Model comparison
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.
Last verified . 29 shared benchmarks.
GoogleSummary
- 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.
Side by side
| Gemma 4 31B IT | Grok 4.3 | |
|---|---|---|
| Provider | xAI | |
| Noometry Index | 43.5 | 43.8 |
| Released | 2026-04-02 | 2026-04-17 |
| Weights | Open | Proprietary |
| Context window | 262K | 1M |
| Max output | 33K | 30K |
| Input $ / M tokens | $0.09 | $1.25 |
| Output $ / M tokens | $0.34 | $2.50 |
| Results tracked | 35 | 40 |
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Category by category
Coding Too close to call
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 Not comparable
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 Grok 4.3 leads
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 Grok 4.3 leads
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 Grok 4.3 leads
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 leads
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 leads
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 leads
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 leads
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 leads
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 | — |
Frequently asked questions
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.