# DeepSeek-V3.1 vs Grok 4.3

> DeepSeek-V3.1 and Grok 4.3 score almost the same on the Noometry Index (42.8 vs 43.8), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/deepseek-v3-1-vs-grok-4-3
- Last updated: 2026-10-10
- Shared benchmarks: 22

## Summary

- They share 22 benchmarks with published results for both. DeepSeek-V3.1 scores higher in 3 categories and Grok 4.3 in 5 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 43.7.
- The biggest single-benchmark swing is LMCA: 24.3% for DeepSeek-V3.1 and 38.3% for Grok 4.3.
- DeepSeek-V3.1 is cheaper at $0.25 / $0.95 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
- Grok 4.3 accepts more context: 1M tokens versus 164K.
- DeepSeek-V3.1 has downloadable open weights; the other is API-only.

## Snapshot

| | DeepSeek-V3.1 | Grok 4.3 |
|---|---|---|
| Provider | DeepSeek | xAI |
| Noometry Index | 42.8 | 43.8 |
| Rank | 108 | 86 |
| Context | 164K | 1M |
| Input $/M | $0.25 | $1.25 |
| Output $/M | $0.95 | $2.50 |
| Weights | Open | Proprietary |

## Coding

- DeepSeek-V3.1: 40.3 (#144)
- Grok 4.3: 41.6 (#121)

| Benchmark | DeepSeek-V3.1 | Grok 4.3 |
|---|---|---|
| WeirdML | 38.4% | 49.9% |
| LMArena Coding | 1417 | 1415 |
| LMArena WebDev | — | 1357 |
| SciCode | — | 47.3% |
| ALE-Bench | — | 944.17 |

## Agentic & Tool Use

- DeepSeek-V3.1: —
- Grok 4.3: 27.7 (#99)

| Benchmark | DeepSeek-V3.1 | Grok 4.3 |
|---|---|---|
| GDP.pdf | — | 8% |
| LMArena Search | — | 1165 |
| Vending-Bench 2 | — | 35.26 |

## Reasoning

- DeepSeek-V3.1: 27.9 (#110)
- Grok 4.3: 35.9 (#68)

| Benchmark | DeepSeek-V3.1 | Grok 4.3 |
|---|---|---|
| LMArena Hard Prompts | 1417 | 1396 |
| DTBench | 82.7% | 90.7% |
| LMCA | 24.3% | 38.3% |
| Epoch Capabilities Index | 139.92 | 149.16 |
| ForecastBench | 58 | 60.3 |
| SimpleBench | 40% | — |
| Kagi LLM Benchmark | 53.2% | — |
| NYT Connections (extended) | — | 55.2% |
| CritPt | — | 8% |
| Chess Puzzles | — | 25% |

## Math

- DeepSeek-V3.1: 38.9 (#122)
- Grok 4.3: 46.0 (#74)

| Benchmark | DeepSeek-V3.1 | Grok 4.3 |
|---|---|---|
| LMArena Math | 1420 | 1388 |
| FrontierMath (Tiers 1-3) | — | 42.8% |
| FrontierMath Tier 4 | — | 14.6% |
| OTIS Mock AIME 2024-2025 | — | 93.3% |
| ProofBench | — | 11% |

## Knowledge

- DeepSeek-V3.1: 43.7 (#90)
- Grok 4.3: 52.5 (#62)

| Benchmark | DeepSeek-V3.1 | Grok 4.3 |
|---|---|---|
| LMArena Expert | 1405 | 1385 |
| GPQA Diamond | — | 88.8% |
| SimpleQA Verified | — | 33.2% |
| Vectara Hallucination Rate | 5.5% | — |

## Multimodal

- DeepSeek-V3.1: —
- Grok 4.3: 31.6 (#104)

| Benchmark | DeepSeek-V3.1 | Grok 4.3 |
|---|---|---|
| LMArena Vision | — | 1229 |
| Blueprint-Bench 2 | — | 0% |

## Multilingual

- DeepSeek-V3.1: 51.6 (#106)
- Grok 4.3: 50.5 (#120)

| Benchmark | DeepSeek-V3.1 | Grok 4.3 |
|---|---|---|
| LMArena Non-English | 1400 | 1385 |
| LMArena Chinese | 1469 | 1422 |
| LMArena French | 1447 | 1412 |
| LMArena German | 1411 | 1395 |
| LMArena Japanese | 1378 | 1379 |
| LMArena Korean | 1337 | 1356 |
| LMArena Russian | 1405 | 1399 |
| LMArena Spanish | 1431 | 1398 |

## Instruction Following

- DeepSeek-V3.1: 73.9 (#110)
- Grok 4.3: 72.1 (#140)

| Benchmark | DeepSeek-V3.1 | Grok 4.3 |
|---|---|---|
| LMArena Instruction Following | 1400 | 1366 |

## Long Context

- DeepSeek-V3.1: 36.3 (#232)
- Grok 4.3: 42.5 (#123)

| Benchmark | DeepSeek-V3.1 | Grok 4.3 |
|---|---|---|
| LMArena Longer Query | 1422 | 1393 |
| Fiction.LiveBench | 52.8% | — |

## Writing & Preference

- DeepSeek-V3.1: 60.3 (#98)
- Grok 4.3: 58.5 (#118)

| Benchmark | DeepSeek-V3.1 | Grok 4.3 |
|---|---|---|
| LMArena Text | 1420 | 1397 |
| LMArena Creative Writing | 1401 | 1380 |
| LMArena Multi-Turn | 1408 | 1406 |
| EQ-Bench Creative Writing | 1436 | — |
| EQ-Bench 4 | — | 1075 |

## FAQ

### Is DeepSeek-V3.1 better than Grok 4.3?

DeepSeek-V3.1 and Grok 4.3 score almost the same on the Noometry Index (42.8 vs 43.8), so choose on price, context window or the category you care about most.

### Which is cheaper, DeepSeek-V3.1 or Grok 4.3?

DeepSeek-V3.1 is cheaper. It lists at $0.25 per million input tokens and $0.95 per million output tokens; Grok 4.3 lists at $1.25 and $2.50.

### Is DeepSeek-V3.1 or Grok 4.3 better for coding?

Grok 4.3 scores higher on coding benchmarks: 41.6 versus 40.3 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.3 does, with 1M tokens against 164K.

### How many benchmarks do DeepSeek-V3.1 and Grok 4.3 share?

22 benchmarks have published results for both models. DeepSeek-V3.1 has 27 scored results on Noometry and Grok 4.3 has 40.