# Claude 3.5 Sonnet vs Grok 3

> Grok 3 is the stronger model overall, scoring 39.6 to 34.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-5-sonnet-vs-grok-3
- Last updated: 2026-10-10
- Shared benchmarks: 35

## Summary

- They share 35 benchmarks with published results for both. Claude 3.5 Sonnet scores higher in 3 categories and Grok 3 in 6 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Grok 3 leads 36.2 to 18.0.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 8.5% for Claude 3.5 Sonnet and 55.6% for Grok 3.

## Snapshot

| | Claude 3.5 Sonnet | Grok 3 |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 34.4 | 39.6 |
| Rank | 225 | 150 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3.5 Sonnet: 39.5 (#145)
- Grok 3: 41.5 (#113)

| Benchmark | Claude 3.5 Sonnet | Grok 3 |
|---|---|---|
| Aider Polyglot | 51.6% | 53.3% |
| WeirdML | 40% | 37.2% |
| LMArena Coding | 1343 | 1432 |
| GSO | 4.6% | — |
| BigCodeBench Instruct | 46.8% | — |
| LiveBench Coding | 67.1% | — |
| BigCodeBench Complete | 58.6% | — |
| CadEval | 48% | — |
| HumanEval+ | 81.7% | — |
| MBPP+ | 74.3% | — |

## Agentic & Tool Use

- Claude 3.5 Sonnet: 32.1 (#61)
- Grok 3: 30.2 (#69)

| Benchmark | Claude 3.5 Sonnet | Grok 3 |
|---|---|---|
| BALROG | 32.6% | 29.5% |
| TheAgentCompany | 24% | — |
| Cybench | 17.5% | — |
| METR Time Horizons | 45.2% | — |

## Reasoning

- Claude 3.5 Sonnet: 22.5 (#176)
- Grok 3: 13.8 (#322)

| Benchmark | Claude 3.5 Sonnet | Grok 3 |
|---|---|---|
| SimpleBench | 41.4% | 36.1% |
| LMArena Hard Prompts | 1305 | 1433 |
| Epoch Capabilities Index | 133.55 | 138.34 |
| ARC-AGI-2 | — | 0% |
| Kagi LLM Benchmark | — | 61.3% |
| ARC-AGI-1 | — | 5.5% |
| EnigmaEval | 0.9% | — |
| LiveBench Reasoning | 56.7% | — |
| DTBench | 67.8% | — |
| LiveBench Data Analysis | 55% | — |
| ForecastBench | 60.7 | — |
| LiveBench | 59% | — |

## Math

- Claude 3.5 Sonnet: 18.0 (#282)
- Grok 3: 36.2 (#122)

| Benchmark | Claude 3.5 Sonnet | Grok 3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 8.5% | 55.6% |
| Omni-MATH | 27.6% | 46.4% |
| LMArena Math | 1306 | 1390 |
| MATH Level 5 | 56.9% | 88.7% |
| FrontierMath (Feb 2025 set) | 2.1% | 3.8% |
| FrontierMath Tier 4 (v1) | 0% | 0% |
| LiveBench Math | 52.3% | — |

## Knowledge

- Claude 3.5 Sonnet: 28.5 (#236)
- Grok 3: 46.0 (#76)

| Benchmark | Claude 3.5 Sonnet | Grok 3 |
|---|---|---|
| GPQA Diamond | 55.3% | 75.8% |
| MMLU-Pro | 77.7% | 78.8% |
| Confabulations | 19.9% | 14.2% |
| GPQA (HELM) | 56.5% | 65% |
| LMArena Expert | 1264 | 1420 |
| Humanity's Last Exam | 4.1% | — |
| Vectara Hallucination Rate | — | 5.8% |
| MMLU | 87.3% | — |

## Multimodal

- Claude 3.5 Sonnet: 26.0 (#115)
- Grok 3: —

| Benchmark | Claude 3.5 Sonnet | Grok 3 |
|---|---|---|
| LMArena Vision | 1125 | — |
| Video-MME | 60% | — |
| GeoBench | 62% | — |
| VPCT | 33% | — |

## Multilingual

- Claude 3.5 Sonnet: 43.4 (#180)
- Grok 3: 52.5 (#81)

| Benchmark | Claude 3.5 Sonnet | Grok 3 |
|---|---|---|
| LMArena Non-English | 1283 | 1411 |
| LMArena Chinese | 1271 | 1448 |
| LMArena French | 1304 | 1460 |
| LMArena German | 1297 | 1431 |
| LMArena Japanese | 1234 | 1389 |
| LMArena Korean | 1200 | 1374 |
| LMArena Russian | 1305 | 1416 |
| LMArena Spanish | 1289 | 1417 |

## Instruction Following

- Claude 3.5 Sonnet: 69.0 (#177)
- Grok 3: 75.2 (#69)

| Benchmark | Claude 3.5 Sonnet | Grok 3 |
|---|---|---|
| IFEval | 85.5% | 88.4% |
| LMArena Instruction Following | 1297 | 1409 |
| LiveBench Instruction Following | 69.3% | — |

## Long Context

- Claude 3.5 Sonnet: 39.9 (#162)
- Grok 3: 38.7 (#187)

| Benchmark | Claude 3.5 Sonnet | Grok 3 |
|---|---|---|
| LMArena Longer Query | 1311 | 1439 |
| Fiction.LiveBench | — | 58.3% |

## Writing & Preference

- Claude 3.5 Sonnet: 53.0 (#159)
- Grok 3: 56.0 (#136)

| Benchmark | Claude 3.5 Sonnet | Grok 3 |
|---|---|---|
| LMArena Text | 1298 | 1426 |
| LMArena Creative Writing | 1292 | 1414 |
| Short-Story Creative Writing | 80.3% | 76.4% |
| EQ-Bench Creative Writing | 1451 | 1186 |
| WildBench | 79.2% | 84.9% |
| LMArena Multi-Turn | 1326 | 1424 |
| LiveBench Language | 53.8% | — |

## FAQ

### Is Claude 3.5 Sonnet better than Grok 3?

Grok 3 is the stronger model overall, scoring 39.6 to 34.4 on the Noometry Index.

### Is Claude 3.5 Sonnet or Grok 3 better for coding?

Grok 3 scores higher on coding benchmarks: 41.5 versus 39.5 in the Noometry coding category.

### How many benchmarks do Claude 3.5 Sonnet and Grok 3 share?

35 benchmarks have published results for both models. Claude 3.5 Sonnet has 60 scored results on Noometry and Grok 3 has 40.