# Gemma 4 31B IT vs Grok 4.3

> Gemma 4 31B IT and Grok 4.3 score almost the same on the Noometry Index (43.5 vs 43.8), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gemma-4-31b-it-vs-grok-4-3
- Last updated: 2026-10-10
- Shared benchmarks: 29

## Summary

- They share 29 benchmarks with published results for both. Gemma 4 31B IT scores higher in 6 categories and Grok 4.3 in 3 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 37.9.
- The biggest single-benchmark swing is SimpleQA Verified: 10.4% for Gemma 4 31B IT and 33.2% for Grok 4.3.
- Gemma 4 31B IT is cheaper at $0.09 / $0.34 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
- Grok 4.3 accepts more context: 1M tokens versus 262K.
- Gemma 4 31B IT has downloadable open weights; the other is API-only.

## Snapshot

| | Gemma 4 31B IT | Grok 4.3 |
|---|---|---|
| Provider | Google | xAI |
| Noometry Index | 43.5 | 43.8 |
| Rank | 90 | 86 |
| Context | 262K | 1M |
| Input $/M | $0.09 | $1.25 |
| Output $/M | $0.34 | $2.50 |
| Weights | Open | Proprietary |

## Coding

- Gemma 4 31B IT: 42.3 (#108)
- Grok 4.3: 41.6 (#121)

| Benchmark | Gemma 4 31B IT | Grok 4.3 |
|---|---|---|
| LMArena WebDev | 1366 | 1357 |
| SciCode | 43.4% | 47.3% |
| WeirdML | 52.3% | 49.9% |
| LMArena Coding | 1459 | 1415 |
| ALE-Bench | 925.5 | 944.17 |

## Agentic & Tool Use

- Gemma 4 31B IT: —
- Grok 4.3: 27.7 (#99)

| Benchmark | Gemma 4 31B IT | Grok 4.3 |
|---|---|---|
| GDP.pdf | — | 8% |
| LMArena Search | — | 1165 |
| Vending-Bench 2 | — | 35.26 |

## Reasoning

- Gemma 4 31B IT: 27.2 (#122)
- Grok 4.3: 35.9 (#68)

| Benchmark | Gemma 4 31B IT | Grok 4.3 |
|---|---|---|
| NYT Connections (extended) | 70.6% | 55.2% |
| CritPt | 1.4% | 8% |
| Chess Puzzles | 5% | 25% |
| LMArena Hard Prompts | 1448 | 1396 |
| DTBench | 82.7% | 90.7% |
| LMCA | 39.3% | 38.3% |
| Epoch Capabilities Index | 142.74 | 149.16 |
| Kagi LLM Benchmark | 63.5% | — |
| Thematic Generalization | 53% | — |
| Surface Evolver Bench | 30.6% | — |
| ForecastBench | — | 60.3 |

## Math

- Gemma 4 31B IT: 43.2 (#81)
- Grok 4.3: 46.0 (#74)

| Benchmark | Gemma 4 31B IT | Grok 4.3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 73.3% | 93.3% |
| LMArena Math | 1465 | 1388 |
| FrontierMath (Tiers 1-3) | — | 42.8% |
| FrontierMath Tier 4 | — | 14.6% |
| ProofBench | — | 11% |

## Knowledge

- Gemma 4 31B IT: 37.9 (#151)
- Grok 4.3: 52.5 (#62)

| Benchmark | Gemma 4 31B IT | Grok 4.3 |
|---|---|---|
| GPQA Diamond | 75.8% | 88.8% |
| SimpleQA Verified | 10.4% | 33.2% |
| LMArena Expert | 1465 | 1385 |
| Vectara Hallucination Rate | 7.4% | — |

## Multimodal

- Gemma 4 31B IT: 41.6 (#34)
- Grok 4.3: 31.6 (#104)

| Benchmark | Gemma 4 31B IT | Grok 4.3 |
|---|---|---|
| LMArena Vision | 1277 | 1229 |
| Blueprint-Bench 2 | — | 0% |
| LMArena Document | 1425 | — |

## Multilingual

- Gemma 4 31B IT: 53.8 (#57)
- Grok 4.3: 50.5 (#120)

| Benchmark | Gemma 4 31B IT | Grok 4.3 |
|---|---|---|
| LMArena Non-English | 1431 | 1385 |
| LMArena Chinese | 1476 | 1422 |
| LMArena French | 1435 | 1412 |
| LMArena Russian | 1460 | 1399 |
| LMArena Spanish | 1444 | 1398 |
| LMArena German | — | 1395 |
| LMArena Japanese | — | 1379 |
| LMArena Korean | — | 1356 |

## Instruction Following

- Gemma 4 31B IT: 75.5 (#61)
- Grok 4.3: 72.1 (#140)

| Benchmark | Gemma 4 31B IT | Grok 4.3 |
|---|---|---|
| LMArena Instruction Following | 1433 | 1366 |

## Long Context

- Gemma 4 31B IT: 44.2 (#71)
- Grok 4.3: 42.5 (#123)

| Benchmark | Gemma 4 31B IT | Grok 4.3 |
|---|---|---|
| LMArena Longer Query | 1446 | 1393 |

## Writing & Preference

- Gemma 4 31B IT: 60.5 (#96)
- Grok 4.3: 58.5 (#118)

| Benchmark | Gemma 4 31B IT | Grok 4.3 |
|---|---|---|
| LMArena Text | 1443 | 1397 |
| LMArena Creative Writing | 1415 | 1380 |
| EQ-Bench 4 | 1120 | 1075 |
| LMArena Multi-Turn | 1452 | 1406 |
| EQ-Bench Creative Writing | 1368 | — |

## FAQ

### Is Gemma 4 31B IT better than Grok 4.3?

Gemma 4 31B IT and Grok 4.3 score almost the same on the Noometry Index (43.5 vs 43.8), so choose on price, context window or the category you care about most.

### Which is cheaper, Gemma 4 31B IT or Grok 4.3?

Gemma 4 31B IT is cheaper. It lists at $0.09 per million input tokens and $0.34 per million output tokens; Grok 4.3 lists at $1.25 and $2.50.

### Is Gemma 4 31B IT or Grok 4.3 better for coding?

They score almost the same on coding (42.3 vs 41.6); test both on your own repository before choosing.

### Which has the bigger context window?

Grok 4.3 does, with 1M tokens against 262K.

### How many benchmarks do Gemma 4 31B IT and Grok 4.3 share?

29 benchmarks have published results for both models. Gemma 4 31B IT has 35 scored results on Noometry and Grok 4.3 has 40.