# Claude 3 Sonnet vs Grok 3

> Grok 3 is the stronger model overall, scoring 39.9 to 29.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-sonnet-vs-grok-3
- Last updated: 2026-10-10
- Shared benchmarks: 22

## Summary

- They share 22 benchmarks with published results for both. Claude 3 Sonnet scores higher in 1 category and Grok 3 in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Grok 3 leads 38.0 to 10.7.
- The biggest single-benchmark swing is MATH Level 5: 18.2% for Claude 3 Sonnet and 88.7% for Grok 3.

## Snapshot

| | Claude 3 Sonnet | Grok 3 |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 29.0 | 39.9 |
| Rank | 319 | 157 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3 Sonnet: 29.6 (#302)
- Grok 3: 41.9 (#115)

| Benchmark | Claude 3 Sonnet | Grok 3 |
|---|---|---|
| WeirdML | 10.2% | 37.2% |
| LMArena Coding | 1223 | 1432 |
| Aider Polyglot | — | 53.3% |
| BigCodeBench Instruct | 42.7% | — |
| BigCodeBench Complete | 53.8% | — |
| HumanEval+ | 64% | — |
| MBPP+ | 69.3% | — |

## Agentic & Tool Use

- Claude 3 Sonnet: —
- Grok 3: 30.5 (#76)

| Benchmark | Claude 3 Sonnet | Grok 3 |
|---|---|---|
| BALROG | — | 29.5% |

## Reasoning

- Claude 3 Sonnet: 20.5 (#237)
- Grok 3: 13.7 (#333)

| Benchmark | Claude 3 Sonnet | Grok 3 |
|---|---|---|
| LMArena Hard Prompts | 1197 | 1434 |
| Epoch Capabilities Index | 120.7 | 138.33 |
| ARC-AGI-2 | — | 0% |
| SimpleBench | — | 36.1% |
| Kagi LLM Benchmark | — | 61.3% |
| ARC-AGI-1 | — | 5.5% |
| DTBench | 53.6% | — |
| WinoGrande | 75.1% | — |

## Math

- Claude 3 Sonnet: 10.7 (#310)
- Grok 3: 38.0 (#145)

| Benchmark | Claude 3 Sonnet | Grok 3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | 55.6% |
| LMArena Math | 1213 | 1391 |
| MATH Level 5 | 18.2% | 88.7% |
| Omni-MATH | — | 46.4% |
| FrontierMath (Feb 2025 set) | — | 3.8% |
| FrontierMath Tier 4 (v1) | — | 0% |

## Knowledge

- Claude 3 Sonnet: 21.1 (#276)
- Grok 3: 46.2 (#82)

| Benchmark | Claude 3 Sonnet | Grok 3 |
|---|---|---|
| GPQA Diamond | 40.6% | 75.8% |
| LMArena Expert | 1173 | 1421 |
| MMLU-Pro | — | 78.8% |
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 5.8% |
| GPQA (HELM) | — | 65% |
| MMLU | 75.9% | — |

## Multimodal

- Claude 3 Sonnet: 25.2 (#125)
- Grok 3: —

| Benchmark | Claude 3 Sonnet | Grok 3 |
|---|---|---|
| LMArena Vision | 984 | — |

## Multilingual

- Claude 3 Sonnet: 37.8 (#234)
- Grok 3: 52.3 (#87)

| Benchmark | Claude 3 Sonnet | Grok 3 |
|---|---|---|
| LMArena Non-English | 1205 | 1410 |
| LMArena Chinese | 1189 | 1448 |
| LMArena French | 1229 | 1460 |
| LMArena German | 1204 | 1431 |
| LMArena Japanese | 1131 | 1387 |
| LMArena Korean | 1128 | 1373 |
| LMArena Russian | 1227 | 1416 |
| LMArena Spanish | 1204 | 1417 |

## Instruction Following

- Claude 3 Sonnet: 62.8 (#235)
- Grok 3: 75.0 (#73)

| Benchmark | Claude 3 Sonnet | Grok 3 |
|---|---|---|
| LMArena Instruction Following | 1199 | 1409 |
| IFEval | — | 88.4% |

## Long Context

- Claude 3 Sonnet: 36.7 (#228)
- Grok 3: 38.7 (#192)

| Benchmark | Claude 3 Sonnet | Grok 3 |
|---|---|---|
| LMArena Longer Query | 1211 | 1439 |
| Fiction.LiveBench | — | 58.3% |

## Writing & Preference

- Claude 3 Sonnet: 42.1 (#238)
- Grok 3: 55.8 (#141)

| Benchmark | Claude 3 Sonnet | Grok 3 |
|---|---|---|
| LMArena Text | 1218 | 1426 |
| LMArena Creative Writing | 1186 | 1414 |
| LMArena Multi-Turn | 1227 | 1425 |
| Short-Story Creative Writing | — | 76.4% |
| EQ-Bench Creative Writing | — | 1186 |
| WildBench | — | 84.9% |

## FAQ

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

Grok 3 is the stronger model overall, scoring 39.9 to 29.0 on the Noometry Index.

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

Grok 3 scores higher on coding benchmarks: 41.9 versus 29.6 in the Noometry coding category.

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

22 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and Grok 3 has 40.