# Claude Opus 4.5 vs Gemini 3.1 Pro Preview

As of Oct 15, 2026, Claude Opus 4.5 leads Gemini 3.1 Pro Preview in 1 of 8 shared categories: Coding › Web dev.

Claude Opus 4.5: $10 per 1M blended tokens.

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

Claude Opus 4.5: 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 Claude Opus 4.5 in General LLM at #15 against #41.
- Which to pick, Reasoning: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Claude Opus 4.5 in Reasoning at #14 against #30.
- Which to pick, Math: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Claude Opus 4.5 in Math at #3 against #16.
- Which to pick, Science: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Claude Opus 4.5 in Science at #7 against #68.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Opus 4.5 leads Gemini 3.1 Pro Preview in Coding › Web dev at #58 against #63.
- Which to pick, Long context: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Claude Opus 4.5 in Long context at #12 against #20.
- Which to pick, Factuality: As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Claude Opus 4.5 in Factuality at #21 against #40.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Gemini 3.1 Pro Preview leads Claude Opus 4.5 in Abstraction (ARC) at #2 against #49.

As of Oct 15, 2026, Claude Opus 4.5 is a former state-of-the-art holder in Reasoning (since Dec 1, 2025; sources LMArena Text (style-controlled, hard prompts); 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).