Claude Opus 5.5 vs Gemini 4 Carbon
As of Nov 3, 2026, Claude Opus 5.5 leads Gemini 4 Carbon in 1 of 6 shared categories: Coding › Web dev.
Claude Opus 5.5
Yes. SOTA in General LLM (tied), Reasoning (tied), Coding (tied), Coding › Agentic (tied), Coding › Web dev, Long context (tied), and Factuality (tied).
Gemini 4 Carbon
Too new. Too new to call. The crown still needs confirming evidence.
| Category | Claude Opus 5.5 | Gemini 4 Carbon |
|---|---|---|
| General LLM | #1 · Co-SOTA · General LLM Margin 0 LMArena leaderboard dataset · Nov 3, 2026 | #1 · Leading · crown pending Margin 0 Vals AI · Nov 3, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 28, 2026 | #1 · Leading · crown pending Margin 0 LMArena leaderboard dataset · Oct 28, 2026 |
| Science | #2 · #2 in Science Margin — Vals AI · Oct 30, 2026 | — |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Nov 3, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 28, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 23, 2026 | — |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 28, 2026 | #4 · Pending · Coding › Web dev Margin 2.34375 LMArena leaderboard dataset · Oct 28, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 28, 2026 | #1 · Leading · crown pending Margin 0 LMArena leaderboard dataset · Oct 28, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | — |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 28, 2026 | #1 · Leading · crown pending Margin 0 LMArena leaderboard dataset · Oct 28, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | — |
| Cybersecurity | #4 · #4 in Cybersecurity Margin 9.375 Vals AI · Oct 27, 2026 | — |
| Finance | #1 · #1 in Finance Margin — Vals AI · Oct 31, 2026 | — |
| Legal | #5 · #5 in Legal Margin — Vals AI · Nov 3, 2026 | #1 · Pending · Legal Margin — Vals AI · Nov 3, 2026 |
Pricing
Claude Opus 5.5: $8 per 1M blended tokens.
Gemini 4 Carbon: price per 1M tokens is unset in the catalog.
Claude Opus 5.5: closed weights.
Gemini 4 Carbon: closed weights.
Benchmarks side by side
| Benchmark | Claude Opus 5.5 | Gemini 4 Carbon |
|---|---|---|
| Excel Modeling Benchmark (EMB) | 75.8 | 76.5 |
| Finance Agent | 67.8 | 67.2 |
| Legal Research Bench | 50.5 | 55.8 |
| LMArena Text (style-controlled, coding) | 1551 | 1573 |
| LMArena Text (style-controlled, hard prompts) | 1535 | 1548 |
| LMArena Text (style-controlled, longer query) | 1525 | 1542 |
| LMArena Text (style-controlled, overall) | 1509 | 1528 |
| LMArena Text factuality | 1509 | 1522 |
| LMArena WebDev | 1810 | 1768 |
| Tax Agent Bench | 45.6 | 51.8 |
| Vals Index | 70.2 | 70.5 |
| Vibe Code Bench | 90.3 | 89.1 |
Latest validated result for each model. Benchmarks where only one model has a result are left out.
Verdict
As of Nov 3, 2026, Claude Opus 5.5 leads Gemini 4 Carbon in 1 of 6 shared categories: Coding › Web dev.
General LLM: As of Nov 3, 2026, Claude Opus 5.5 and Gemini 4 Carbon share #1 in General LLM.
Reasoning: As of Nov 3, 2026, Claude Opus 5.5 and Gemini 4 Carbon share #1 in Reasoning.
Coding › Web dev: As of Nov 3, 2026, Claude Opus 5.5 leads Gemini 4 Carbon in Coding › Web dev at #1 against #4.
Long context: As of Nov 3, 2026, Claude Opus 5.5 and Gemini 4 Carbon share #1 in Long context.
Factuality: As of Nov 3, 2026, Claude Opus 5.5 and Gemini 4 Carbon share #1 in Factuality.
Legal: As of Nov 3, 2026, Gemini 4 Carbon leads Claude Opus 5.5 in Legal at #1 against #5.
Claude Opus 5.5 · Gemini 4 Carbon
Claude Opus 5.5 or Gemini 4 Carbon?
As of Nov 3, 2026, Claude Opus 5.5 leads Gemini 4 Carbon in 1 of 6 shared categories: Coding › Web dev.
Claude Opus 5.5 or Gemini 4 Carbon for General LLM?
As of Nov 3, 2026, Claude Opus 5.5 and Gemini 4 Carbon share #1 in General LLM.
Claude Opus 5.5 or Gemini 4 Carbon for Reasoning?
As of Nov 3, 2026, Claude Opus 5.5 and Gemini 4 Carbon share #1 in Reasoning.
Claude Opus 5.5 or Gemini 4 Carbon for Coding › Web dev?
As of Nov 3, 2026, Claude Opus 5.5 leads Gemini 4 Carbon in Coding › Web dev at #1 against #4.