# GPT-4 vs Grok 4.20 (Non-Reasoning)

> Grok 4.20 (Non-Reasoning) is the stronger model overall, scoring 48.5 to 28.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-4-vs-grok-4-20
- Last updated: 2026-10-10
- Shared benchmarks: 26

## Summary

- They share 26 benchmarks with published results for both. GPT-4 scores higher in 0 categories and Grok 4.20 (Non-Reasoning) in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Grok 4.20 (Non-Reasoning) leads 48.0 to 10.1.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 1.1% for GPT-4 and 92.2% for Grok 4.20 (Non-Reasoning).
- Grok 4.20 (Non-Reasoning) is cheaper at $1.25 / $2.50 per million input/output tokens, against $30 / $60 for GPT-4.
- Grok 4.20 (Non-Reasoning) accepts more context: 1M tokens versus 8K.

## Snapshot

| | GPT-4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 28.9 | 48.5 |
| Rank | 308 | 48 |
| Context | 8K | 1M |
| Input $/M | $30 | $1.25 |
| Output $/M | $60 | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-4: 31.2 (#277)
- Grok 4.20 (Non-Reasoning): 41.8 (#104)

| Benchmark | GPT-4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| WeirdML | 12.4% | 52.3% |
| LMArena Coding | 1254 | 1458 |
| LMArena WebDev | — | 1374 |
| BigCodeBench Instruct | 46% | — |
| BigCodeBench Complete | 57.2% | — |
| ALE-Bench | — | 1,150 |
| HumanEval+ | 79.3% | — |

## Agentic & Tool Use

- GPT-4: —
- Grok 4.20 (Non-Reasoning): 34.3 (#43)

| Benchmark | GPT-4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| Terminal-Bench | — | 57.3% |
| τ²-bench Banking | — | 18% |
| LMArena Search | — | 1189 |
| METR Time Horizons | 36.1% | — |
| Vending-Bench 2 | — | 4,663 |

## Reasoning

- GPT-4: 17.3 (#285)
- Grok 4.20 (Non-Reasoning): 52.2 (#30)

| Benchmark | GPT-4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| Chess Puzzles | 4% | 24% |
| LMArena Hard Prompts | 1241 | 1451 |
| DTBench | 62.7% | 90.1% |
| LMCA | 17.1% | 38.7% |
| Epoch Capabilities Index | 125.88 | 152.01 |
| ForecastBench | 57.8 | 61.4 |
| ARC-AGI-2 | — | 65.1% |
| Kagi LLM Benchmark | — | 75% |
| NYT Connections (extended) | — | 85.4% |
| ARC-AGI-1 | — | 89.5% |
| Thematic Generalization | — | 63.8% |
| Mystery Game Puzzles | 12% | — |
| BIG-Bench Hard | 75.1% | — |
| HellaSwag | 95.3% | — |
| WinoGrande | 87.5% | — |

## Math

- GPT-4: 10.1 (#304)
- Grok 4.20 (Non-Reasoning): 48.0 (#54)

| Benchmark | GPT-4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.1% | 92.2% |
| LMArena Math | 1269 | 1455 |
| FrontierMath (Tiers 1-3) | — | 44.9% |
| FrontierMath Tier 4 | — | 17.1% |
| ProofBench | — | 14% |
| MATH Level 5 | 23% | — |
| GSM8K | 92% | — |

## Knowledge

- GPT-4: 18.4 (#277)
- Grok 4.20 (Non-Reasoning): 52.8 (#54)

| Benchmark | GPT-4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| GPQA Diamond | 35.7% | 89.3% |
| LMArena Expert | 1211 | 1440 |
| SimpleQA Verified | — | 30.2% |
| MMLU | 86.4% | — |
| TriviaQA | 84.8% | — |

## Multimodal

- GPT-4: —
- Grok 4.20 (Non-Reasoning): 33.2 (#88)

| Benchmark | GPT-4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Vision | — | 1263 |
| Blueprint-Bench 2 | — | 0% |
| LMArena Document | — | 1416 |

## Multilingual

- GPT-4: 40.8 (#210)
- Grok 4.20 (Non-Reasoning): 54.7 (#38)

| Benchmark | GPT-4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Non-English | 1246 | 1440 |
| LMArena Chinese | 1242 | 1481 |
| LMArena French | 1282 | 1477 |
| LMArena German | 1251 | 1463 |
| LMArena Japanese | 1209 | 1450 |
| LMArena Korean | 1184 | 1417 |
| LMArena Russian | 1251 | 1457 |
| LMArena Spanish | 1261 | 1442 |

## Instruction Following

- GPT-4: 65.5 (#217)
- Grok 4.20 (Non-Reasoning): 75.0 (#79)

| Benchmark | GPT-4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Instruction Following | 1241 | 1420 |

## Long Context

- GPT-4: 37.7 (#207)
- Grok 4.20 (Non-Reasoning): 45.4 (#33)

| Benchmark | GPT-4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Longer Query | 1244 | 1436 |
| CL-bench | — | 22.2% |
| CL-bench Life | — | 11.9% |

## Writing & Preference

- GPT-4: 35.0 (#263)
- Grok 4.20 (Non-Reasoning): 65.9 (#42)

| Benchmark | GPT-4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|
| LMArena Text | 1263 | 1451 |
| LMArena Creative Writing | 1244 | 1439 |
| EQ-Bench Creative Writing | 752 | 1574 |
| LMArena Multi-Turn | 1257 | 1456 |

## FAQ

### Is GPT-4 better than Grok 4.20 (Non-Reasoning)?

Grok 4.20 (Non-Reasoning) is the stronger model overall, scoring 48.5 to 28.9 on the Noometry Index.

### Which is cheaper, GPT-4 or Grok 4.20 (Non-Reasoning)?

Grok 4.20 (Non-Reasoning) is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; GPT-4 lists at $30 and $60.

### Is GPT-4 or Grok 4.20 (Non-Reasoning) better for coding?

Grok 4.20 (Non-Reasoning) scores higher on coding benchmarks: 41.8 versus 31.2 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.20 (Non-Reasoning) does, with 1M tokens against 8K.

### How many benchmarks do GPT-4 and Grok 4.20 (Non-Reasoning) share?

26 benchmarks have published results for both models. GPT-4 has 38 scored results on Noometry and Grok 4.20 (Non-Reasoning) has 46.