# DeepSeek V4 Pro vs Grok 4 Fast

> DeepSeek V4 Pro is the stronger model overall, scoring 54.2 to 39.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/deepseek-v4-pro-vs-grok-4-fast
- Last updated: 2026-10-10
- Shared benchmarks: 26

## Summary

- They share 26 benchmarks with published results for both. DeepSeek V4 Pro 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 DeepSeek V4 Pro leads 56.4 to 22.5.
- The biggest single-benchmark swing is ARC-AGI-2: 61.3% for DeepSeek V4 Pro and 5.3% for Grok 4 Fast.
- DeepSeek V4 Pro has downloadable open weights; the other is API-only.

## Snapshot

| | DeepSeek V4 Pro | Grok 4 Fast |
|---|---|---|
| Provider | DeepSeek | xAI |
| Noometry Index | 54.2 | 39.0 |
| Rank | 28 | 164 |
| Context | 1M | — |
| Input $/M | $0.43 | — |
| Output $/M | $0.87 | — |
| Weights | Open | Proprietary |

## Coding

- DeepSeek V4 Pro: 52.2 (#31)
- Grok 4 Fast: 32.3 (#264)

| Benchmark | DeepSeek V4 Pro | Grok 4 Fast |
|---|---|---|
| LMArena WebDev | 1582 | 1160 |
| WeirdML | 66.2% | 42.9% |
| LMArena Coding | 1470 | 1429 |
| SWE-bench Verified | 77.6% | — |
| FrontierCode | 28.6% | — |
| SciCode | 51% | — |
| ALE-Bench | 1,403 | — |

## Agentic & Tool Use

- DeepSeek V4 Pro: 32.7 (#54)
- Grok 4 Fast: 29.3 (#80)

| Benchmark | DeepSeek V4 Pro | Grok 4 Fast |
|---|---|---|
| APEX-Agents | 47.3% | — |
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |
| Vending-Bench 2 | 3,285 | — |

## Reasoning

- DeepSeek V4 Pro: 56.4 (#22)
- Grok 4 Fast: 22.5 (#179)

| Benchmark | DeepSeek V4 Pro | Grok 4 Fast |
|---|---|---|
| ARC-AGI-2 | 61.3% | 5.3% |
| Kagi LLM Benchmark | 53.5% | 66.1% |
| ARC-AGI-1 | 90.5% | 48.5% |
| LMArena Hard Prompts | 1461 | 1413 |
| DTBench | 93.9% | 82.7% |
| Epoch Capabilities Index | 155.39 | 144.21 |
| ForecastBench | 56.1 | 60.5 |
| NYT Connections (extended) | 91.3% | — |
| CritPt | 18% | — |
| Chess Puzzles | 47% | — |
| Mystery Game Puzzles | 43% | — |
| LMCA | 45.5% | — |
| Surface Evolver Bench | 40% | — |

## Math

- DeepSeek V4 Pro: 64.6 (#24)
- Grok 4 Fast: 36.1 (#126)

| Benchmark | DeepSeek V4 Pro | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1455 | 1419 |
| FrontierMath (Tiers 1-3) | 64.6% | — |
| FrontierMath Tier 4 | 26.8% | — |
| MathArena Final-Answer Competitions | 76.6% | — |
| OTIS Mock AIME 2024-2025 | 98.6% | — |
| ProofBench | 50% | — |

## Knowledge

- DeepSeek V4 Pro: 59.5 (#28)
- Grok 4 Fast: 31.5 (#211)

| Benchmark | DeepSeek V4 Pro | Grok 4 Fast |
|---|---|---|
| Vectara Hallucination Rate | 8.6% | 19.7% |
| LMArena Expert | 1463 | 1411 |
| GPQA Diamond | 91.7% | — |
| SimpleQA Verified | 52.9% | — |

## Multilingual

- DeepSeek V4 Pro: 54.5 (#44)
- Grok 4 Fast: 51.5 (#106)

| Benchmark | DeepSeek V4 Pro | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1438 | 1397 |
| LMArena Chinese | 1486 | 1458 |
| LMArena French | 1473 | 1433 |
| LMArena German | 1458 | 1383 |
| LMArena Japanese | 1448 | 1358 |
| LMArena Korean | 1452 | 1359 |
| LMArena Russian | 1452 | 1387 |
| LMArena Spanish | 1457 | 1414 |

## Instruction Following

- DeepSeek V4 Pro: 76.3 (#44)
- Grok 4 Fast: 73.4 (#116)

| Benchmark | DeepSeek V4 Pro | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1448 | 1388 |

## Long Context

- DeepSeek V4 Pro: 45.0 (#49)
- Grok 4 Fast: 63.2 (#3)

| Benchmark | DeepSeek V4 Pro | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1459 | 1415 |
| Fiction.LiveBench | — | 94.4% |
| CL-bench Life | 13.5% | — |

## Writing & Preference

- DeepSeek V4 Pro: 65.6 (#45)
- Grok 4 Fast: 60.2 (#96)

| Benchmark | DeepSeek V4 Pro | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1451 | 1407 |
| LMArena Creative Writing | 1446 | 1388 |
| LMArena Multi-Turn | 1467 | 1414 |
| EQ-Bench Creative Writing | 1553 | — |
| EQ-Bench 4 | 1166 | — |

## FAQ

### Is DeepSeek V4 Pro better than Grok 4 Fast?

DeepSeek V4 Pro is the stronger model overall, scoring 54.2 to 39.0 on the Noometry Index.

### Is DeepSeek V4 Pro or Grok 4 Fast better for coding?

DeepSeek V4 Pro scores higher on coding benchmarks: 52.2 versus 32.3 in the Noometry coding category.

### How many benchmarks do DeepSeek V4 Pro and Grok 4 Fast share?

26 benchmarks have published results for both models. DeepSeek V4 Pro has 48 scored results on Noometry and Grok 4 Fast has 30.