# Grok-3 mini vs o3

> o3 is the stronger model overall, scoring 47.4 to 41.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-3-mini-vs-o3
- Last updated: 2026-10-10
- Shared benchmarks: 35

## Summary

- They share 35 benchmarks with published results for both. Grok-3 mini scores higher in 1 category and o3 in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where o3 leads 32.1 to 13.8.
- The biggest single-benchmark swing is ARC-AGI-1: 16.5% for Grok-3 mini and 60.8% for o3.

## Snapshot

| | Grok-3 mini | o3 |
|---|---|---|
| Provider | xAI | OpenAI |
| Noometry Index | 41.0 | 47.4 |
| Rank | 130 | 53 |
| Context | — | 200K |
| Input $/M | — | $2 |
| Output $/M | — | $8 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok-3 mini: 40.4 (#126)
- o3: 47.3 (#57)

| Benchmark | Grok-3 mini | o3 |
|---|---|---|
| Aider Polyglot | 49.3% | 81.3% |
| WeirdML | 42.6% | 52.4% |
| LMArena Coding | 1380 | 1408 |
| SWE-bench Verified | — | 62.3% |
| SWE-bench Verified (bash only) | — | 58.4% |
| GSO | — | 8.8% |
| CadEval | — | 74% |
| ALE-Bench | — | 933.55 |

## Agentic & Tool Use

- Grok-3 mini: —
- o3: 34.3 (#42)

| Benchmark | Grok-3 mini | o3 |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 63% |
| GDPval | — | 30.8% |
| DeepResearch Bench | — | 45.2% |
| OSWorld | — | 23% |
| LMArena Search | — | 1144 |
| METR Time Horizons | — | 65.4% |

## Reasoning

- Grok-3 mini: 13.8 (#323)
- o3: 32.1 (#66)

| Benchmark | Grok-3 mini | o3 |
|---|---|---|
| ARC-AGI-2 | 0.4% | 6.5% |
| Kagi LLM Benchmark | 61.3% | 67.6% |
| ARC-AGI-1 | 16.5% | 60.8% |
| LMArena Hard Prompts | 1374 | 1402 |
| Epoch Capabilities Index | 140.35 | 146.88 |
| SimpleBench | — | 53.1% |
| CritPt | — | 1.4% |
| Chess Puzzles | — | 38% |
| EnigmaEval | — | 13.1% |
| Mystery Game Puzzles | — | 29% |
| DTBench | — | 84.8% |
| LMCA | — | 39.7% |
| ForecastBench | — | 62.5 |

## Math

- Grok-3 mini: 40.3 (#78)
- o3: 48.9 (#49)

| Benchmark | Grok-3 mini | o3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 77.8% | 84.4% |
| Omni-MATH | 31.8% | 71.4% |
| LMArena Math | 1386 | 1426 |
| MATH Level 5 | 90.9% | 97.8% |
| FrontierMath (Feb 2025 set) | 5.9% | 18.7% |
| FrontierMath (Tiers 1-3) | — | 33.3% |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- Grok-3 mini: 46.3 (#75)
- o3: 54.5 (#47)

| Benchmark | Grok-3 mini | o3 |
|---|---|---|
| GPQA Diamond | 76.3% | 81.8% |
| MMLU-Pro | 79.9% | 85.9% |
| Confabulations | 10.8% | 14.4% |
| GPQA (HELM) | 67.5% | 75.3% |
| LMArena Expert | 1395 | 1403 |
| Humanity's Last Exam | — | 20.3% |
| SimpleQA Verified | — | 49.4% |

## Multimodal

- Grok-3 mini: —
- o3: 40.7 (#35)

| Benchmark | Grok-3 mini | o3 |
|---|---|---|
| LMArena Vision | — | 1214 |
| GeoBench | — | 74% |
| VPCT | — | 52% |

## Multilingual

- Grok-3 mini: 48.3 (#141)
- o3: 51.9 (#99)

| Benchmark | Grok-3 mini | o3 |
|---|---|---|
| LMArena Non-English | 1352 | 1402 |
| LMArena Chinese | 1387 | 1438 |
| LMArena French | 1357 | 1430 |
| LMArena German | 1350 | 1420 |
| LMArena Japanese | 1343 | 1404 |
| LMArena Korean | 1336 | 1371 |
| LMArena Russian | 1352 | 1407 |
| LMArena Spanish | 1379 | 1395 |

## Instruction Following

- Grok-3 mini: 78.7 (#8)
- o3: 73.0 (#122)

| Benchmark | Grok-3 mini | o3 |
|---|---|---|
| IFEval | 95.1% | 86.9% |
| LMArena Instruction Following | 1356 | 1368 |

## Long Context

- Grok-3 mini: 41.0 (#142)
- o3: 53.2 (#6)

| Benchmark | Grok-3 mini | o3 |
|---|---|---|
| Fiction.LiveBench | 66.7% | 88.9% |
| LMArena Longer Query | 1372 | 1372 |
| CL-bench | — | 17.8% |

## Writing & Preference

- Grok-3 mini: 52.7 (#163)
- o3: 63.7 (#62)

| Benchmark | Grok-3 mini | o3 |
|---|---|---|
| LMArena Text | 1370 | 1410 |
| LMArena Creative Writing | 1342 | 1359 |
| Short-Story Creative Writing | 73.5% | 83.9% |
| WildBench | 65.1% | 86.1% |
| LMArena Multi-Turn | 1355 | 1405 |
| EQ-Bench Creative Writing | — | 1676 |

## FAQ

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

o3 is the stronger model overall, scoring 47.4 to 41.0 on the Noometry Index.

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

o3 scores higher on coding benchmarks: 47.3 versus 40.4 in the Noometry coding category.

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

35 benchmarks have published results for both models. Grok-3 mini has 35 scored results on Noometry and o3 has 63.