# DeepSeek V4.1 Flash vs Hy4 preview

> Side-by-side benchmark comparison for DeepSeek V4.1 Flash and Hy4 preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/deepseek-v4-1-flash-vs-hy4-preview
- Last updated: September 10, 2026

- Shared sourced benchmarks: 13
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Hy4 preview if you want the stronger benchmark profile. DeepSeek V4.1 Flash only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Hy4 preview leads overall 61.03 to 55.
- The biggest single benchmark swing is AutomationBench in Agentic, with scores of 54.8% and 32.1%.
- Hy4 preview is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | DeepSeek V4.1 Flash | Hy4 preview |
|----------|----------|----------|
| Creator | DeepSeek | Tencent |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | null | 61.03 |
| Benchmarks Covered | 21 | 28 |
| Pricing (input/output) | $0.30 / $1.20 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- Hy4 preview public-lane score: 58.7 (Estimated · #30/152)

| Benchmark | DeepSeek V4.1 Flash | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 90.6% | 85.4% | DeepSeek V4.1 Flash |
| terminalBench3 | 30% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | 31.20% | Coming soon | Coming soon |
| CyberGym | 88.1% | 78.4% | DeepSeek V4.1 Flash |
| ExploitGym | 15.3% | Coming soon | Coming soon |
| HLE w/ tools | 63.9% | 55.4% | DeepSeek V4.1 Flash |
| AutomationBench | 54.8% | 32.1% | DeepSeek V4.1 Flash |
| Agents' Last Exam | 31.8% | 22.8% | DeepSeek V4.1 Flash |
| 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 |
| BankerToolBench | Coming soon | 78.6% | Coming soon |

### Coding

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- Hy4 preview public-lane score: 59.6 (Estimated · #24/151)

| Benchmark | DeepSeek V4.1 Flash | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| Codeforces | 3471.0 | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 90.6% | 85.4% | DeepSeek V4.1 Flash |
| terminalBench3 | 30% | Coming soon | Coming soon |
| DeepSWE | 74.2% | 64.3% | DeepSeek V4.1 Flash |
| ProgramBench | 20.3% | 17.5% | DeepSeek V4.1 Flash |
| NL2Repo | 65.4% | 58.9% | DeepSeek V4.1 Flash |
| SWE-bench Pro | Coming soon | 65.7% | Coming soon |
| SWE Multilingual | Coming soon | 82.9% | Coming soon |
| PostTrain Bench | Coming soon | 35.6% | Coming soon |
| sweMarathon | Coming soon | 31.9% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- Hy4 preview public-lane score: 84.8 (Unranked · 1 rankable row)

| Benchmark | DeepSeek V4.1 Flash | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| Chartography (tools) | 78.9% | Coming soon | Coming soon |
| BabyVision w/ Python | 89.6% | Coming soon | Coming soon |
| ZeroBench w/ Python | 49.0% | Coming soon | Coming soon |
| OfficeQA Pro | Coming soon | 66.2% | Coming soon |

### Reasoning

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- Hy4 preview public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| CritPt | Coming soon | 16.9% | Coming soon |

### Knowledge

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- Hy4 preview public-lane score: 57 (Estimated · #46/182)

| Benchmark | DeepSeek V4.1 Flash | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 90.9% | 92.3% | Hy4 preview |
| GPQA-D | 90.9% | 92.3% | Hy4 preview |
| HLE | 36.8% | 55.4% | Hy4 preview |
| HLE w/o tools | Coming soon | 43.4% | Coming soon |

### Mathematics

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- Hy4 preview public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| Apex | 65.6% | 74.2% | Hy4 preview |

## FAQ

### Which is better overall, DeepSeek V4.1 Flash or Hy4 preview?

Hy4 preview is ahead overall on BenchLM right now.

### How many benchmarks does DeepSeek V4.1 Flash cover on BenchLM?

DeepSeek V4.1 Flash currently has 21 sourced benchmark scores on BenchLM.

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

Hy4 preview currently has 28 sourced benchmark scores on BenchLM.

## Related Comparisons

- [DeepSeek V4.1 Flash vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-deepseek-v4-1-flash)
- [Hy4 preview vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-hy4-preview)
- [DeepSeek V4.1 Flash vs GPT-6 Astra](/compare/deepseek-v4-1-flash-vs-gpt-6-astra)
- [Hy4 preview vs GPT-6 Astra](/compare/gpt-6-astra-vs-hy4-preview)

## Explore More

- [DeepSeek V4.1 Flash profile](/models/deepseek-v4-1-flash)
- [Hy4 preview profile](/models/hy4-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)