# GPT-5.5 vs Hy4

> Side-by-side benchmark comparison for GPT-5.5 and Hy4 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

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

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.5 and Hy4 share only 3 sourced benchmark rows.

## Summary

- Only 3 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.

## Model Snapshot

| Property | GPT-5.5 | Hy4 |
|----------|----------|----------|
| Creator | OpenAI | Tencent |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 68.82 | null |
| Benchmarks Covered | 46 | 15 |
| Pricing (input/output) | $5.00 / $30.00 | $0.834 / $2.501 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.5 public-lane score: 61 (Supported · #26/135)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.5 | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| LifeVal | 77.4% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 82% | Coming soon | Coming soon |
| CyberGym | 81.8% | Coming soon | Coming soon |
| BrowseComp | 84.4% | Coming soon | Coming soon |
| OSWorld-Verified | 78.7% | Coming soon | Coming soon |
| MCP Atlas | 75.3% | Coming soon | Coming soon |
| Toolathlon | 55.6% | Coming soon | Coming soon |
| τ²-bench results | 98% | Coming soon | Coming soon |
| Gert Labs | 72.93% | Coming soon | Coming soon |
| ResearchClawBench | 17.0% | Coming soon | Coming soon |
| OSWorld 2.0 | 13.0% | Coming soon | Coming soon |
| JobBench | 42.7% | Coming soon | Coming soon |
| ExploitGym | 13.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 76.4% | Coming soon | Coming soon |
| ApprenticeBench | 20% | Coming soon | Coming soon |
| MazeBench | 0% | 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-5.5 public-lane score: 62.3 (Supported · #15/156)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.5 | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 58.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 82.0% | Coming soon | Coming soon |
| Vibe Code Bench | 69.85% | Coming soon | Coming soon |
| React Native Evals | 84.7% | Coming soon | Coming soon |
| cursorBench31 | 59.2% | Coming soon | Coming soon |
| CursorBench 3.2 | 58.4% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 43.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 85.3% | Coming soon | Coming soon |
| SWE-bench (Vals) | 82.6% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 27.2% | Coming soon | Coming soon |
| FrontierCode 2.0 | 22.6% | 31.0% | Hy4 |
| DeepSWE | Coming soon | 74.9% | Coming soon |
| sweMarathon | Coming soon | 43.8% | Coming soon |
| ProgramBench | Coming soon | 30.0% | Coming soon |
| PostTrainBench v1.2 | Coming soon | 35.2% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.5 public-lane score: 69.7 (#17/26)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.5 | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| MRCR v2 64K-128K | 83.1% | Coming soon | Coming soon |
| MRCR v2 128K-256K | 87.5% | Coming soon | Coming soon |
| ARC-AGI-2 | 85% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.4% | Coming soon | Coming soon |
| ARC-AGI-1 | 95.00% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.5 public-lane score: 74.2 (#28/58)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.5 | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| ExtractBench (LlamaIndex) | 93.57% | Coming soon | Coming soon |
| ParseBench | 66.63% | Coming soon | Coming soon |
| MMMU-Pro | 81.2% | 78.6% | GPT-5.5 |
| MMMU-Pro w/ Python | 83.2% | Coming soon | Coming soon |
| OfficeQA Pro | 54.1% | Coming soon | Coming soon |
| ZeroBench w/ Python | Coming soon | 55.4% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.5 public-lane score: 71.2 (Supported · #15/179)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.5 | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 93.6% | Coming soon | Coming soon |
| GPQA-D | 93.6% | Coming soon | Coming soon |
| HLE | 52.2% | 59.1% | Hy4 |
| HLE w/o tools | 41.4% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 93.2% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 88.1% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.5 public-lane score: 93.3 (#9/157)
- Hy4 public-lane score: Coming soon

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.5 public-lane score: 91.2 (Unranked · 3 rankable rows)
- Hy4 public-lane score: Coming soon

| Benchmark | GPT-5.5 | Hy4 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 51.7% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 85.263% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 72.500% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-5.5 and Hy4?

Not yet. The models share only 3 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-5.5 vs GPT-5.5 Pro](/compare/gpt-5-5-vs-gpt-5-5-pro)
- [Hy4 vs GPT-5.5 Pro](/compare/gpt-5-5-pro-vs-hy4)
- [GPT-5.5 vs Hy4 preview](/compare/gpt-5-5-vs-hy4-preview)
- [Hy4 vs Hy4 preview](/compare/hy4-vs-hy4-preview)

## Explore More

- [GPT-5.5 profile](/models/gpt-5-5)
- [Hy4 profile](/models/hy4)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)