# Granite 4.2 8B vs Grok-3 mini

> Granite 4.2 8B and Grok-3 mini score almost the same on the Noometry Index (40.0 vs 41.0), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/granite-4-2-8b-vs-grok-3-mini
- Last updated: 2026-10-10
- Shared benchmarks: 11

## Summary

- They share 11 benchmarks with published results for both. Granite 4.2 8B scores higher in 1 category and Grok-3 mini in 6 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Granite 4.2 8B leads 25.5 to 13.8.
- Granite 4.2 8B has downloadable open weights; the other is API-only.

## Snapshot

| | Granite 4.2 8B | Grok-3 mini |
|---|---|---|
| Provider | IBM | xAI |
| Noometry Index | 40.0 | 41.0 |
| Rank | 143 | 130 |
| Context | 131K | — |
| Input $/M | $0.06 | — |
| Output $/M | $0.25 | — |
| Weights | Open | Proprietary |

## Coding

- Granite 4.2 8B: 39.9 (#138)
- Grok-3 mini: 40.4 (#126)

| Benchmark | Granite 4.2 8B | Grok-3 mini |
|---|---|---|
| LMArena Coding | 1379 | 1380 |
| Aider Polyglot | — | 49.3% |
| WeirdML | — | 42.6% |

## Reasoning

- Granite 4.2 8B: 25.5 (#130)
- Grok-3 mini: 13.8 (#323)

| Benchmark | Granite 4.2 8B | Grok-3 mini |
|---|---|---|
| LMArena Hard Prompts | 1327 | 1374 |
| ARC-AGI-2 | — | 0.4% |
| Kagi LLM Benchmark | — | 61.3% |
| ARC-AGI-1 | — | 16.5% |
| Epoch Capabilities Index | — | 140.35 |

## Math

- Granite 4.2 8B: —
- Grok-3 mini: 40.3 (#78)

| Benchmark | Granite 4.2 8B | Grok-3 mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 77.8% |
| Omni-MATH | — | 31.8% |
| LMArena Math | — | 1386 |
| MATH Level 5 | — | 90.9% |
| FrontierMath (Feb 2025 set) | — | 5.9% |

## Knowledge

- Granite 4.2 8B: 37.7 (#144)
- Grok-3 mini: 46.3 (#75)

| Benchmark | Granite 4.2 8B | Grok-3 mini |
|---|---|---|
| LMArena Expert | 1380 | 1395 |
| GPQA Diamond | — | 76.3% |
| MMLU-Pro | — | 79.9% |
| Confabulations | — | 10.8% |
| GPQA (HELM) | — | 67.5% |

## Multilingual

- Granite 4.2 8B: 44.5 (#173)
- Grok-3 mini: 48.3 (#141)

| Benchmark | Granite 4.2 8B | Grok-3 mini |
|---|---|---|
| LMArena Non-English | 1299 | 1352 |
| LMArena Chinese | 1361 | 1387 |
| LMArena Russian | 1283 | 1352 |
| LMArena French | — | 1357 |
| LMArena German | — | 1350 |
| LMArena Japanese | — | 1343 |
| LMArena Korean | — | 1336 |
| LMArena Spanish | — | 1379 |

## Instruction Following

- Granite 4.2 8B: 68.7 (#183)
- Grok-3 mini: 78.7 (#8)

| Benchmark | Granite 4.2 8B | Grok-3 mini |
|---|---|---|
| LMArena Instruction Following | 1298 | 1356 |
| IFEval | — | 95.1% |

## Long Context

- Granite 4.2 8B: 40.2 (#154)
- Grok-3 mini: 41.0 (#142)

| Benchmark | Granite 4.2 8B | Grok-3 mini |
|---|---|---|
| LMArena Longer Query | 1323 | 1372 |
| Fiction.LiveBench | — | 66.7% |

## Writing & Preference

- Granite 4.2 8B: 49.8 (#183)
- Grok-3 mini: 52.7 (#163)

| Benchmark | Granite 4.2 8B | Grok-3 mini |
|---|---|---|
| LMArena Text | 1319 | 1370 |
| LMArena Creative Writing | 1238 | 1342 |
| LMArena Multi-Turn | 1299 | 1355 |
| Short-Story Creative Writing | — | 73.5% |
| WildBench | — | 65.1% |

## FAQ

### Is Granite 4.2 8B better than Grok-3 mini?

Granite 4.2 8B and Grok-3 mini score almost the same on the Noometry Index (40.0 vs 41.0), so choose on price, context window or the category you care about most.

### Is Granite 4.2 8B or Grok-3 mini better for coding?

They score almost the same on coding (39.9 vs 40.4); test both on your own repository before choosing.

### How many benchmarks do Granite 4.2 8B and Grok-3 mini share?

11 benchmarks have published results for both models. Granite 4.2 8B has 11 scored results on Noometry and Grok-3 mini has 35.