Data points: 76
The readout for DeepSeek V4 Flash and Nemotron 3 Ultra, before the detailed comparison sheet.
Decision read
DeepSeek V4 Flash
DeepSeek V4 Flash currently has the stronger profile, with verified wins split 4 to 0.
Evidence depth
76 data points
Includes 6 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with DeepSeek V4 Flash
The charts below split 14 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
Model compare DeepSeek V4 Flash vs Nemotron 3 Ultradeepseek-v4-flash-vs-nemotron-3-ultra-550b-a55b | Model A DeepSeek V4 Flash | Model B Nemotron 3 Ultra |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 4 wins | 0 wins |
| Where it leads | Cheapest input price, Free providers, Provider coverage, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
DeepSeek V4 Flash
71.3
Avg. score
Nemotron 3 Ultra
48.3
Selected category
Coding
DeepSeek V4 Flash leads by 23.3
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
DeepSeek V4 Flash
winner$0.280/M
Rank #6/138 · confidence 4
Nemotron 3 Ultra
$2.67/M
Rank #69/138 · confidence 4
DeepSeek V4 Flash
winner$0.175/M
Rank #11/138 · confidence 4
Nemotron 3 Ultra
$1.18/M
Rank #73/138 · confidence 4
DeepSeek V4 Flash
winner$0.140/M
Rank #17/138 · confidence 4
Nemotron 3 Ultra
$0.675/M
Rank #76/138 · confidence 4
DeepSeek V4 Flash
winner27.8%
Rank #21/150 · confidence 4
Nemotron 3 Ultra
26.6%
Rank #24/150 · confidence 4
DeepSeek V4 Flash
86.7%
Rank #22/152 · confidence 4
Nemotron 3 Ultra
86.7%
Rank #22/152 · confidence 4
DeepSeek V4 Flash
winner42.0%
Rank #37/149 · confidence 4
Nemotron 3 Ultra
39.9%
Rank #53/149 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | DeepSeek V4 Flash | Nemotron 3 Ultra |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | DeepSeek V4 Flash | Nemotron 3 Ultra |
|---|---|---|
20 tests | DeepSeek V4 Flash speed / latency 83 tok/s / 5114ms input / output No data |
This report only uses LMSpeed data for DeepSeek V4 Flash and Nemotron 3 Ultra: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | DeepSeek V4 Flash | Nemotron 3 Ultra |
|---|---|---|
| When to choose each model | DeepSeek V4 Flash DeepSeek V4 Flash is stronger when you prioritize Cheapest input price, Free providers, Provider coverage, Recent tests. | Nemotron 3 Ultra Nemotron 3 Ultra does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. |
TL;DR: DeepSeek V4 Flash leads across 76 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from DeepSeek V4 Flash vs Nemotron 3 Ultra into nearby model comparisons with enough verified LMSpeed data.
| No data |
| Model metadata | DeepSeek V4 Flash exposes 1.0M tokens; notable signals: Text input, Text output, Tool calling, Structured outputs. | Nemotron 3 Ultra exposes 1M tokens; notable signals: Text input, Text output, Tool calling, Structured outputs. |
|---|---|---|
| Developer | DeepSeek | NVIDIA |
| Context window | 1.0M tokens | 1M tokens |
| Max output | 65.5K tokens | 16.4K tokens |
| Released | Apr 2026 | No data |
| Modalities | Input Text Output Text | Input Text Output Text |
| Features | Text inputText outputTool callingStructured outputsJSON modeReasoning | Text inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | 550B / 55B active |
| Tokenizer | DeepSeek | Other |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | deepseek/deepseek-v4-flash | nvidia/nemotron-3-ultra-550b-a55b |
| References | No data | No data |
Nemotron 3 Ultra
speed / latency
N/A / N/A
input / output
No data
ChooseC API5 tests | DeepSeek V4 Flash speed / latency 56 tok/s / 3926ms input / output No data | Nemotron 3 Ultra speed / latency N/A / N/A input / output No data |
|---|
352287 API0 tests | DeepSeek V4 Flash speed / latency N/A / N/A input / output No data | Nemotron 3 Ultra speed / latency N/A / N/A input / output No data |
|---|
6345ywz API0 tests | DeepSeek V4 Flash deepseek-ai/DeepSeek-V4-Flash speed / latency N/A / N/A input / output $0.137/M / $0.411/M | Nemotron 3 Ultra nvidia/nemotron-3-ultra-550b-a55b speed / latency N/A / N/A input / output $10.27/M / $10.27/M |
|---|
Astrdark0 tests | DeepSeek V4 Flash speed / latency N/A / N/A input / output No data | Nemotron 3 Ultra speed / latency N/A / N/A input / output No data |
|---|
DeepSeek V4 Flash deepseek-v4-flash-free speed / latency No data input / output $0/M / $0/M | Nemotron 3 Ultra nemotron-3-ultra-550b-a55b speed / latency No data input / output $1.00/M / $1.00/M |
DeepSeek V4 Flash deepseek-v4-flash-free speed / latency No data input / output $0.0025/M / $0.0084/M | Nemotron 3 Ultra nvidia/nemotron-3-ultra-550b-a55b speed / latency No data input / output $0.500/M / $2.20/M |
DeepSeek V4 Flash deepseek-v4-flash speed / latency No data input / output $0.050/M / $0.050/M | Nemotron 3 Ultra nemotron-3-ultra-550b-a55b speed / latency No data input / output $75.00/M / $75.00/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
