Claude Sonnet 5.5 vs Gemini 4 Carbon
As of Nov 3, 2026, Claude Sonnet 5.5 leads Gemini 4 Carbon in 1 of 6 shared categories: Coding › Web dev.
Claude Sonnet 5.5
Yes. SOTA in Coding (tied), Coding › Agentic (tied), and Vision (tied).
Gemini 4 Carbon
Too new. Too new to call. The crown still needs confirming evidence.
| Category | Claude Sonnet 5.5 | Gemini 4 Carbon |
|---|---|---|
| General LLM | #17 · Near-SOTA · General LLM Margin 9.890109890109883 Vals AI · Nov 3, 2026 | #1 · Leading · crown pending Margin 0 Vals AI · Nov 3, 2026 |
| Reasoning | #19 · #19 in Reasoning Margin 11.904761904761898 LMArena leaderboard dataset · Oct 28, 2026 | #1 · Leading · crown pending Margin 0 LMArena leaderboard dataset · Oct 28, 2026 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | — |
| Science | #3 · #3 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 | #3 · Near-SOTA · Coding › Web dev Margin 1.5625 LMArena leaderboard dataset · Oct 28, 2026 | #4 · Pending · Coding › Web dev Margin 2.34375 LMArena leaderboard dataset · Oct 28, 2026 |
| Long context | #12 · #12 in Long context Margin 7.738095238095241 LMArena leaderboard dataset · Oct 28, 2026 | #1 · Leading · crown pending Margin 0 LMArena leaderboard dataset · Oct 28, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | — |
| Factuality | #19 · #19 in Factuality Margin 11.65644171779141 LMArena leaderboard dataset · Oct 28, 2026 | #1 · Leading · crown pending Margin 0 LMArena leaderboard dataset · Oct 28, 2026 |
| Abstraction (ARC) | #4 · #4 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 28, 2026 | — |
| Cybersecurity | #6 · #6 in Cybersecurity Margin 18.75 Vals AI · Oct 27, 2026 | — |
| Legal | #8 · #8 in Legal Margin — Vals AI · Nov 3, 2026 | #1 · Pending · Legal Margin — Vals AI · Nov 3, 2026 |
Pricing
Claude Sonnet 5.5: $4 per 1M blended tokens.
Gemini 4 Carbon: price per 1M tokens is unset in the catalog.
Claude Sonnet 5.5: closed weights.
Gemini 4 Carbon: closed weights.
Benchmarks side by side
| Benchmark | Claude Sonnet 5.5 | Gemini 4 Carbon |
|---|---|---|
| Excel Modeling Benchmark (EMB) | 75.9 | 76.5 |
| Finance Agent | 67.3 | 67.2 |
| Legal Research Bench | 48.1 | 55.8 |
| LMArena Text (style-controlled, coding) | 1529 | 1573 |
| LMArena Text (style-controlled, hard prompts) | 1505 | 1548 |
| LMArena Text (style-controlled, longer query) | 1499 | 1542 |
| LMArena Text (style-controlled, overall) | 1477 | 1528 |
| LMArena Text factuality | 1476 | 1522 |
| LMArena WebDev | 1770 | 1768 |
| Tax Agent Bench | 42.0 | 51.8 |
| Vals Index | 70.9 | 70.5 |
| Vibe Code Bench | 92.4 | 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 Sonnet 5.5 leads Gemini 4 Carbon in 1 of 6 shared categories: Coding › Web dev.
General LLM: As of Nov 3, 2026, Gemini 4 Carbon leads Claude Sonnet 5.5 in General LLM at #1 against #17.
Reasoning: As of Nov 3, 2026, Gemini 4 Carbon leads Claude Sonnet 5.5 in Reasoning at #1 against #19.
Coding › Web dev: As of Nov 3, 2026, Claude Sonnet 5.5 leads Gemini 4 Carbon in Coding › Web dev at #3 against #4.
Long context: As of Nov 3, 2026, Gemini 4 Carbon leads Claude Sonnet 5.5 in Long context at #1 against #12.
Factuality: As of Nov 3, 2026, Gemini 4 Carbon leads Claude Sonnet 5.5 in Factuality at #1 against #19.
Legal: As of Nov 3, 2026, Gemini 4 Carbon leads Claude Sonnet 5.5 in Legal at #1 against #8.
Claude Sonnet 5.5 · Gemini 4 Carbon
Claude Sonnet 5.5 or Gemini 4 Carbon?
As of Nov 3, 2026, Claude Sonnet 5.5 leads Gemini 4 Carbon in 1 of 6 shared categories: Coding › Web dev.
Claude Sonnet 5.5 or Gemini 4 Carbon for General LLM?
As of Nov 3, 2026, Gemini 4 Carbon leads Claude Sonnet 5.5 in General LLM at #1 against #17.
Claude Sonnet 5.5 or Gemini 4 Carbon for Reasoning?
As of Nov 3, 2026, Gemini 4 Carbon leads Claude Sonnet 5.5 in Reasoning at #1 against #19.
Claude Sonnet 5.5 or Gemini 4 Carbon for Coding › Web dev?
As of Nov 3, 2026, Claude Sonnet 5.5 leads Gemini 4 Carbon in Coding › Web dev at #3 against #4.