# GPT-5.4 Pro vs Hy4 preview

> Side-by-side benchmark comparison for GPT-5.4 Pro and Hy4 preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-4-pro-vs-hy4-preview
- Last updated: September 21, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.4 Pro and Hy4 preview share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Hy4 preview has the lower published output-token price.
- GPT-5.4 Pro has the larger published context window at 1.05M.

## Model Snapshot

| Property | GPT-5.4 Pro | Hy4 preview |
|----------|----------|----------|
| Creator | OpenAI | Tencent |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Independent public score (not head-to-head) | 60.65 | 60.61 |
| Benchmarks Covered | 10 | 29 |
| Pricing (input/output) | $30.00 / $180.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: 56.5 (Estimated · #34/154)
- Hy4 preview public-lane score: 53.7 (Estimated · #39/154)

| Benchmark | GPT-5.4 Pro | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| BrowseComp | 89.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 85.4% | Coming soon |
| CyberGym | Coming soon | 78.4% | Coming soon |
| WideResearch | Coming soon | 83.9% | Coming soon |
| DRACO | Coming soon | 77.2% | Coming soon |
| MCP Atlas | Coming soon | 83.7% | Coming soon |
| Toolathlon-Verified | Coming soon | 74.1% | Coming soon |
| APEX-Agents | Coming soon | 37.1% | Coming soon |
| skillsBench | Coming soon | 62.9% | Coming soon |
| JobBench | Coming soon | 61.7% | Coming soon |
| Agents' Last Exam | Coming soon | 22.8% | Coming soon |
| AutomationBench | Coming soon | 32.1% | Coming soon |
| BankerToolBench | Coming soon | 78.6% | Coming soon |
| HLE w/ tools | Coming soon | 55.4% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 55.1% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: Coming soon
- Hy4 preview public-lane score: 62.8 (Supported · #17/156)

| Benchmark | GPT-5.4 Pro | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | Coming soon | 85.4% | Coming soon |
| SWE-bench Pro | Coming soon | 65.7% | Coming soon |
| SWE Multilingual | Coming soon | 82.9% | Coming soon |
| DeepSWE | Coming soon | 64.3% | Coming soon |
| NL2Repo | Coming soon | 58.9% | Coming soon |
| ProgramBench | Coming soon | 17.5% | Coming soon |
| PostTrain Bench | Coming soon | 35.6% | Coming soon |
| sweMarathon | Coming soon | 31.9% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: 70.2 (Unranked · 2 rankable rows)
- Hy4 preview public-lane score: Coming soon

| Benchmark | GPT-5.4 Pro | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 83.3% | Coming soon | Coming soon |
| CritPt | Coming soon | 16.9% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: Coming soon
- Hy4 preview public-lane score: 84.9 (Unranked · 1 rankable row)

| Benchmark | GPT-5.4 Pro | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | Coming soon | 66.2% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: 59 (Estimated · #39/186)
- Hy4 preview public-lane score: 56.1 (Estimated · #48/186)

| Benchmark | GPT-5.4 Pro | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| HLE | 58.7% | 55.4% | GPT-5.4 Pro |
| FrontierScience | 36.7% | Coming soon | Coming soon |
| FrontierScience Research | 36.7% | Coming soon | Coming soon |
| HLE w/o tools | 42.7% | 43.4% | Hy4 preview |
| GPQA | Coming soon | 92.3% | Coming soon |
| GPQA-D | Coming soon | 92.3% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: 68.8 (Unranked · 4 rankable rows)
- Hy4 preview public-lane score: Coming soon

| Benchmark | GPT-5.4 Pro | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| IPhO 2025 (Theory) | 93.5% | Coming soon | Coming soon |
| FrontierMath (legacy) | 50% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 50.000% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 37.500% | Coming soon | Coming soon |
| Apex | Coming soon | 74.2% | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-5.4 Pro and Hy4 preview?

Not yet. The models share only 2 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [GPT-5.4 Pro vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-pro)
- [Hy4 preview vs GPT-5.4](/compare/gpt-5-4-vs-hy4-preview)
- [GPT-5.4 Pro vs GPT-5.4 mini](/compare/gpt-5-4-mini-vs-gpt-5-4-pro)
- [Hy4 preview vs GPT-5.4 mini](/compare/gpt-5-4-mini-vs-hy4-preview)

## Explore More

- [GPT-5.4 Pro profile](/models/gpt-5-4-pro)
- [Hy4 preview profile](/models/hy4-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)