# Claude Sonnet 5.5 vs Gemini 2.5 Pro

> Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 44.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-5-vs-gemini-2-5-pro
- Last updated: 2026-10-10
- Shared benchmarks: 8

## Summary

- They share 8 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 6 categories and Gemini 2.5 Pro in 0 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 31.9.
- The biggest single-benchmark swing is FrontierMath Tier 4: 80.5% for Claude Sonnet 5.5 and 0% for Gemini 2.5 Pro.
- Gemini 2.5 Pro is cheaper at $1.25 / $10 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
- Gemini 2.5 Pro accepts more context: 1.05M tokens versus 1M.

## Snapshot

| | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| Provider | Anthropic | Google |
| Noometry Index | 60.5 | 44.9 |
| Rank | 10 | 67 |
| Context | 1M | 1.05M |
| Input $/M | $2 | $1.25 |
| Output $/M | $10 | $10 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Sonnet 5.5: 65.5 (#6)
- Gemini 2.5 Pro: 42.8 (#86)

| Benchmark | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| LMArena WebDev | 1699 | 1227 |
| SciCode | 61% | 42.8% |
| ALE-Bench | 1,819 | 785.52 |
| SWE-bench Verified | — | 57.6% |
| FrontierCode | 52.1% | — |
| SWE-bench Verified (bash only) | — | 53.6% |
| Aider Polyglot | — | 83.1% |
| CursorBench | 55.5% | — |
| FrontierSWE | 61.9% | — |
| GSO | — | 3.9% |
| WeirdML | — | 54% |
| LiveBench Coding | — | 85.9% |
| LMArena Coding | — | 1452 |
| CadEval | — | 64% |
| AlgoTune | — | 1.51 |

## Agentic & Tool Use

- Claude Sonnet 5.5: 44.9 (#14)
- Gemini 2.5 Pro: 29.1 (#81)

| Benchmark | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| Terminal-Bench | — | 32.6% |
| APEX-Agents | 75.5% | — |
| GDPval | — | 23.3% |
| Remote Labor Index | — | 0.8% |
| TheAgentCompany | — | 30.3% |
| τ²-bench Banking | — | 13.7% |
| DeepResearch Bench | — | 42.8% |
| BALROG | — | 43.3% |
| LMArena Search | — | 1142 |
| METR Time Horizons | — | 55.4% |
| Vending-Bench 2 | — | 573.64 |

## Reasoning

- Claude Sonnet 5.5: 52.4 (#29)
- Gemini 2.5 Pro: 28.8 (#85)

| Benchmark | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| CritPt | 31.4% | 2% |
| ARC-AGI-2 | — | 4.9% |
| SimpleBench | — | 62.4% |
| Kagi LLM Benchmark | — | 70.3% |
| ARC-AGI-1 | — | 41% |
| Chess Puzzles | — | 20% |
| EnigmaEval | — | 5.6% |
| LiveBench Reasoning | — | 89.8% |
| LMArena Hard Prompts | — | 1455 |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 82.4% |
| LiveBench Data Analysis | — | 79.9% |
| LMCA | — | 34.8% |
| Epoch Capabilities Index | — | 145.32 |
| ForecastBench | — | 61.3 |
| LiveBench | — | 82.3% |

## Math

- Claude Sonnet 5.5: 88.7 (#4)
- Gemini 2.5 Pro: 31.9 (#191)

| Benchmark | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | 24.6% |
| FrontierMath Tier 4 | 80.5% | 0% |
| OTIS Mock AIME 2024-2025 | 100% | 84.7% |
| ProofBench | 100% | — |
| Omni-MATH | — | 41.6% |
| LiveBench Math | — | 90.2% |
| LMArena Math | — | 1450 |
| MATH Level 5 | — | 95.9% |
| FrontierMath (Feb 2025 set) | — | 14.1% |
| FrontierMath Tier 4 (v1) | — | 4.2% |

## Knowledge

- Claude Sonnet 5.5: 66.0 (#11)
- Gemini 2.5 Pro: 55.8 (#41)

| Benchmark | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| GPQA Diamond | 95.6% | 85.3% |
| Humanity's Last Exam | — | 21.6% |
| SimpleQA Verified | 46.5% | — |
| MMLU-Pro | — | 86.3% |
| Confabulations | — | 10.6% |
| Vectara Hallucination Rate | — | 7% |
| GPQA (HELM) | — | 74.9% |
| LMArena Expert | — | 1452 |

## Multimodal

- Claude Sonnet 5.5: 53.2 (#5)
- Gemini 2.5 Pro: 44.5 (#16)

| Benchmark | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| LMArena Vision | — | 1263 |
| GeoBench | — | 86% |
| VPCT | — | 48% |
| Furniture Assembly | 75% | — |
| LMArena Document | — | 1421 |
| SpatialViz-Bench | — | 44.7% |

## Multilingual

- Claude Sonnet 5.5: —
- Gemini 2.5 Pro: 55.5 (#30)

| Benchmark | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| LMArena Non-English | — | 1452 |
| LMArena Chinese | — | 1507 |
| LMArena French | — | 1473 |
| LMArena German | — | 1487 |
| LMArena Japanese | — | 1462 |
| LMArena Korean | — | 1435 |
| LMArena Russian | — | 1460 |
| LMArena Spanish | — | 1473 |

## Instruction Following

- Claude Sonnet 5.5: —
- Gemini 2.5 Pro: 75.2 (#71)

| Benchmark | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| LiveBench Instruction Following | — | 80.6% |
| IFEval | — | 84% |
| LMArena Instruction Following | — | 1436 |

## Long Context

- Claude Sonnet 5.5: —
- Gemini 2.5 Pro: 59.7 (#5)

| Benchmark | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| Fiction.LiveBench | — | 91.7% |
| LMArena Longer Query | — | 1449 |

## Writing & Preference

- Claude Sonnet 5.5: —
- Gemini 2.5 Pro: 63.9 (#60)

| Benchmark | Claude Sonnet 5.5 | Gemini 2.5 Pro |
|---|---|---|
| LMArena Text | — | 1458 |
| LMArena Creative Writing | — | 1453 |
| Short-Story Creative Writing | — | 83.8% |
| EQ-Bench Creative Writing | — | 1421 |
| WildBench | — | 85.7% |
| LMArena Multi-Turn | — | 1453 |
| LiveBench Language | — | 67.8% |

## FAQ

### Is Claude Sonnet 5.5 better than Gemini 2.5 Pro?

Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 44.9 on the Noometry Index.

### Which is cheaper, Claude Sonnet 5.5 or Gemini 2.5 Pro?

Gemini 2.5 Pro is cheaper. It lists at $1.25 per million input tokens and $10 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.

### Is Claude Sonnet 5.5 or Gemini 2.5 Pro better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 42.8 in the Noometry coding category.

### Which has the bigger context window?

Gemini 2.5 Pro does, with 1.05M tokens against 1M.

### How many benchmarks do Claude Sonnet 5.5 and Gemini 2.5 Pro share?

8 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Gemini 2.5 Pro has 78.