# 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.

## 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 |

## Verdict

As of Nov 3, 2026, Claude Opus 5.5 leads Gemini 4 Carbon in 1 of 6 shared categories: Coding › Web dev.

- Which to pick, General LLM: As of Nov 3, 2026, Claude Opus 5.5 and Gemini 4 Carbon share #1 in General LLM.
- Which to pick, Reasoning: As of Nov 3, 2026, Claude Opus 5.5 and Gemini 4 Carbon share #1 in Reasoning.
- Which to pick, Coding › Web dev: As of Nov 3, 2026, Claude Opus 5.5 leads Gemini 4 Carbon in Coding › Web dev at #1 against #4.
- Which to pick, Long context: As of Nov 3, 2026, Claude Opus 5.5 and Gemini 4 Carbon share #1 in Long context.
- Which to pick, Factuality: As of Nov 3, 2026, Claude Opus 5.5 and Gemini 4 Carbon share #1 in Factuality.
- Which to pick, Legal: As of Nov 3, 2026, Gemini 4 Carbon leads Claude Opus 5.5 in Legal at #1 against #5.

As of Nov 3, 2026, Claude Opus 5.5 is tied for state of the art in General LLM (since Oct 20, 2026; sources LMArena Text (style-controlled, overall) and Vals Index; methodology v1.0).

As of Nov 3, 2026, Gemini 4 Carbon is leading, crown pending confirmation in General LLM (since Nov 3, 2026; sources Vals Index and LMArena Text (style-controlled, overall); methodology v1.0).

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