# Grok 4 Fast vs Nova 2 Lite

> Grok 4 Fast and Nova 2 Lite score almost the same on the Noometry Index (39.4 vs 39.7), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/grok-4-fast-vs-nova-2-lite
- Last updated: 2026-10-11
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Grok 4 Fast scores higher in 6 categories and Nova 2 Lite in 3 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 40.6.
- The biggest single-benchmark swing is Vectara Hallucination Rate: 19.7% for Grok 4 Fast and 5.1% for Nova 2 Lite.

## Snapshot

| | Grok 4 Fast | Nova 2 Lite |
|---|---|---|
| Provider | xAI | Amazon |
| Noometry Index | 39.4 | 39.7 |
| Rank | 167 | 161 |
| Context | — | 1M |
| Input $/M | — | $0.30 |
| Output $/M | — | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4 Fast: 32.5 (#271)
- Nova 2 Lite: 40.7 (#134)

| Benchmark | Grok 4 Fast | Nova 2 Lite |
|---|---|---|
| LMArena Coding | 1429 | 1385 |
| LMArena WebDev | 1159 | — |
| WeirdML | 42.9% | — |

## Agentic & Tool Use

- Grok 4 Fast: 29.5 (#86)
- Nova 2 Lite: 24.1 (#121)

| Benchmark | Grok 4 Fast | Nova 2 Lite |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 27.1% |
| τ²-bench Banking | 15.7% | — |
| Cybench | 30% | — |
| LMArena Search | 1171 | — |

## Reasoning

- Grok 4 Fast: 22.2 (#201)
- Nova 2 Lite: 27.5 (#118)

| Benchmark | Grok 4 Fast | Nova 2 Lite |
|---|---|---|
| LMArena Hard Prompts | 1412 | 1364 |
| ARC-AGI-2 | 5.3% | — |
| Kagi LLM Benchmark | 66.1% | — |
| ARC-AGI-1 | 48.5% | — |
| DTBench | 82.7% | — |
| Epoch Capabilities Index | 144.2 | — |
| ForecastBench | 60.5 | — |

## Math

- Grok 4 Fast: 38.9 (#123)
- Nova 2 Lite: 37.5 (#156)

| Benchmark | Grok 4 Fast | Nova 2 Lite |
|---|---|---|
| LMArena Math | 1419 | 1359 |

## Knowledge

- Grok 4 Fast: 32.0 (#214)
- Nova 2 Lite: 43.0 (#94)

| Benchmark | Grok 4 Fast | Nova 2 Lite |
|---|---|---|
| Vectara Hallucination Rate | 19.7% | 5.1% |
| LMArena Expert | 1411 | 1358 |

## Multilingual

- Grok 4 Fast: 51.3 (#111)
- Nova 2 Lite: 47.1 (#153)

| Benchmark | Grok 4 Fast | Nova 2 Lite |
|---|---|---|
| LMArena Non-English | 1396 | 1337 |
| LMArena Chinese | 1457 | 1364 |
| LMArena French | 1431 | 1381 |
| LMArena German | 1383 | 1343 |
| LMArena Japanese | 1352 | 1271 |
| LMArena Korean | 1357 | 1284 |
| LMArena Russian | 1389 | 1343 |
| LMArena Spanish | 1415 | 1373 |

## Instruction Following

- Grok 4 Fast: 73.2 (#121)
- Nova 2 Lite: 70.5 (#161)

| Benchmark | Grok 4 Fast | Nova 2 Lite |
|---|---|---|
| LMArena Instruction Following | 1387 | 1335 |

## Long Context

- Grok 4 Fast: 63.2 (#3)
- Nova 2 Lite: 40.6 (#150)

| Benchmark | Grok 4 Fast | Nova 2 Lite |
|---|---|---|
| LMArena Longer Query | 1415 | 1335 |
| Fiction.LiveBench | 94.4% | — |

## Writing & Preference

- Grok 4 Fast: 60.0 (#102)
- Nova 2 Lite: 53.9 (#154)

| Benchmark | Grok 4 Fast | Nova 2 Lite |
|---|---|---|
| LMArena Text | 1407 | 1362 |
| LMArena Creative Writing | 1387 | 1291 |
| LMArena Multi-Turn | 1414 | 1338 |

## FAQ

### Is Grok 4 Fast better than Nova 2 Lite?

Grok 4 Fast and Nova 2 Lite score almost the same on the Noometry Index (39.4 vs 39.7), so choose on price, context window or the category you care about most.

### Is Grok 4 Fast or Nova 2 Lite better for coding?

Nova 2 Lite scores higher on coding benchmarks: 40.7 versus 32.5 in the Noometry coding category.

### How many benchmarks do Grok 4 Fast and Nova 2 Lite share?

18 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Nova 2 Lite has 19.