factuality: As of Oct 14, 2026, GPT-5.5 leads Gemini 3.1 Pro Preview in Factuality at #5 against #18.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, Gemini 3.1 Pro Preview leads GPT-5.5 in Abstraction (ARC) at #2 against #7.

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, GPT-5.5 is a former state-of-the-art holder in General LLM (since Apr 28, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).