# Grok Build 0.1 vs Hy4 preview

> Hy4 preview is the stronger model overall, scoring 44.6 to 35.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-build-0-1-vs-hy4-preview
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where Hy4 preview leads 51.4 to 42.5.
- Both cost about the same: $1 input and $2 output per million tokens.
- Hy4 preview accepts more context: 1.05M tokens versus 256K.
- Hy4 preview has downloadable open weights; the other is API-only.

## Snapshot

| | Grok Build 0.1 | Hy4 preview |
|---|---|---|
| Provider | xAI | Tencent |
| Noometry Index | 35.8 | 44.6 |
| Rank | 214 | 73 |
| Context | 256K | 1.05M |
| Input $/M | $1 | $0.83 |
| Output $/M | $2 | $2.50 |
| Weights | Proprietary | Open |

## Coding

- Grok Build 0.1: 42.5 (#90)
- Hy4 preview: 51.4 (#36)

| Benchmark | Grok Build 0.1 | Hy4 preview |
|---|---|---|
| LMArena WebDev | — | 1633 |
| SciCode | 50.2% | — |

## Agentic & Tool Use

- Grok Build 0.1: 22.5 (#122)
- Hy4 preview: —

| Benchmark | Grok Build 0.1 | Hy4 preview |
|---|---|---|
| GBAEval | 2.4% | — |

## Reasoning

- Grok Build 0.1: 31.3 (#73)
- Hy4 preview: 30.6 (#75)

| Benchmark | Grok Build 0.1 | Hy4 preview |
|---|---|---|
| NYT Connections (extended) | — | 68.2% |
| CritPt | 9.1% | — |

## Math

- Grok Build 0.1: —
- Hy4 preview: 54.5 (#37)

| Benchmark | Grok Build 0.1 | Hy4 preview |
|---|---|---|
| ProofBench | — | 75% |

## FAQ

### Is Grok Build 0.1 better than Hy4 preview?

Hy4 preview is the stronger model overall, scoring 44.6 to 35.8 on the Noometry Index.

### Which is cheaper, Grok Build 0.1 or Hy4 preview?

Grok Build 0.1 is cheaper. It lists at $1 per million input tokens and $2 per million output tokens; Hy4 preview lists at $0.83 and $2.50.

### Is Grok Build 0.1 or Hy4 preview better for coding?

Hy4 preview scores higher on coding benchmarks: 51.4 versus 42.5 in the Noometry coding category.

### Which has the bigger context window?

Hy4 preview does, with 1.05M tokens against 256K.

### How many benchmarks do Grok Build 0.1 and Hy4 preview share?

0 benchmarks have published results for both models. Grok Build 0.1 has 3 scored results on Noometry and Hy4 preview has 3.