# Grok-2 (Dec 2024) vs o3-pro

> o3-pro is the stronger model overall, scoring 42.9 to 33.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-2-vs-o3-pro
- Last updated: 2026-10-11
- Shared benchmarks: 5

## Summary

- They share 5 benchmarks with published results for both. Grok-2 (Dec 2024) scores higher in 1 category and o3-pro in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in long context, where o3-pro leads 72.2 to 38.8.
- The biggest single-benchmark swing is WeirdML: 22.2% for Grok-2 (Dec 2024) and 58.2% for o3-pro.

## Snapshot

| | Grok-2 (Dec 2024) | o3-pro |
|---|---|---|
| Provider | xAI | OpenAI |
| Noometry Index | 33.7 | 42.9 |
| Rank | 239 | 105 |
| Context | — | 200K |
| Input $/M | — | $20 |
| Output $/M | — | $80 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok-2 (Dec 2024): 33.3 (#258)
- o3-pro: 55.5 (#24)

| Benchmark | Grok-2 (Dec 2024) | o3-pro |
|---|---|---|
| WeirdML | 22.2% | 58.2% |
| Aider Polyglot | — | 84.9% |
| LiveBench Coding | 46.4% | — |
| LMArena Coding | 1287 | — |

## Reasoning

- Grok-2 (Dec 2024): 16.9 (#299)
- o3-pro: 23.8 (#171)

| Benchmark | Grok-2 (Dec 2024) | o3-pro |
|---|---|---|
| DTBench | 65.2% | 86.9% |
| Epoch Capabilities Index | 130.48 | 147.42 |
| ARC-AGI-2 | — | 4.9% |
| SimpleBench | 22.7% | — |
| Kagi LLM Benchmark | — | 72.1% |
| ARC-AGI-1 | — | 59.3% |
| LiveBench Reasoning | 54.8% | — |
| LMArena Hard Prompts | 1272 | — |
| LiveBench Data Analysis | 54.5% | — |
| LMCA | — | 38.5% |
| LiveBench | 54.3% | — |

## Math

- Grok-2 (Dec 2024): 20.8 (#284)
- o3-pro: —

| Benchmark | Grok-2 (Dec 2024) | o3-pro |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 11.5% | — |
| LiveBench Math | 54.9% | — |
| LMArena Math | 1283 | — |
| MATH Level 5 | 63.5% | — |
| FrontierMath (Feb 2025 set) | 0.7% | — |

## Knowledge

- Grok-2 (Dec 2024): 29.8 (#233)
- o3-pro: 29.5 (#238)

| Benchmark | Grok-2 (Dec 2024) | o3-pro |
|---|---|---|
| Confabulations | 20.1% | 14.2% |
| GPQA Diamond | 53.8% | — |
| Vectara Hallucination Rate | — | 23.3% |
| LMArena Expert | 1254 | — |

## Multilingual

- Grok-2 (Dec 2024): 43.1 (#188)
- o3-pro: —

| Benchmark | Grok-2 (Dec 2024) | o3-pro |
|---|---|---|
| LMArena Non-English | 1282 | — |
| LMArena Chinese | 1289 | — |
| LMArena French | 1318 | — |
| LMArena German | 1287 | — |
| LMArena Japanese | 1244 | — |
| LMArena Korean | 1237 | — |
| LMArena Russian | 1286 | — |
| LMArena Spanish | 1281 | — |

## Instruction Following

- Grok-2 (Dec 2024): 66.9 (#202)
- o3-pro: —

| Benchmark | Grok-2 (Dec 2024) | o3-pro |
|---|---|---|
| LiveBench Instruction Following | 69.6% | — |
| LMArena Instruction Following | 1270 | — |

## Long Context

- Grok-2 (Dec 2024): 38.8 (#190)
- o3-pro: 72.2 (#1)

| Benchmark | Grok-2 (Dec 2024) | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
| LMArena Longer Query | 1276 | — |

## Writing & Preference

- Grok-2 (Dec 2024): 48.6 (#198)
- o3-pro: 57.1 (#133)

| Benchmark | Grok-2 (Dec 2024) | o3-pro |
|---|---|---|
| Short-Story Creative Writing | 63.6% | 84.4% |
| LMArena Text | 1305 | — |
| LMArena Creative Writing | 1284 | — |
| LMArena Multi-Turn | 1290 | — |
| LiveBench Language | 45.6% | — |

## FAQ

### Is Grok-2 (Dec 2024) better than o3-pro?

o3-pro is the stronger model overall, scoring 42.9 to 33.7 on the Noometry Index.

### Is Grok-2 (Dec 2024) or o3-pro better for coding?

o3-pro scores higher on coding benchmarks: 55.5 versus 33.3 in the Noometry coding category.

### How many benchmarks do Grok-2 (Dec 2024) and o3-pro share?

5 benchmarks have published results for both models. Grok-2 (Dec 2024) has 34 scored results on Noometry and o3-pro has 12.