# d1-ultra vs DeepSeek V4.1 Flash

> Side-by-side benchmark comparison for d1-ultra and DeepSeek V4.1 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/d1-ultra-vs-deepseek-v4-1-flash
- Last updated: October 15, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for d1-ultra and DeepSeek V4.1 Flash.

## Summary

- d1-ultra and DeepSeek V4.1 Flash do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | d1-ultra | DeepSeek V4.1 Flash |
|----------|----------|----------|
| Creator | Liquid AI | DeepSeek |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | null | 1M |
| Independent public score (not head-to-head) | null | 65.59 |
| Benchmarks Covered | 0 | 31 |
| Pricing (input/output) | $0.042 / $0.00 | $0.30 / $1.20 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- d1-ultra public-lane score: Coming soon
- DeepSeek V4.1 Flash public-lane score: 62.1 (Supported · #24/127)

| Benchmark | d1-ultra | DeepSeek V4.1 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | Coming soon | 90.6% | Coming soon |
| terminalBench3 | Coming soon | 30% | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 31.20% | Coming soon |
| CyberGym | Coming soon | 88.1% | Coming soon |
| ExploitGym | Coming soon | 15.3% | Coming soon |
| HLE w/ tools | Coming soon | 63.9% | Coming soon |
| AutomationBench | Coming soon | 54.8% | Coming soon |
| Agents' Last Exam | Coming soon | 31.8% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 74.5% | Coming soon |
| CWE-bench v1 | Coming soon | 55.0% | Coming soon |
| Hermes Index | Coming soon | 36.9% | Coming soon |
| Hermes Bench | Coming soon | 70.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- d1-ultra public-lane score: Coming soon
- DeepSeek V4.1 Flash public-lane score: 60.7 (Supported · #18/150)

| Benchmark | d1-ultra | DeepSeek V4.1 Flash | Winner |
|-----------|-----------|-----------|--------|
| Codeforces | Coming soon | 3471.0 | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 90.6% | Coming soon |
| terminalBench3 | Coming soon | 30% | Coming soon |
| DeepSWE | Coming soon | 74.2% | Coming soon |
| ProgramBench | Coming soon | 20.3% | Coming soon |
| NL2Repo | Coming soon | 65.4% | Coming soon |
| OpenHarmony Bench | Coming soon | 60.3% | Coming soon |
| Bug Hunt Bench | Coming soon | 21.7 fixes | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- d1-ultra public-lane score: Coming soon
- DeepSeek V4.1 Flash public-lane score: 83.4 (Unranked · 4 rankable rows)

| Benchmark | d1-ultra | DeepSeek V4.1 Flash | Winner |
|-----------|-----------|-----------|--------|
| JevBench 1.4 | Coming soon | 4.77 | Coming soon |
| JevBench 1.5 | Coming soon | 6.65 | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- d1-ultra public-lane score: Coming soon
- DeepSeek V4.1 Flash public-lane score: 77.9 (Unranked · 1 rankable row)

| Benchmark | d1-ultra | DeepSeek V4.1 Flash | Winner |
|-----------|-----------|-----------|--------|
| Chartography (tools) | Coming soon | 78.9% | Coming soon |
| BabyVision w/ Python | Coming soon | 89.6% | Coming soon |
| ZeroBench w/ Python | Coming soon | 49.0% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- d1-ultra public-lane score: Coming soon
- DeepSeek V4.1 Flash public-lane score: 65.3 (Supported · #33/184)

| Benchmark | d1-ultra | DeepSeek V4.1 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 90.9% | Coming soon |
| GPQA-D | Coming soon | 90.9% | Coming soon |
| HLE | Coming soon | 36.8% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- d1-ultra public-lane score: Coming soon
- DeepSeek V4.1 Flash public-lane score: 70.1 (Unranked · 3 rankable rows)

| Benchmark | d1-ultra | DeepSeek V4.1 Flash | Winner |
|-----------|-----------|-----------|--------|
| Apex | Coming soon | 65.6% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 67.368% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 26.829% | Coming soon |

## FAQ

### Can I compare d1-ultra and DeepSeek V4.1 Flash on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [d1-ultra vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-d1-ultra)
- [DeepSeek V4.1 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-deepseek-v4-1-flash)
- [d1-ultra vs GPT-6.1 Sol](/compare/d1-ultra-vs-gpt-6-1-sol)
- [DeepSeek V4.1 Flash vs GPT-6.1 Sol](/compare/deepseek-v4-1-flash-vs-gpt-6-1-sol)

## Explore More

- [d1-ultra profile](/models/d1-ultra)
- [DeepSeek V4.1 Flash profile](/models/deepseek-v4-1-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)