Model comparison
Granite 4.0 Micro vs Grok 4 Fast
Grok 4 Fast is the stronger model overall, scoring 39.4 to 29.0 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in math, where Grok 4 Fast leads 38.9 to 12.0.
- Granite 4.0 Micro has downloadable open weights; the other is API-only.
Side by side
| Granite 4.0 Micro | Grok 4 Fast | |
|---|---|---|
| Provider | IBM | xAI |
| Noometry Index | 29.0 | 39.4 |
| Released | 2025-10-02 | 2025-09-19 |
| Weights | Open | Proprietary |
| Context window | 131K | — |
| Max output | 118K | — |
| Input $ / M tokens | $0.017 | — |
| Output $ / M tokens | $0.11 | — |
| Results tracked | 8 | 30 |
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Category by category
Coding Not comparable
Granite 4.0 Micro: —, Grok 4 Fast: 32.5 (#271)
| Benchmark | Granite 4.0 Micro | Grok 4 Fast |
|---|---|---|
| LMArena WebDev | — | 1159 |
| WeirdML | — | 42.9% |
| LMArena Coding | — | 1429 |
Agentic & Tool Use Not comparable
Granite 4.0 Micro: —, Grok 4 Fast: 29.5 (#86)
| Benchmark | Granite 4.0 Micro | Grok 4 Fast |
|---|---|---|
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |
Reasoning Grok 4 Fast leads
Granite 4.0 Micro: 19.2 (#265), Grok 4 Fast: 22.2 (#201)
| Benchmark | Granite 4.0 Micro | Grok 4 Fast |
|---|---|---|
| ARC-AGI-2 | — | 5.3% |
| Kagi LLM Benchmark | — | 66.1% |
| ARC-AGI-1 | — | 48.5% |
| Chess Puzzles | 0% | — |
| LMArena Hard Prompts | — | 1412 |
| DTBench | — | 82.7% |
| Epoch Capabilities Index | — | 144.2 |
| ForecastBench | — | 60.5 |
Math Grok 4 Fast leads
Granite 4.0 Micro: 12.0 (#307), Grok 4 Fast: 38.9 (#123)
| Benchmark | Granite 4.0 Micro | Grok 4 Fast |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.8% | — |
| Omni-MATH | 20.9% | — |
| LMArena Math | — | 1419 |
Knowledge Grok 4 Fast leads
Granite 4.0 Micro: 9.9 (#304), Grok 4 Fast: 32.0 (#214)
| Benchmark | Granite 4.0 Micro | Grok 4 Fast |
|---|---|---|
| GPQA Diamond | 28.3% | — |
| MMLU-Pro | 39.5% | — |
| Vectara Hallucination Rate | — | 19.7% |
| GPQA (HELM) | 30.7% | — |
| LMArena Expert | — | 1411 |
Multilingual Not comparable
Granite 4.0 Micro: —, Grok 4 Fast: 51.3 (#111)
| Benchmark | Granite 4.0 Micro | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | — | 1396 |
| LMArena Chinese | — | 1457 |
| LMArena French | — | 1431 |
| LMArena German | — | 1383 |
| LMArena Japanese | — | 1352 |
| LMArena Korean | — | 1357 |
| LMArena Russian | — | 1389 |
| LMArena Spanish | — | 1415 |
Instruction Following Grok 4 Fast leads
Granite 4.0 Micro: 69.9 (#169), Grok 4 Fast: 73.2 (#121)
| Benchmark | Granite 4.0 Micro | Grok 4 Fast |
|---|---|---|
| IFEval | 84.9% | — |
| LMArena Instruction Following | — | 1387 |
Long Context Not comparable
Granite 4.0 Micro: —, Grok 4 Fast: 63.2 (#3)
| Benchmark | Granite 4.0 Micro | Grok 4 Fast |
|---|---|---|
| Fiction.LiveBench | — | 94.4% |
| LMArena Longer Query | — | 1415 |
Writing & Preference Grok 4 Fast leads
Granite 4.0 Micro: 46.7 (#216), Grok 4 Fast: 60.0 (#102)
| Benchmark | Granite 4.0 Micro | Grok 4 Fast |
|---|---|---|
| LMArena Text | — | 1407 |
| LMArena Creative Writing | — | 1387 |
| WildBench | 67% | — |
| LMArena Multi-Turn | — | 1414 |
Frequently asked questions
Is Granite 4.0 Micro better than Grok 4 Fast?
Grok 4 Fast is the stronger model overall, scoring 39.4 to 29.0 on the Noometry Index.
How many benchmarks do Granite 4.0 Micro and Grok 4 Fast share?
0 benchmarks have published results for both models. Granite 4.0 Micro has 8 scored results on Noometry and Grok 4 Fast has 30.