# Hy4 preview vs Step 2 16k Exp 202412

> Hy4 preview is the stronger model overall, scoring 45.3 to 39.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/hy4-preview-vs-step-2-16k-exp-202412
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Hy4 preview leads 55.7 to 36.3.
- Hy4 preview has downloadable open weights; the other is API-only.

## Snapshot

| | Hy4 preview | Step 2 16k Exp 202412 |
|---|---|---|
| Provider | Tencent | StepFun |
| Noometry Index | 45.3 | 39.2 |
| Rank | 73 | 171 |
| Context | 1.05M | — |
| Input $/M | $0.83 | — |
| Output $/M | $2.50 | — |
| Weights | Open | Proprietary |

## Coding

- Hy4 preview: 51.6 (#38)
- Step 2 16k Exp 202412: 38.5 (#174)

| Benchmark | Hy4 preview | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena WebDev | 1632 | — |
| LMArena Coding | — | 1316 |

## Reasoning

- Hy4 preview: 31.9 (#79)
- Step 2 16k Exp 202412: 25.9 (#142)

| Benchmark | Hy4 preview | Step 2 16k Exp 202412 |
|---|---|---|
| NYT Connections (extended) | 68.2% | — |
| LMArena Hard Prompts | — | 1299 |

## Math

- Hy4 preview: 55.7 (#42)
- Step 2 16k Exp 202412: 36.3 (#169)

| Benchmark | Hy4 preview | Step 2 16k Exp 202412 |
|---|---|---|
| ProofBench | 75% | — |
| LMArena Math | — | 1304 |

## Knowledge

- Hy4 preview: —
- Step 2 16k Exp 202412: 35.2 (#187)

| Benchmark | Hy4 preview | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Expert | — | 1279 |

## Multilingual

- Hy4 preview: —
- Step 2 16k Exp 202412: 43.7 (#181)

| Benchmark | Hy4 preview | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Non-English | — | 1290 |
| LMArena Chinese | — | 1331 |
| LMArena Russian | — | 1324 |

## Instruction Following

- Hy4 preview: —
- Step 2 16k Exp 202412: 67.9 (#192)

| Benchmark | Hy4 preview | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Instruction Following | — | 1287 |

## Long Context

- Hy4 preview: —
- Step 2 16k Exp 202412: 39.7 (#170)

| Benchmark | Hy4 preview | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Longer Query | — | 1307 |

## Writing & Preference

- Hy4 preview: —
- Step 2 16k Exp 202412: 52.3 (#173)

| Benchmark | Hy4 preview | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Text | — | 1321 |
| LMArena Creative Writing | — | 1328 |
| LMArena Multi-Turn | — | 1292 |

## FAQ

### Is Hy4 preview better than Step 2 16k Exp 202412?

Hy4 preview is the stronger model overall, scoring 45.3 to 39.2 on the Noometry Index.

### Is Hy4 preview or Step 2 16k Exp 202412 better for coding?

Hy4 preview scores higher on coding benchmarks: 51.6 versus 38.5 in the Noometry coding category.

### How many benchmarks do Hy4 preview and Step 2 16k Exp 202412 share?

0 benchmarks have published results for both models. Hy4 preview has 3 scored results on Noometry and Step 2 16k Exp 202412 has 12.