# Claude 3 Sonnet vs Gemini 3.8 Flash

> Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 29.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-sonnet-vs-gemini-3-8-flash
- Last updated: 2026-10-10
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. Claude 3 Sonnet scores higher in 0 categories and Gemini 3.8 Flash in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.8 Flash leads 76.9 to 20.5.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 3 Sonnet and 98.9% for Gemini 3.8 Flash.

## Snapshot

| | Claude 3 Sonnet | Gemini 3.8 Flash |
|---|---|---|
| Provider | Anthropic | Google |
| Noometry Index | 29.0 | 61.8 |
| Rank | 319 | 11 |
| Context | — | 1.05M |
| Input $/M | — | $0.75 |
| Output $/M | — | $3.75 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3 Sonnet: 29.6 (#302)
- Gemini 3.8 Flash: 59.2 (#15)

| Benchmark | Claude 3 Sonnet | Gemini 3.8 Flash |
|---|---|---|
| WeirdML | 10.2% | 84.8% |
| LMArena Coding | 1223 | 1510 |
| DeepSWE | — | 73.8% |
| FrontierCode | — | 41.2% |
| CursorBench | — | 39.6% |
| LMArena WebDev | — | 1584 |
| FrontierSWE | — | 19.6% |
| SciCode | — | 56.6% |
| BigCodeBench Instruct | 42.7% | — |
| BigCodeBench Complete | 53.8% | — |
| ALE-Bench | — | 1,270 |
| HumanEval+ | 64% | — |
| MBPP+ | 69.3% | — |

## Agentic & Tool Use

- Claude 3 Sonnet: —
- Gemini 3.8 Flash: 41.8 (#21)

| Benchmark | Claude 3 Sonnet | Gemini 3.8 Flash |
|---|---|---|
| APEX-Agents | — | 64.3% |
| Remote Labor Index | — | 5.8% |
| GDP.pdf | — | 23.4% |
| Vending-Bench 2 | — | 5,094 |

## Reasoning

- Claude 3 Sonnet: 20.5 (#237)
- Gemini 3.8 Flash: 76.9 (#5)

| Benchmark | Claude 3 Sonnet | Gemini 3.8 Flash |
|---|---|---|
| LMArena Hard Prompts | 1197 | 1508 |
| DTBench | 53.6% | 95.7% |
| Epoch Capabilities Index | 120.7 | 156.71 |
| ARC-AGI-2 | — | 89.2% |
| NYT Connections (extended) | — | 97.4% |
| ARC-AGI-1 | — | 98.5% |
| CritPt | — | 18.3% |
| Chess Puzzles | — | 61% |
| Mystery Game Puzzles | — | 47% |
| LMCA | — | 52.9% |
| Surface Evolver Bench | — | 76.9% |
| WinoGrande | 75.1% | — |

## Math

- Claude 3 Sonnet: 10.7 (#310)
- Gemini 3.8 Flash: 65.3 (#28)

| Benchmark | Claude 3 Sonnet | Gemini 3.8 Flash |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | 98.9% |
| LMArena Math | 1213 | 1528 |
| FrontierMath (Tiers 1-3) | — | 68.4% |
| FrontierMath Tier 4 | — | 22% |
| ProofBench | — | 48% |
| MATH Level 5 | 18.2% | — |

## Knowledge

- Claude 3 Sonnet: 21.1 (#276)
- Gemini 3.8 Flash: 74.8 (#2)

| Benchmark | Claude 3 Sonnet | Gemini 3.8 Flash |
|---|---|---|
| GPQA Diamond | 40.6% | 95.4% |
| LMArena Expert | 1173 | 1524 |
| Humanity's Last Exam | — | 44.5% |
| SimpleQA Verified | — | 69.7% |
| MMLU | 75.9% | — |

## Multimodal

- Claude 3 Sonnet: 25.2 (#125)
- Gemini 3.8 Flash: 40.7 (#45)

| Benchmark | Claude 3 Sonnet | Gemini 3.8 Flash |
|---|---|---|
| LMArena Vision | 984 | 1314 |
| Blueprint-Bench 2 | — | 38.6% |
| Furniture Assembly | — | 31.7% |

## Multilingual

- Claude 3 Sonnet: 37.8 (#234)
- Gemini 3.8 Flash: 58.0 (#5)

| Benchmark | Claude 3 Sonnet | Gemini 3.8 Flash |
|---|---|---|
| LMArena Non-English | 1205 | 1491 |
| LMArena Chinese | 1189 | 1554 |
| LMArena French | 1229 | 1498 |
| LMArena German | 1204 | 1493 |
| LMArena Japanese | 1131 | 1502 |
| LMArena Korean | 1128 | 1459 |
| LMArena Russian | 1227 | 1515 |
| LMArena Spanish | 1204 | 1485 |

## Instruction Following

- Claude 3 Sonnet: 62.8 (#235)
- Gemini 3.8 Flash: 78.0 (#13)

| Benchmark | Claude 3 Sonnet | Gemini 3.8 Flash |
|---|---|---|
| LMArena Instruction Following | 1199 | 1490 |

## Long Context

- Claude 3 Sonnet: 36.7 (#228)
- Gemini 3.8 Flash: 46.3 (#24)

| Benchmark | Claude 3 Sonnet | Gemini 3.8 Flash |
|---|---|---|
| LMArena Longer Query | 1211 | 1508 |

## Writing & Preference

- Claude 3 Sonnet: 42.1 (#238)
- Gemini 3.8 Flash: 72.2 (#15)

| Benchmark | Claude 3 Sonnet | Gemini 3.8 Flash |
|---|---|---|
| LMArena Text | 1218 | 1499 |
| LMArena Creative Writing | 1186 | 1492 |
| LMArena Multi-Turn | 1227 | 1501 |
| EQ-Bench Creative Writing | — | 1748 |

## FAQ

### Is Claude 3 Sonnet better than Gemini 3.8 Flash?

Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 29.0 on the Noometry Index.

### Is Claude 3 Sonnet or Gemini 3.8 Flash better for coding?

Gemini 3.8 Flash scores higher on coding benchmarks: 59.2 versus 29.6 in the Noometry coding category.

### How many benchmarks do Claude 3 Sonnet and Gemini 3.8 Flash share?

23 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and Gemini 3.8 Flash has 50.