# Grok 4.20 Multi-Agent vs Phi 3 Mini 128k Instruct

> Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 29.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-20-multi-agent-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 4.20 Multi-Agent scores higher in 8 categories and Phi 3 Mini 128k Instruct in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4.20 Multi-Agent leads 64.0 to 27.1.
- Phi 3 Mini 128k Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.20 Multi-Agent | Phi 3 Mini 128k Instruct |
|---|---|---|
| Provider | xAI | Microsoft |
| Noometry Index | 46.2 | 29.7 |
| Rank | 65 | 305 |
| Context | 1M | — |
| Input $/M | $1.25 | — |
| Output $/M | $2.50 | — |
| Weights | Proprietary | Open |

## Coding

- Grok 4.20 Multi-Agent: 43.0 (#92)
- Phi 3 Mini 128k Instruct: 28.8 (#312)

| Benchmark | Grok 4.20 Multi-Agent | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Coding | 1457 | 1039 |
| BigCodeBench Instruct | — | 29.6% |
| BigCodeBench Complete | — | 40.6% |

## Agentic & Tool Use

- Grok 4.20 Multi-Agent: —
- Phi 3 Mini 128k Instruct: —

| Benchmark | Grok 4.20 Multi-Agent | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Search | 1204 | — |

## Reasoning

- Grok 4.20 Multi-Agent: 43.9 (#48)
- Phi 3 Mini 128k Instruct: 19.6 (#256)

| Benchmark | Grok 4.20 Multi-Agent | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Hard Prompts | 1448 | 1028 |
| NYT Connections (extended) | 89.6% | — |

## Math

- Grok 4.20 Multi-Agent: 39.4 (#104)
- Phi 3 Mini 128k Instruct: 31.6 (#222)

| Benchmark | Grok 4.20 Multi-Agent | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Math | 1442 | 1089 |

## Knowledge

- Grok 4.20 Multi-Agent: 40.4 (#119)
- Phi 3 Mini 128k Instruct: 26.8 (#254)

| Benchmark | Grok 4.20 Multi-Agent | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Expert | 1445 | 984 |

## Multimodal

- Grok 4.20 Multi-Agent: 40.5 (#48)
- Phi 3 Mini 128k Instruct: —

| Benchmark | Grok 4.20 Multi-Agent | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Vision | 1259 | — |

## Multilingual

- Grok 4.20 Multi-Agent: 54.4 (#43)
- Phi 3 Mini 128k Instruct: 25.2 (#285)

| Benchmark | Grok 4.20 Multi-Agent | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Non-English | 1440 | 1000 |
| LMArena Chinese | 1475 | 1016 |
| LMArena French | 1466 | 1039 |
| LMArena German | 1456 | 1006 |
| LMArena Japanese | 1405 | 899 |
| LMArena Korean | 1416 | 856 |
| LMArena Russian | 1457 | 1004 |
| LMArena Spanish | 1447 | 1059 |

## Instruction Following

- Grok 4.20 Multi-Agent: 74.8 (#84)
- Phi 3 Mini 128k Instruct: 51.8 (#294)

| Benchmark | Grok 4.20 Multi-Agent | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Instruction Following | 1420 | 1023 |

## Long Context

- Grok 4.20 Multi-Agent: 43.7 (#88)
- Phi 3 Mini 128k Instruct: 30.4 (#289)

| Benchmark | Grok 4.20 Multi-Agent | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Longer Query | 1431 | 996 |

## Writing & Preference

- Grok 4.20 Multi-Agent: 64.0 (#59)
- Phi 3 Mini 128k Instruct: 27.1 (#301)

| Benchmark | Grok 4.20 Multi-Agent | Phi 3 Mini 128k Instruct |
|---|---|---|
| LMArena Text | 1450 | 1050 |
| LMArena Creative Writing | 1436 | 1024 |
| LMArena Multi-Turn | 1452 | 989 |

## FAQ

### Is Grok 4.20 Multi-Agent better than Phi 3 Mini 128k Instruct?

Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 29.7 on the Noometry Index.

### Is Grok 4.20 Multi-Agent or Phi 3 Mini 128k Instruct better for coding?

Grok 4.20 Multi-Agent scores higher on coding benchmarks: 43.0 versus 28.8 in the Noometry coding category.

### How many benchmarks do Grok 4.20 Multi-Agent and Phi 3 Mini 128k Instruct share?

17 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Phi 3 Mini 128k Instruct has 19.