# DeepSeek V4.1 Flash vs Ultramarine 1 Flash

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

- Canonical page: https://benchlm.ai/compare/deepseek-v4-1-flash-vs-ultramarine-1-flash
- Last updated: October 15, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick DeepSeek V4.1 Flash if you want the stronger benchmark profile. Ultramarine 1 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 leads overall 65.53 to 0.
- The biggest single benchmark swing is DeepSWE in Coding, with scores of 74.2% and 61.5%.
- Ultramarine 1 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- DeepSeek V4.1 Flash also has the larger context window at 1M.

## Model Snapshot

| Property | DeepSeek V4.1 Flash | Ultramarine 1 Flash |
|----------|----------|----------|
| Creator | DeepSeek | Paper Instruments |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | Not disclosed |
| Overall Score | 65.53 | null |
| Benchmarks Covered | 29 | 5 |
| Pricing (input/output) | $0.30 / $1.20 | $0.15 / $0.50 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- DeepSeek V4.1 Flash public-lane score: 62 (Supported · #24/126)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 90.6% | 83.2% | DeepSeek V4.1 Flash |
| terminalBench3 | 30% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | 31.20% | Coming soon | Coming soon |
| CyberGym | 88.1% | Coming soon | Coming soon |
| ExploitGym | 15.3% | Coming soon | Coming soon |
| HLE w/ tools | 63.9% | Coming soon | Coming soon |
| AutomationBench | 54.8% | 50.2% | DeepSeek V4.1 Flash |
| Agents' Last Exam | 31.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 74.5% | Coming soon | Coming soon |
| CWE-bench v1 | 55.0% | Coming soon | Coming soon |
| JobBench | Coming soon | 62.9% | Coming soon |

### Coding

- Winner: Not comparable
- DeepSeek V4.1 Flash public-lane score: 60.7 (Supported · #18/149)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| Codeforces | 3471.0 | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 90.6% | 83.2% | DeepSeek V4.1 Flash |
| terminalBench3 | 30% | Coming soon | Coming soon |
| DeepSWE | 74.2% | 61.5% | DeepSeek V4.1 Flash |
| ProgramBench | 20.3% | Coming soon | Coming soon |
| NL2Repo | 65.4% | Coming soon | Coming soon |
| OpenHarmony Bench | 60.3% | Coming soon | Coming soon |
| Bug Hunt Bench | 21.7 fixes | Coming soon | Coming soon |

### Reasoning

- Winner: Not comparable
- DeepSeek V4.1 Flash public-lane score: 83.4 (Unranked · 4 rankable rows)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| 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 public-lane score: 77.9 (Unranked · 1 rankable row)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | Ultramarine 1 Flash | 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 |

### Knowledge

- Winner: Not comparable
- DeepSeek V4.1 Flash public-lane score: 65.2 (Supported · #34/182)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | DeepSeek V4.1 Flash | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 90.9% | Coming soon | Coming soon |
| GPQA-D | 90.9% | Coming soon | Coming soon |
| HLE | 36.8% | Coming soon | Coming soon |

### Mathematics

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

| Benchmark | DeepSeek V4.1 Flash | Ultramarine 1 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 or Ultramarine 1 Flash?

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

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

DeepSeek V4.1 Flash currently has 29 sourced benchmark scores on BenchLM.

### How many benchmarks does Ultramarine 1 Flash cover on BenchLM?

Ultramarine 1 Flash currently has 5 sourced benchmark scores on BenchLM.

## Related Comparisons

- [DeepSeek V4.1 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-deepseek-v4-1-flash)
- [Ultramarine 1 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-ultramarine-1-flash)
- [DeepSeek V4.1 Flash vs GPT-6.1 Sol](/compare/deepseek-v4-1-flash-vs-gpt-6-1-sol)
- [Ultramarine 1 Flash vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-ultramarine-1-flash)

## Explore More

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