# Grok 3 vs Phi 3 Mini 128k Instruct

> Grok 3 is the stronger model overall, scoring 39.9 to 29.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-3-vs-phi-3-mini-128k-instruct
- Last updated: 2026-10-11
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Grok 3 scores higher in 7 categories and Phi 3 Mini 128k Instruct in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 3 leads 55.8 to 27.1.
- Phi 3 Mini 128k Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 3 | Phi 3 Mini 128k Instruct |
|---|---|---|
| Provider | xAI | Microsoft |
| Noometry Index | 39.9 | 29.7 |
| Rank | 157 | 305 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Grok 3: 41.9 (#115)
- Phi 3 Mini 128k Instruct: 28.8 (#312)

| Benchmark | Grok 3 | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Coding | 1432 | 1039 |
| Aider Polyglot | 53.3% | — |
| WeirdML | 37.2% | — |
| BigCodeBench Instruct | — | 29.6% |
| BigCodeBench Complete | — | 40.6% |

## Agentic & Tool Use

- Grok 3: 30.5 (#76)
- Phi 3 Mini 128k Instruct: —

| Benchmark | Grok 3 | Phi 3 Mini 128k Instruct |
|---|---|---|
| BALROG | 29.5% | — |

## Reasoning

- Grok 3: 13.7 (#333)
- Phi 3 Mini 128k Instruct: 19.6 (#256)

| Benchmark | Grok 3 | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Hard Prompts | 1434 | 1028 |
| ARC-AGI-2 | 0% | — |
| SimpleBench | 36.1% | — |
| Kagi LLM Benchmark | 61.3% | — |
| ARC-AGI-1 | 5.5% | — |
| Epoch Capabilities Index | 138.33 | — |

## Math

- Grok 3: 38.0 (#145)
- Phi 3 Mini 128k Instruct: 31.6 (#222)

| Benchmark | Grok 3 | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Math | 1391 | 1089 |
| OTIS Mock AIME 2024-2025 | 55.6% | — |
| Omni-MATH | 46.4% | — |
| MATH Level 5 | 88.7% | — |
| FrontierMath (Feb 2025 set) | 3.8% | — |
| FrontierMath Tier 4 (v1) | 0% | — |

## Knowledge

- Grok 3: 46.2 (#82)
- Phi 3 Mini 128k Instruct: 26.8 (#254)

| Benchmark | Grok 3 | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Expert | 1421 | 984 |
| GPQA Diamond | 75.8% | — |
| MMLU-Pro | 78.8% | — |
| Confabulations | 14.2% | — |
| Vectara Hallucination Rate | 5.8% | — |
| GPQA (HELM) | 65% | — |

## Multilingual

- Grok 3: 52.3 (#87)
- Phi 3 Mini 128k Instruct: 25.2 (#285)

| Benchmark | Grok 3 | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Non-English | 1410 | 1000 |
| LMArena Chinese | 1448 | 1016 |
| LMArena French | 1460 | 1039 |
| LMArena German | 1431 | 1006 |
| LMArena Japanese | 1387 | 899 |
| LMArena Korean | 1373 | 856 |
| LMArena Russian | 1416 | 1004 |
| LMArena Spanish | 1417 | 1059 |

## Instruction Following

- Grok 3: 75.0 (#73)
- Phi 3 Mini 128k Instruct: 51.8 (#294)

| Benchmark | Grok 3 | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Instruction Following | 1409 | 1023 |
| IFEval | 88.4% | — |

## Long Context

- Grok 3: 38.7 (#192)
- Phi 3 Mini 128k Instruct: 30.4 (#289)

| Benchmark | Grok 3 | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Longer Query | 1439 | 996 |
| Fiction.LiveBench | 58.3% | — |

## Writing & Preference

- Grok 3: 55.8 (#141)
- Phi 3 Mini 128k Instruct: 27.1 (#301)

| Benchmark | Grok 3 | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Text | 1426 | 1050 |
| LMArena Creative Writing | 1414 | 1024 |
| LMArena Multi-Turn | 1425 | 989 |
| Short-Story Creative Writing | 76.4% | — |
| EQ-Bench Creative Writing | 1186 | — |
| WildBench | 84.9% | — |

## FAQ

### Is Grok 3 better than Phi 3 Mini 128k Instruct?

Grok 3 is the stronger model overall, scoring 39.9 to 29.7 on the Noometry Index.

### Is Grok 3 or Phi 3 Mini 128k Instruct better for coding?

Grok 3 scores higher on coding benchmarks: 41.9 versus 28.8 in the Noometry coding category.

### How many benchmarks do Grok 3 and Phi 3 Mini 128k Instruct share?

17 benchmarks have published results for both models. Grok 3 has 40 scored results on Noometry and Phi 3 Mini 128k Instruct has 19.