# Hy4 preview vs LongCat-2.5

> Side-by-side benchmark comparison for Hy4 preview and LongCat-2.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/hy4-preview-vs-longcat-2-5
- Last updated: November 9, 2026

- Shared sourced benchmarks: 11
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Hy4 preview leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Hy4 preview has the higher overall point estimate 61.09 to 0. Conditional score ranges do not establish rank confidence.
- The biggest single benchmark swing is AutomationBench in Agentic, with scores of 32.1% and 51.8%.
- 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 | LongCat-2.5 |
|----------|----------|----------|
| Creator | Tencent | Meituan |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Hybrid |
| Context | 1M | 1M |
| Overall Score | 61.09 | null |
| Benchmarks Covered | 34 | 22 |
| Pricing (input/output) | $0.00 / $0.00 | $0.30 / $1.20 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Hy4 preview public-lane score: 56.9 (Estimated · #38/132)
- LongCat-2.5 public-lane score: Coming soon

| Benchmark | Hy4 preview | LongCat-2.5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 85.4% | 88.4% | LongCat-2.5 |
| CyberGym | 78.4% | Coming soon | Coming soon |
| WideResearch | 83.9% | Coming soon | Coming soon |
| DRACO | 77.2% | Coming soon | Coming soon |
| MCP Atlas | 83.7% | 83.1% | Hy4 preview |
| Toolathlon-Verified | 74.1% | Coming soon | Coming soon |
| APEX-Agents | 37.1% | Coming soon | Coming soon |
| skillsBench | 62.9% | 63.3% | LongCat-2.5 |
| JobBench | 61.7% | 65.4% | LongCat-2.5 |
| Agents' Last Exam | 22.8% | 38.5% | LongCat-2.5 |
| AutomationBench | 32.1% | 51.8% | LongCat-2.5 |
| BankerToolBench | 78.6% | Coming soon | Coming soon |
| HLE w/ tools | 55.4% | 63.1% | LongCat-2.5 |
| Terminal-Bench 2.1 (Vals) | 55.1% | Coming soon | Coming soon |
| CWE-bench v1 | 53.0% | Coming soon | Coming soon |
| Hermes Index | 26.1% | Coming soon | Coming soon |
| Hermes Bench | 58.6% | Coming soon | Coming soon |
| CWE-bench | 47.3% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 38.50% | Coming soon |
| BrowseComp | Coming soon | 91.9% | Coming soon |
| SpreadsheetBench 2 | Coming soon | 34.9% | Coming soon |
| Claw-Eval | Coming soon | 78.3% | Coming soon |

### Coding

- Winner: Not comparable
- Hy4 preview public-lane score: 56.7 (Supported · #28/158)
- LongCat-2.5 public-lane score: Coming soon

| Benchmark | Hy4 preview | LongCat-2.5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 85.4% | 88.4% | LongCat-2.5 |
| SWE-bench Pro | 65.7% | Coming soon | Coming soon |
| SWE Multilingual | 82.9% | Coming soon | Coming soon |
| DeepSWE | 64.3% | 64.6% | LongCat-2.5 |
| NL2Repo | 58.9% | 60.5% | LongCat-2.5 |
| ProgramBench | 17.5% | 25.5% | LongCat-2.5 |
| PostTrain Bench | 35.6% | Coming soon | Coming soon |
| sweMarathon | 31.9% | Coming soon | Coming soon |
| PaperBench | Coming soon | 82.1% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 58.3% | Coming soon |

### Reasoning

- Winner: Not comparable
- Hy4 preview public-lane score: Coming soon
- LongCat-2.5 public-lane score: Coming soon

| Benchmark | Hy4 preview | LongCat-2.5 | Winner |
|-----------|-----------|-----------|--------|
| STEMBench | 2.59 | Coming soon | Coming soon |
| CritPt | 16.9% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Hy4 preview public-lane score: Coming soon
- LongCat-2.5 public-lane score: Coming soon

| Benchmark | Hy4 preview | LongCat-2.5 | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | 66.2% | Coming soon | Coming soon |
| Vision2Web | Coming soon | 78.6% | Coming soon |
| CharXiv | Coming soon | 90.2% | Coming soon |
| MathVision w/ Python | Coming soon | 96.5% | Coming soon |
| Video-MME | Coming soon | 85.2% | Coming soon |

### Knowledge

- Winner: Not comparable
- Hy4 preview public-lane score: 63.7 (Estimated · #35/179)
- LongCat-2.5 public-lane score: Coming soon

| Benchmark | Hy4 preview | LongCat-2.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.3% | Coming soon | Coming soon |
| GPQA-D | 92.3% | Coming soon | Coming soon |
| HLE | 55.4% | Coming soon | Coming soon |
| HLE w/o tools | 43.4% | Coming soon | Coming soon |
| FrontierScience | Coming soon | 77% | Coming soon |

### Mathematics

- Winner: Not comparable
- Hy4 preview public-lane score: Coming soon
- LongCat-2.5 public-lane score: Coming soon

| Benchmark | Hy4 preview | LongCat-2.5 | Winner |
|-----------|-----------|-----------|--------|
| Apex | 74.2% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Hy4 preview or LongCat-2.5?

Hy4 preview has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

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

Hy4 preview currently has 34 sourced benchmark scores on BenchLM.

### How many benchmarks does LongCat-2.5 cover on BenchLM?

LongCat-2.5 currently has 22 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Hy4 preview vs Hy4](/compare/hy4-vs-hy4-preview)
- [LongCat-2.5 vs Hy4](/compare/hy4-vs-longcat-2-5)
- [Hy4 preview vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-hy4-preview)
- [LongCat-2.5 vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-longcat-2-5)

## Explore More

- [Hy4 preview profile](/models/hy4-preview)
- [LongCat-2.5 profile](/models/longcat-2-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)