# GPT-5.4 mini vs Hy4

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

- Canonical page: https://benchlm.ai/compare/gpt-5-4-mini-vs-hy4
- Last updated: November 4, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.4 mini and Hy4 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 has the lower published output-token price.
- Hy4 has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-5.4 mini | Hy4 |
|----------|----------|----------|
| Creator | OpenAI | Tencent |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1M |
| Independent public score (not head-to-head) | 52.98 | null |
| Benchmarks Covered | 22 | 15 |
| Pricing (input/output) | $0.75 / $4.50 | $0.834 / $2.501 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 36.4 (Supported · #84/135)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 60% | Coming soon | Coming soon |
| OSWorld-Verified | 72.1% | Coming soon | Coming soon |
| MCP Atlas | 57.7% | Coming soon | Coming soon |
| Toolathlon | 42.9% | Coming soon | Coming soon |
| τ²-bench results | 93.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 54.7% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 44.40% | Coming soon |
| Terminal-Bench-Science 0.1 | Coming soon | 19.8% | Coming soon |
| HLE w/ tools | Coming soon | 59.1% | Coming soon |
| Agents' Last Exam | Coming soon | 41.0% | Coming soon |
| APEX-Agents | Coming soon | 75.2% | Coming soon |
| AutomationBench | Coming soon | 56.2% | Coming soon |
| OSWorld 2.1 | Coming soon | 78.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 35.3 (Supported · #80/156)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 60.0% | Coming soon | Coming soon |
| Vibe Code Bench | 47.97% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 27.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 81.5% | Coming soon | Coming soon |
| SWE-bench (Vals) | 73.0% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 74.9% | Coming soon |
| sweMarathon | Coming soon | 43.8% | Coming soon |
| ProgramBench | Coming soon | 30.0% | Coming soon |
| FrontierCode 2.0 | Coming soon | 31.0% | Coming soon |
| PostTrainBench v1.2 | Coming soon | 35.2% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 43.7 (Unranked · 4 rankable rows)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 63.70% | Coming soon | Coming soon |
| ARC-AGI-2 | 18.9% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 74 (#29/58)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 76.6% | 78.6% | Hy4 |
| MMMU-Pro w/ Python | 78% | Coming soon | Coming soon |
| ZeroBench w/ Python | Coming soon | 55.4% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 50.5 (Supported · #77/179)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 88% | Coming soon | Coming soon |
| HLE | 41.5% | 59.1% | Hy4 |
| HLE w/o tools | 28.2% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 83.1% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 84.6% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 89.9 (#30/157)
- Hy4 public-lane score: Coming soon

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 55.9 (Unranked · 2 rankable rows)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 51.228% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 9.756% | Coming soon | Coming soon |

## FAQ

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

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

## Explore More

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