# DeepSeek V4.1 Flash 1017 vs SWE-2 Flash

> Side-by-side benchmark comparison for DeepSeek V4.1 Flash 1017 and SWE-2 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/deepseek-v4-1-flash-vs-swe-2-flash
- Last updated: November 5, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick DeepSeek V4.1 Flash 1017 if you want the stronger benchmark profile. SWE-2 Flash only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- DeepSeek V4.1 Flash 1017 leads overall 65.35 to 0.
- The biggest single benchmark swing is Terminal-Bench 4.0 in Agentic, with scores of 42.30% and 20.00%.
- SWE-2 Flash 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 1017 | SWE-2 Flash |
|----------|----------|----------|
| Creator | DeepSeek | Cognition |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 65.35 | null |
| Benchmarks Covered | 35 | 7 |
| Pricing (input/output) | $0.30 / $1.20 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Not comparable
- DeepSeek V4.1 Flash 1017 public-lane score: 62.2 (Supported · #21/135)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash 1017 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 90.6% | 89.2% | DeepSeek V4.1 Flash 1017 |
| terminalBench3 | 30% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | 42.30% | 20.00% | DeepSeek V4.1 Flash 1017 |
| CyberGym | 88.1% | Coming soon | Coming soon |
| ExploitGym | 15.3% | Coming soon | Coming soon |
| HLE w/ tools | 63.9% | Coming soon | Coming soon |
| AutomationBench | 60.5% | Coming soon | Coming soon |
| Agents' Last Exam | 35.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 74.5% | Coming soon | Coming soon |
| CWE-bench v1 | 55.0% | Coming soon | Coming soon |
| MazeBench | 1% | Coming soon | Coming soon |

### Coding

- Winner: Not comparable
- DeepSeek V4.1 Flash 1017 public-lane score: 62.8 (Supported · #14/156)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash 1017 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| ScarfBench | 69.0% | Coming soon | Coming soon |
| Codeforces | 3471.0 | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 90.6% | 89.2% | DeepSeek V4.1 Flash 1017 |
| terminalBench3 | 30% | Coming soon | Coming soon |
| DeepSWE | 77.0% | 60.1% | DeepSeek V4.1 Flash 1017 |
| ProgramBench | 29.1% | Coming soon | Coming soon |
| NL2Repo | 68.2% | Coming soon | Coming soon |
| OpenHarmony Bench | 60.3% | Coming soon | Coming soon |
| Bug Hunt Bench | 39.1 fixes | Coming soon | Coming soon |
| FrontierCode 2.0 | 19.3% | 24.0% | SWE-2 Flash |
| FrontierCode 1.1 Main | Coming soon | 45.5% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 50.0% | Coming soon |

### Reasoning

- Winner: Not comparable
- DeepSeek V4.1 Flash 1017 public-lane score: 82.5 (Unranked · 4 rankable rows)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash 1017 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| STEMBench | 2.54 | Coming soon | Coming soon |
| JevBench 1.4 | 4.77 | Coming soon | Coming soon |
| JevBench 1.5 | 6.65 | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- DeepSeek V4.1 Flash 1017 public-lane score: 78.2 (Unranked · 1 rankable row)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash 1017 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| ExtractBench (LlamaIndex) | 87.11% | Coming soon | Coming soon |
| ParseBench | 64.38% | Coming soon | Coming soon |
| Chartography (tools) | 83.0% | Coming soon | Coming soon |
| BabyVision w/ Python | 92.5% | Coming soon | Coming soon |
| ZeroBench w/ Python | 51.0% | Coming soon | Coming soon |

### Knowledge

- Winner: Not comparable
- DeepSeek V4.1 Flash 1017 public-lane score: 64.4 (Supported · #38/177)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash 1017 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 90.9% | Coming soon | Coming soon |
| GPQA-D | 90.9% | Coming soon | Coming soon |
| HLE | 42.6% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- DeepSeek V4.1 Flash 1017 public-lane score: 70.1 (Unranked · 3 rankable rows)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash 1017 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| Apex | 65.6% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 67.368% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 26.829% | Coming soon | Coming soon |

## FAQ

### Which is better overall, DeepSeek V4.1 Flash 1017 or SWE-2 Flash?

DeepSeek V4.1 Flash 1017 is ahead overall on BenchLM right now.

### How many benchmarks does DeepSeek V4.1 Flash 1017 cover on BenchLM?

DeepSeek V4.1 Flash 1017 currently has 35 sourced benchmark scores on BenchLM.

### How many benchmarks does SWE-2 Flash cover on BenchLM?

SWE-2 Flash currently has 7 sourced benchmark scores on BenchLM.

## Related Comparisons

- [DeepSeek V4.1 Flash 1017 vs SWE-1.7](/compare/deepseek-v4-1-flash-vs-swe-1-7)
- [SWE-2 Flash vs SWE-1.7](/compare/swe-1-7-vs-swe-2-flash)
- [DeepSeek V4.1 Flash 1017 vs SWE-2](/compare/deepseek-v4-1-flash-vs-swe-2)
- [SWE-2 Flash vs SWE-2](/compare/swe-2-vs-swe-2-flash)

## Explore More

- [DeepSeek V4.1 Flash 1017 profile](/models/deepseek-v4-1-flash)
- [SWE-2 Flash profile](/models/swe-2-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)