# Claude Opus 4.7 vs Grok 4 Fast

> Claude Opus 4.7 is the stronger model overall, scoring 58.4 to 39.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-7-vs-grok-4-fast
- Last updated: 2026-10-10
- Shared benchmarks: 28

## Summary

- They share 28 benchmarks with published results for both. Claude Opus 4.7 scores higher in 8 categories and Grok 4 Fast in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Opus 4.7 leads 53.7 to 22.5.
- The biggest single-benchmark swing is ARC-AGI-2: 75.8% for Claude Opus 4.7 and 5.3% for Grok 4 Fast.

## Snapshot

| | Claude Opus 4.7 | Grok 4 Fast |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 58.4 | 39.0 |
| Rank | 17 | 164 |
| Context | 1M | — |
| Input $/M | $5 | — |
| Output $/M | $25 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Opus 4.7: 59.9 (#10)
- Grok 4 Fast: 32.3 (#264)

| Benchmark | Claude Opus 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena WebDev | 1557 | 1160 |
| WeirdML | 76.4% | 42.9% |
| LMArena Coding | 1519 | 1429 |
| SWE-bench Verified | 83.5% | — |
| FrontierCode | 38.5% | — |
| SciCode | 54.5% | — |
| GSO | 44.1% | — |
| MirrorCode | 31.1% | — |
| ALE-Bench | 1,323 | — |

## Agentic & Tool Use

- Claude Opus 4.7: 47.9 (#8)
- Grok 4 Fast: 29.3 (#80)

| Benchmark | Claude Opus 4.7 | Grok 4 Fast |
|---|---|---|
| τ²-bench Banking | 40.2% | 15.7% |
| LMArena Search | 1233 | 1171 |
| Terminal-Bench | 80.2% | — |
| APEX-Agents | 49.2% | — |
| OSWorld 2.0 | 18.2% | — |
| Cybench | — | 30% |
| PostTrainBench | 28.6% | — |
| ExploitBench | 26.5% | — |
| GBAEval | 43.8% | — |
| GDP.pdf | 21% | — |
| Vending-Bench 2 | 10,937 | — |

## Reasoning

- Claude Opus 4.7: 53.7 (#24)
- Grok 4 Fast: 22.5 (#179)

| Benchmark | Claude Opus 4.7 | Grok 4 Fast |
|---|---|---|
| ARC-AGI-2 | 75.8% | 5.3% |
| Kagi LLM Benchmark | 80.7% | 66.1% |
| ARC-AGI-1 | 93.5% | 48.5% |
| LMArena Hard Prompts | 1507 | 1413 |
| DTBench | 94.7% | 82.7% |
| Epoch Capabilities Index | 156.39 | 144.21 |
| ForecastBench | 60.3 | 60.5 |
| SimpleBench | 61.7% | — |
| NYT Connections (extended) | 39% | — |
| CritPt | 12% | — |
| Chess Puzzles | 30% | — |
| Thematic Generalization | 72.8% | — |
| EBR-Bench | 19% | — |
| Mystery Game Puzzles | 28% | — |
| LMCA | 52.2% | — |

## Math

- Claude Opus 4.7: 66.5 (#20)
- Grok 4 Fast: 36.1 (#126)

| Benchmark | Claude Opus 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1499 | 1419 |
| FrontierMath (Tiers 1-3) | 70.2% | — |
| FrontierMath Tier 4 | 31.7% | — |
| MathArena Final-Answer Competitions | 73.6% | — |
| OTIS Mock AIME 2024-2025 | 97.8% | — |
| ProofBench | 54% | — |
| FrontierMath (Feb 2025 set) | 43.8% | — |
| FrontierMath Tier 4 (v1) | 22.9% | — |

## Knowledge

- Claude Opus 4.7: 62.6 (#20)
- Grok 4 Fast: 31.5 (#211)

| Benchmark | Claude Opus 4.7 | Grok 4 Fast |
|---|---|---|
| Vectara Hallucination Rate | 12% | 19.7% |
| LMArena Expert | 1521 | 1411 |
| GPQA Diamond | 90.2% | — |
| Humanity's Last Exam | 36.2% | — |
| SimpleQA Verified | 51.7% | — |

## Multimodal

- Claude Opus 4.7: 41.5 (#29)
- Grok 4 Fast: —

| Benchmark | Claude Opus 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Vision | 1317 | — |
| Blueprint-Bench 2 | 24.5% | — |
| Furniture Assembly | 33.3% | — |
| LMArena Document | 1495 | — |

## Multilingual

- Claude Opus 4.7: 57.5 (#9)
- Grok 4 Fast: 51.5 (#106)

| Benchmark | Claude Opus 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1481 | 1397 |
| LMArena Chinese | 1530 | 1458 |
| LMArena French | 1505 | 1433 |
| LMArena German | 1494 | 1383 |
| LMArena Japanese | 1472 | 1358 |
| LMArena Korean | 1466 | 1359 |
| LMArena Russian | 1494 | 1387 |
| LMArena Spanish | 1497 | 1414 |

## Instruction Following

- Claude Opus 4.7: 78.6 (#9)
- Grok 4 Fast: 73.4 (#116)

| Benchmark | Claude Opus 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1498 | 1388 |

## Long Context

- Claude Opus 4.7: 46.1 (#24)
- Grok 4 Fast: 63.2 (#3)

| Benchmark | Claude Opus 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1505 | 1415 |
| Fiction.LiveBench | — | 94.4% |

## Writing & Preference

- Claude Opus 4.7: 75.3 (#8)
- Grok 4 Fast: 60.2 (#96)

| Benchmark | Claude Opus 4.7 | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1491 | 1407 |
| LMArena Creative Writing | 1486 | 1388 |
| LMArena Multi-Turn | 1506 | 1414 |
| EQ-Bench Creative Writing | 1914 | — |
| EQ-Bench 4 | 1311 | — |

## FAQ

### Is Claude Opus 4.7 better than Grok 4 Fast?

Claude Opus 4.7 is the stronger model overall, scoring 58.4 to 39.0 on the Noometry Index.

### Is Claude Opus 4.7 or Grok 4 Fast better for coding?

Claude Opus 4.7 scores higher on coding benchmarks: 59.9 versus 32.3 in the Noometry coding category.

### How many benchmarks do Claude Opus 4.7 and Grok 4 Fast share?

28 benchmarks have published results for both models. Claude Opus 4.7 has 66 scored results on Noometry and Grok 4 Fast has 30.