# Gemini 3.1 Pro Preview vs Grok 4.3

As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Grok 4.3 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Vision, and Factuality.

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

Grok 4.3: $1.5625000000000002 per 1M blended tokens.

Gemini 3.1 Pro Preview: closed weights.

Grok 4.3: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Grok 4.3 in General LLM at #15 against #85.
- Which to pick, Reasoning: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Grok 4.3 in Reasoning at #14 against #96.
- Which to pick, Science: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Grok 4.3 in Science at #7 against #41.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Grok 4.3 in Coding › Web dev at #63 against #95.
- Which to pick, Long context: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Grok 4.3 in Long context at #12 against #94.
- Which to pick, Vision: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Grok 4.3 in Vision at #25 against #32.
- Which to pick, Factuality: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Grok 4.3 in Factuality at #21 against #111.

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, Grok 4.3 is ranked #32 in Vision (since Oct 15, 2026; sources GDP.pdf; methodology v1.0).