# Grok 4.20 Multi-Agent vs Hy4 preview

> Grok 4.20 Multi-Agent and Hy4 preview score almost the same on the Noometry Index (45.5 vs 44.6), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/grok-4-20-multi-agent-vs-hy4-preview
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. Grok 4.20 Multi-Agent scores higher in 1 category and Hy4 preview in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Hy4 preview leads 54.5 to 36.6.
- The biggest single-benchmark swing is NYT Connections (extended): 89.6% for Grok 4.20 Multi-Agent and 68.2% for Hy4 preview.
- Hy4 preview is cheaper at $0.83 / $2.50 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 Multi-Agent.
- Hy4 preview accepts more context: 1.05M tokens versus 1M.
- Hy4 preview has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.20 Multi-Agent | Hy4 preview |
|---|---|---|
| Provider | xAI | Tencent |
| Noometry Index | 45.5 | 44.6 |
| Rank | 62 | 73 |
| Context | 1M | 1.05M |
| Input $/M | $1.25 | $0.83 |
| Output $/M | $2.50 | $2.50 |
| Weights | Proprietary | Open |

## Coding

- Grok 4.20 Multi-Agent: 42.4 (#91)
- Hy4 preview: 51.4 (#36)

| Benchmark | Grok 4.20 Multi-Agent | Hy4 preview |
|---|---|---|
| LMArena WebDev | — | 1633 |
| LMArena Coding | 1458 | — |

## Agentic & Tool Use

- Grok 4.20 Multi-Agent: —
- Hy4 preview: —

| Benchmark | Grok 4.20 Multi-Agent | Hy4 preview |
|---|---|---|
| LMArena Search | 1204 | — |

## Reasoning

- Grok 4.20 Multi-Agent: 42.4 (#44)
- Hy4 preview: 30.6 (#75)

| Benchmark | Grok 4.20 Multi-Agent | Hy4 preview |
|---|---|---|
| NYT Connections (extended) | 89.6% | 68.2% |
| LMArena Hard Prompts | 1448 | — |

## Math

- Grok 4.20 Multi-Agent: 36.6 (#106)
- Hy4 preview: 54.5 (#37)

| Benchmark | Grok 4.20 Multi-Agent | Hy4 preview |
|---|---|---|
| ProofBench | — | 75% |
| LMArena Math | 1441 | — |

## Knowledge

- Grok 4.20 Multi-Agent: 39.7 (#116)
- Hy4 preview: —

| Benchmark | Grok 4.20 Multi-Agent | Hy4 preview |
|---|---|---|
| LMArena Expert | 1445 | — |

## Multimodal

- Grok 4.20 Multi-Agent: 39.8 (#44)
- Hy4 preview: —

| Benchmark | Grok 4.20 Multi-Agent | Hy4 preview |
|---|---|---|
| LMArena Vision | 1259 | — |

## Multilingual

- Grok 4.20 Multi-Agent: 54.6 (#40)
- Hy4 preview: —

| Benchmark | Grok 4.20 Multi-Agent | Hy4 preview |
|---|---|---|
| LMArena Non-English | 1440 | — |
| LMArena Chinese | 1475 | — |
| LMArena French | 1467 | — |
| LMArena German | 1456 | — |
| LMArena Japanese | 1405 | — |
| LMArena Korean | 1416 | — |
| LMArena Russian | 1457 | — |
| LMArena Spanish | 1447 | — |

## Instruction Following

- Grok 4.20 Multi-Agent: 75.0 (#80)
- Hy4 preview: —

| Benchmark | Grok 4.20 Multi-Agent | Hy4 preview |
|---|---|---|
| LMArena Instruction Following | 1420 | — |

## Long Context

- Grok 4.20 Multi-Agent: 43.7 (#84)
- Hy4 preview: —

| Benchmark | Grok 4.20 Multi-Agent | Hy4 preview |
|---|---|---|
| LMArena Longer Query | 1430 | — |

## Writing & Preference

- Grok 4.20 Multi-Agent: 64.1 (#57)
- Hy4 preview: —

| Benchmark | Grok 4.20 Multi-Agent | Hy4 preview |
|---|---|---|
| LMArena Text | 1450 | — |
| LMArena Creative Writing | 1435 | — |
| LMArena Multi-Turn | 1451 | — |

## FAQ

### Is Grok 4.20 Multi-Agent better than Hy4 preview?

Grok 4.20 Multi-Agent and Hy4 preview score almost the same on the Noometry Index (45.5 vs 44.6), so choose on price, context window or the category you care about most.

### Which is cheaper, Grok 4.20 Multi-Agent or Hy4 preview?

Hy4 preview is cheaper. It lists at $0.83 per million input tokens and $2.50 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.

### Is Grok 4.20 Multi-Agent or Hy4 preview better for coding?

Hy4 preview scores higher on coding benchmarks: 51.4 versus 42.4 in the Noometry coding category.

### Which has the bigger context window?

Hy4 preview does, with 1.05M tokens against 1M.

### How many benchmarks do Grok 4.20 Multi-Agent and Hy4 preview share?

1 benchmark has published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Hy4 preview has 3.