DeepSeek V4 Flash vs Nemotron 3 Ultra
A side-by-side comparison of two llm models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Quick verdict: which should you choose?
Choose DeepSeek V4 Flash if you need
- ✓Choose DeepSeek V4 Flash if you need the lowest output price at $0.18 per million tokens for high-volume use.
- ✓Choose DeepSeek V4 Flash if you need documented output speed of 103.73 tokens per second.
- ✓Choose DeepSeek V4 Flash if you need an open-weight model with a known intelligence index of 46.5.
- ✓Choose DeepSeek V4 Flash if you need a slightly larger 1,048,576-token context window.
Choose Nemotron 3 Ultra if you need
- ✓Choose Nemotron 3 Ultra if you need optimization for NVIDIA hardware deployment.
- ✓Choose Nemotron 3 Ultra if you need a proprietary model suited to enterprise workflows.
- ✓Choose Nemotron 3 Ultra if you need strong reasoning on extended 1M-token inputs within the NVIDIA ecosystem.
Verdict
DeepSeek V4 Flash leads on measurable efficiency with a known intelligence index of 46.5, 103.73 t/s speed, and $0.18/1M pricing while offering a marginally larger 1,048,576-token context and open-weight access. Nemotron 3 Ultra matches the million-token context capability and emphasizes NVIDIA hardware optimization plus enterprise suitability, but lacks disclosed intelligence, speed, or cost metrics and carries a higher $2.5/1M price. DeepSeek V4 Flash wins on cost and transparency; Nemotron 3 Ultra is positioned for proprietary NVIDIA-centric deployments.
DeepSeek V4 Flash vs Nemotron 3 Ultra: side by side
| Spec | DeepSeek V4 Flash | Nemotron 3 Ultra | Winner |
|---|---|---|---|
| Intelligence | 46.5 | — | Tie |
| Output speed | 104 t/s | — | Tie |
| Output price | $0.18/1M | $2.50/1M | DeepSeek V4 Flash |
| Context | 1049K | 1000K | DeepSeek V4 Flash |
| Params | — | — | Tie |
| Type | Open-weight | Proprietary | Tie |
| Provider | DeepSeek | NVIDIA | Tie |
Detailed analysis
Pricing
Winner: DeepSeek V4 FlashDeepSeek V4 Flash is listed at $0.18 per million output tokens. Nemotron 3 Ultra is listed at $2.5 per million output tokens. The 14x price difference favors DeepSeek V4 Flash for cost-sensitive workloads.
Speed & Intelligence
Winner: DeepSeek V4 FlashDeepSeek V4 Flash provides concrete figures of 103.73 tokens per second and an intelligence index of 46.5. Nemotron 3 Ultra has no disclosed speed or intelligence metrics. Direct comparison on these axes is possible only for DeepSeek V4 Flash.
Context Handling
Winner: TieDeepSeek V4 Flash supports 1,048,576 tokens. Nemotron 3 Ultra supports 1,000,000 tokens. Both models are described as handling million-token contexts effectively with negligible practical difference.
Accessibility
Winner: DeepSeek V4 FlashDeepSeek V4 Flash is open-weight from DeepSeek. Nemotron 3 Ultra is proprietary from NVIDIA. Open-weight availability gives DeepSeek V4 Flash broader accessibility and customization options.
DeepSeek V4 Flash
Pros
- +Handles very large contexts effectively
- +Strong coding and STEM performance
- +Fast inference as a Flash variant
- +Cost-efficient for high-volume use
Cons
- –Text-only modality
- –May lag on nuanced creative tasks
- –Standard LLM hallucination risks
Nemotron 3 Ultra
Pros
- +Handles 1M-token contexts effectively
- +Strong reasoning on extended inputs
- +Optimized for NVIDIA hardware deployment
- +Suitable for enterprise workflows
Cons
- –Text-only modality
- –High compute needed for maximum context
- –Subject to typical LLM hallucinations
Summary: DeepSeek V4 Flash vs Nemotron 3 Ultra
DeepSeek V4 Flash is the stronger choice for users prioritizing low cost, measurable speed, open weights, and a known intelligence score. Nemotron 3 Ultra fits best when NVIDIA hardware optimization and enterprise-grade proprietary support are required. Both handle million-token contexts but differ sharply on price and transparency.
Frequently asked questions
DeepSeek V4 Flash at $0.18 per million output tokens versus Nemotron 3 Ultra at $2.5 per million output tokens.