# Claude Opus 5.5 vs Gemini 3.1 Pro Preview

As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in 7 of 8 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Vision, Factuality, and Abstraction (ARC).

Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.

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

Claude Opus 5.5: closed weights.

Gemini 3.1 Pro Preview: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in General LLM at #2 against #15.
- Which to pick, Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Reasoning at #1 against #14.
- Which to pick, Science: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads Claude Opus 5.5 in Science at #7 against #31.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Coding › Web dev at #1 against #58.
- Which to pick, Long context: As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Long context at #1 against #12.
- Which to pick, Vision: As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Vision at #4 against #25.
- Which to pick, Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Factuality at #1 against #18.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Abstraction (ARC) at #1 against #2.

As of Oct 14, 2026, Claude Opus 5.5 is tied for state of the art in Reasoning (since Oct 2, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

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).