# Claude Opus 4 vs Grok-3 mini

> Claude Opus 4 is the stronger model overall, scoring 43.1 to 41.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-vs-grok-3-mini
- Last updated: 2026-10-10
- Shared benchmarks: 35

## Summary

- They share 35 benchmarks with published results for both. Claude Opus 4 scores higher in 4 categories and Grok-3 mini in 4 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Opus 4 leads 27.3 to 13.6.
- The biggest single-benchmark swing is Omni-MATH: 61.6% for Claude Opus 4 and 31.8% for Grok-3 mini.

## Snapshot

| | Claude Opus 4 | Grok-3 mini |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 43.1 | 41.2 |
| Rank | 100 | 141 |
| Context | 200K | — |
| Input $/M | $15 | — |
| Output $/M | $75 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4: 47.2 (#62)
- Grok-3 mini: 40.8 (#131)

| Benchmark | Claude Opus 4 | Grok-3 mini |
|---|---|---|
| Aider Polyglot | 72% | 49.3% |
| WeirdML | 43.7% | 42.6% |
| LMArena Coding | 1442 | 1379 |
| SWE-bench Verified | 70.7% | — |
| SWE-bench Verified (bash only) | 67.6% | — |
| GSO | 6.9% | — |
| AlgoTune | 1.33 | — |

## Agentic & Tool Use

- Claude Opus 4: 34.8 (#42)
- Grok-3 mini: —

| Benchmark | Claude Opus 4 | Grok-3 mini |
|---|---|---|
| Cybench | 38% | — |
| DeepResearch Bench | 46.8% | — |
| LMArena Search | 1127 | — |
| METR Time Horizons | 63.9% | — |

## Reasoning

- Claude Opus 4: 27.3 (#121)
- Grok-3 mini: 13.6 (#334)

| Benchmark | Claude Opus 4 | Grok-3 mini |
|---|---|---|
| ARC-AGI-2 | 8.6% | 0.4% |
| Kagi LLM Benchmark | 74.3% | 61.3% |
| ARC-AGI-1 | 35.7% | 16.5% |
| LMArena Hard Prompts | 1399 | 1375 |
| Epoch Capabilities Index | 142.67 | 140.35 |
| SimpleBench | 58.8% | — |
| CritPt | 0.3% | — |
| EnigmaEval | 5.6% | — |
| DTBench | 81.6% | — |
| LMCA | 37.4% | — |
| ForecastBench | 61.1 | — |

## Math

- Claude Opus 4: 42.0 (#86)
- Grok-3 mini: 42.1 (#85)

| Benchmark | Claude Opus 4 | Grok-3 mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 64.4% | 77.8% |
| Omni-MATH | 61.6% | 31.8% |
| LMArena Math | 1390 | 1386 |
| MATH Level 5 | 85% | 90.9% |
| FrontierMath (Feb 2025 set) | 4.5% | 5.9% |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Claude Opus 4: 44.0 (#88)
- Grok-3 mini: 46.4 (#81)

| Benchmark | Claude Opus 4 | Grok-3 mini |
|---|---|---|
| GPQA Diamond | 76.3% | 76.3% |
| MMLU-Pro | 87.5% | 79.9% |
| Confabulations | 15.9% | 10.8% |
| GPQA (HELM) | 70.8% | 67.5% |
| LMArena Expert | 1386 | 1395 |
| Humanity's Last Exam | 10.7% | — |
| Vectara Hallucination Rate | 12% | — |

## Multimodal

- Claude Opus 4: 31.5 (#106)
- Grok-3 mini: —

| Benchmark | Claude Opus 4 | Grok-3 mini |
|---|---|---|
| LMArena Vision | 1192 | — |
| GeoBench | 49% | — |
| VPCT | 38% | — |

## Multilingual

- Claude Opus 4: 48.8 (#138)
- Grok-3 mini: 48.1 (#145)

| Benchmark | Claude Opus 4 | Grok-3 mini |
|---|---|---|
| LMArena Non-English | 1362 | 1352 |
| LMArena Chinese | 1386 | 1387 |
| LMArena French | 1372 | 1357 |
| LMArena German | 1391 | 1349 |
| LMArena Japanese | 1331 | 1342 |
| LMArena Korean | 1321 | 1335 |
| LMArena Russian | 1392 | 1353 |
| LMArena Spanish | 1389 | 1381 |

## Instruction Following

- Claude Opus 4: 77.1 (#28)
- Grok-3 mini: 78.5 (#9)

| Benchmark | Claude Opus 4 | Grok-3 mini |
|---|---|---|
| IFEval | 91.8% | 95.1% |
| LMArena Instruction Following | 1406 | 1357 |

## Long Context

- Claude Opus 4: 39.6 (#172)
- Grok-3 mini: 41.0 (#147)

| Benchmark | Claude Opus 4 | Grok-3 mini |
|---|---|---|
| Fiction.LiveBench | 61.1% | 66.7% |
| LMArena Longer Query | 1422 | 1372 |

## Writing & Preference

- Claude Opus 4: 61.2 (#89)
- Grok-3 mini: 52.5 (#169)

| Benchmark | Claude Opus 4 | Grok-3 mini |
|---|---|---|
| LMArena Text | 1377 | 1370 |
| LMArena Creative Writing | 1387 | 1342 |
| Short-Story Creative Writing | 83.6% | 73.5% |
| WildBench | 85.2% | 65.1% |
| LMArena Multi-Turn | 1396 | 1355 |
| EQ-Bench Creative Writing | 1580 | — |

## FAQ

### Is Claude Opus 4 better than Grok-3 mini?

Claude Opus 4 is the stronger model overall, scoring 43.1 to 41.2 on the Noometry Index.

### Is Claude Opus 4 or Grok-3 mini better for coding?

Claude Opus 4 scores higher on coding benchmarks: 47.2 versus 40.8 in the Noometry coding category.

### How many benchmarks do Claude Opus 4 and Grok-3 mini share?

35 benchmarks have published results for both models. Claude Opus 4 has 56 scored results on Noometry and Grok-3 mini has 35.