# Hy4 preview vs Step 5 Preview

> Side-by-side benchmark comparison for Hy4 preview and Step 5 Preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/hy4-preview-vs-step-5-preview
- Last updated: September 21, 2026

- Shared sourced benchmarks: 17
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Step 5 Preview if you want the stronger benchmark profile. Hy4 preview only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Step 5 Preview leads overall 72 to 60.61.
- The clearest category separation is in multimodal & grounded, where the averages are 84.9 for Hy4 preview and 61.2 for Step 5 Preview.
- The biggest single benchmark swing is ProgramBench in Coding, with scores of 17.5% and 80.5%.
- Hy4 preview is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Hy4 preview | Step 5 Preview |
|----------|----------|----------|
| Creator | Tencent | StepFun |
| Type | Open Weight | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 60.61 | null |
| Benchmarks Covered | 29 | 22 |
| Pricing (input/output) | $0.00 / $0.00 | $1.00 / $2.70 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Hy4 preview public-lane score: 53.7 (Estimated · #39/154)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Hy4 preview | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 85.4% | 85.0% | Hy4 preview |
| CyberGym | 78.4% | 84.7% | Step 5 Preview |
| WideResearch | 83.9% | Coming soon | Coming soon |
| DRACO | 77.2% | 83.3% | Step 5 Preview |
| MCP Atlas | 83.7% | 85.6% | Step 5 Preview |
| Toolathlon-Verified | 74.1% | 74.1% | Tie |
| APEX-Agents | 37.1% | 37.8% | Step 5 Preview |
| skillsBench | 62.9% | Coming soon | Coming soon |
| JobBench | 61.7% | 59.0% | Hy4 preview |
| Agents' Last Exam | 22.8% | 29.5% | Step 5 Preview |
| AutomationBench | 32.1% | 44.0% | Step 5 Preview |
| BankerToolBench | 78.6% | Coming soon | Coming soon |
| HLE w/ tools | 55.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 55.1% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 33.30% | Coming soon |
| BrowseComp | Coming soon | 88.7% | Coming soon |

### Coding

- Winner: Coming soon
- Hy4 preview public-lane score: 62.8 (Supported · #17/156)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Hy4 preview | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 85.4% | 85.0% | Hy4 preview |
| SWE-bench Pro | 65.7% | Coming soon | Coming soon |
| SWE Multilingual | 82.9% | Coming soon | Coming soon |
| DeepSWE | 64.3% | 67.7% | Step 5 Preview |
| NL2Repo | 58.9% | Coming soon | Coming soon |
| ProgramBench | 17.5% | 80.5% | Step 5 Preview |
| PostTrain Bench | 35.6% | Coming soon | Coming soon |
| sweMarathon | 31.9% | 72.7% | Step 5 Preview |
| SciCode | Coming soon | 58.9% | Coming soon |
| MLS-Bench Lite | Coming soon | 40.5% | Coming soon |

### Reasoning

- Winner: Coming soon
- Hy4 preview public-lane score: Coming soon
- Step 5 Preview public-lane score: 78.5 (Unranked · 2 rankable rows)

| Benchmark | Hy4 preview | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| CritPt | 16.9% | 20.9% | Step 5 Preview |

### Multimodal & Grounded

- Winner: Coming soon
- Hy4 preview public-lane score: 84.9 (Unranked · 1 rankable row)
- Step 5 Preview public-lane score: 61.2 (#28/49)

| Benchmark | Hy4 preview | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | 66.2% | 60.3% | Hy4 preview |
| MMMU-Pro | Coming soon | 76% | Coming soon |

### Knowledge

- Winner: Coming soon
- Hy4 preview public-lane score: 56.1 (Estimated · #48/186)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Hy4 preview | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.3% | Coming soon | Coming soon |
| GPQA-D | 92.3% | 93.5% | Step 5 Preview |
| HLE | 55.4% | 46.5% | Hy4 preview |
| HLE w/o tools | 43.4% | Coming soon | Coming soon |

### Mathematics

- Winner: Coming soon
- Hy4 preview public-lane score: Coming soon
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Hy4 preview | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| Apex | 74.2% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Hy4 preview or Step 5 Preview?

Step 5 Preview is ahead overall on BenchLM right now.

### Where is the biggest gap between Hy4 preview and Step 5 Preview?

The widest category gap is in multimodal & grounded, where the averages are 84.9 for Hy4 preview and 61.2 for Step 5 Preview.

### How many benchmarks does Hy4 preview cover on BenchLM?

Hy4 preview currently has 29 sourced benchmark scores on BenchLM.

### How many benchmarks does Step 5 Preview cover on BenchLM?

Step 5 Preview currently has 22 sourced benchmark scores on BenchLM.

## Related Comparisons

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- [Step 5 Preview vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-step-5-preview)
- [Hy4 preview vs GPT-6 Astra](/compare/gpt-6-astra-vs-hy4-preview)
- [Step 5 Preview vs GPT-6 Astra](/compare/gpt-6-astra-vs-step-5-preview)

## Explore More

- [Hy4 preview profile](/models/hy4-preview)
- [Step 5 Preview profile](/models/step-5-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)