# Grok-3 mini vs o3-pro

> o3-pro is the stronger model overall, scoring 42.9 to 41.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-3-mini-vs-o3-pro
- Last updated: 2026-10-11
- Shared benchmarks: 9

## Summary

- They share 9 benchmarks with published results for both. Grok-3 mini scores higher in 1 category and o3-pro in 4 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in long context, where o3-pro leads 72.2 to 41.0.
- The biggest single-benchmark swing is ARC-AGI-1: 16.5% for Grok-3 mini and 59.3% for o3-pro.

## Snapshot

| | Grok-3 mini | o3-pro |
|---|---|---|
| Provider | xAI | OpenAI |
| Noometry Index | 41.2 | 42.9 |
| Rank | 141 | 105 |
| Context | — | 200K |
| Input $/M | — | $20 |
| Output $/M | — | $80 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok-3 mini: 40.8 (#131)
- o3-pro: 55.5 (#24)

| Benchmark | Grok-3 mini | o3-pro |
|---|---|---|
| Aider Polyglot | 49.3% | 84.9% |
| WeirdML | 42.6% | 58.2% |
| LMArena Coding | 1379 | — |

## Reasoning

- Grok-3 mini: 13.6 (#334)
- o3-pro: 23.8 (#171)

| Benchmark | Grok-3 mini | o3-pro |
|---|---|---|
| ARC-AGI-2 | 0.4% | 4.9% |
| Kagi LLM Benchmark | 61.3% | 72.1% |
| ARC-AGI-1 | 16.5% | 59.3% |
| Epoch Capabilities Index | 140.35 | 147.42 |
| LMArena Hard Prompts | 1375 | — |
| DTBench | — | 86.9% |
| LMCA | — | 38.5% |

## Math

- Grok-3 mini: 42.1 (#85)
- o3-pro: —

| Benchmark | Grok-3 mini | o3-pro |
|---|---|---|
| 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

- Grok-3 mini: 46.4 (#81)
- o3-pro: 29.5 (#238)

| Benchmark | Grok-3 mini | o3-pro |
|---|---|---|
| Confabulations | 10.8% | 14.2% |
| GPQA Diamond | 76.3% | — |
| MMLU-Pro | 79.9% | — |
| Vectara Hallucination Rate | — | 23.3% |
| GPQA (HELM) | 67.5% | — |
| LMArena Expert | 1395 | — |

## Multilingual

- Grok-3 mini: 48.1 (#145)
- o3-pro: —

| Benchmark | Grok-3 mini | o3-pro |
|---|---|---|
| LMArena Non-English | 1352 | — |
| LMArena Chinese | 1387 | — |
| LMArena French | 1357 | — |
| LMArena German | 1349 | — |
| LMArena Japanese | 1342 | — |
| LMArena Korean | 1335 | — |
| LMArena Russian | 1353 | — |
| LMArena Spanish | 1381 | — |

## Instruction Following

- Grok-3 mini: 78.5 (#9)
- o3-pro: —

| Benchmark | Grok-3 mini | o3-pro |
|---|---|---|
| IFEval | 95.1% | — |
| LMArena Instruction Following | 1357 | — |

## Long Context

- Grok-3 mini: 41.0 (#147)
- o3-pro: 72.2 (#1)

| Benchmark | Grok-3 mini | o3-pro |
|---|---|---|
| Fiction.LiveBench | 66.7% | 97.2% |
| LMArena Longer Query | 1372 | — |

## Writing & Preference

- Grok-3 mini: 52.5 (#169)
- o3-pro: 57.1 (#133)

| Benchmark | Grok-3 mini | o3-pro |
|---|---|---|
| Short-Story Creative Writing | 73.5% | 84.4% |
| LMArena Text | 1370 | — |
| LMArena Creative Writing | 1342 | — |
| WildBench | 65.1% | — |
| LMArena Multi-Turn | 1355 | — |

## FAQ

### Is Grok-3 mini better than o3-pro?

o3-pro is the stronger model overall, scoring 42.9 to 41.2 on the Noometry Index.

### Is Grok-3 mini or o3-pro better for coding?

o3-pro scores higher on coding benchmarks: 55.5 versus 40.8 in the Noometry coding category.

### How many benchmarks do Grok-3 mini and o3-pro share?

9 benchmarks have published results for both models. Grok-3 mini has 35 scored results on Noometry and o3-pro has 12.