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
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
Gemini 3.1 Pro Preview
Yes. Yes on Math (best per dollar). Not the overall leader.
| Category | Claude Opus 5.5 | Gemini 3.1 Pro Preview |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #15 · Was SOTA · General LLM Margin 10.204081632653057 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #14 · Was SOTA · Reasoning Margin 10.273972602739732 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #3 · Near-SOTA · Math Margin 4.444444444444443 Epoch AI benchmarking hub · Feb 19, 2026 |
| Science | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #7 · #7 in Science Margin — Epoch AI benchmarking hub · Feb 19, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #58 · #58 in Coding › Web dev Margin 53.271028037383175 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #12 · Was SOTA · Long context Margin 8.163265306122454 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | #25 · Was SOTA · Vision Margin 68.42105263157896 Epoch AI benchmarking hub · Feb 19, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #18 · #18 in Factuality Margin 14.179104477611943 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #2 · #2 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Feb 19, 2026 |
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.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in General LLM at #2 against #15.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Reasoning at #1 against #14.
Science: As of Oct 14, 2026, Gemini 3.1 Pro Preview leads Claude Opus 5.5 in Science at #7 against #31.
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.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Long context at #1 against #12.
Vision: As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Vision at #4 against #25.
Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Factuality at #1 against #18.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Abstraction (ARC) at #1 against #2.
Claude Opus 5.5 · Gemini 3.1 Pro Preview
Claude Opus 5.5 or 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 or Gemini 3.1 Pro Preview for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in General LLM at #2 against #15.
Claude Opus 5.5 or Gemini 3.1 Pro Preview for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads Gemini 3.1 Pro Preview in Reasoning at #1 against #14.
Claude Opus 5.5 or Gemini 3.1 Pro Preview for Science?
As of Oct 14, 2026, Gemini 3.1 Pro Preview leads Claude Opus 5.5 in Science at #7 against #31.