Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | DeepSeek V4 Flash (Non-reasoning) | Nemotron 3.5 Lightning |
|---|---|---|
| Input ($/M tokens) | $0.09 | $0.06 |
| Output ($/M tokens) | $0.2 | $0.2 |
Verdict. DeepSeek V4 Flash (Non-reasoning) and Nemotron 3.5 Lightning split the benchmark comparison evenly at 1–1. The tiebreaker here is price, speed, and what you actually run them on.
Pricing. Both models sit in the budget bracket for output-token pricing. At 1.0× the per-million-token cost, Nemotron 3.5 Lightning is meaningfully cheaper if your traffic is output-heavy (long completions, document generation, agent loops). Nemotron 3.5 Lightning makes more sense when output volume is low and absolute reasoning quality justifies the premium.
Strengths. DeepSeek V4 Flash (Non-reasoning) is strongest on Intelligence Index (18.9). Nemotron 3.5 Lightning leads on Coding Index (26.8), Intelligence Index (13.6).
Speed. Speed data is incomplete for this pair; benchmark and price should decide.
Provider. DeepSeek and NVIDIA sell to overlapping but distinct developer audiences: DeepSeek tends to ship frontier reasoning models with premium positioning, while NVIDIA often prices more aggressively. Your existing vendor relationships, billing, and SLA preferences may matter as much as the raw numbers above.
Workload cost. Workload scenarios (per million requests at 30M input + 15M output tokens): DeepSeek V4 Flash (Non-reasoning) costs $5.70 ($68/year); Nemotron 3.5 Lightning costs $4.80 ($58/year). At a smaller 5M-input/2M-output scale (single-developer tool or prototype): DeepSeek V4 Flash (Non-reasoning) ≈ $0.85/run, Nemotron 3.5 Lightning ≈ $0.70/run. At agent/realtime scale (200M input / 100M output per million requests): DeepSeek V4 Flash (Non-reasoning) ≈ $38/run, Nemotron 3.5 Lightning ≈ $32/run. Nemotron 3.5 Lightning becomes more attractive at higher volume — the absolute per-token pricing difference compounds when you ship at scale.
Recommendation. Both models have legitimate use cases — the right answer depends on whether you are optimizing for benchmark ceiling, latency, or unit cost. Start with the cheaper / faster model, evaluate against your specific task, and only switch if the upgrade shows a meaningful lift.
Head-to-head deltas
Data from Artificial Analysis API — 12 benchmarks
Nemotron 3.5 Lightning is cheaper overall. Its blended price (3:1 input/output ratio) is $0.10/M tokens vs $0.12/M for DeepSeek V4 Flash (Non-reasoning).
It's a tie — both models win 1 benchmarks each across 12 evaluated categories. See the detailed benchmark chart above for per-category results.
Nemotron 3.5 Lightning generates tokens faster at 302 tok/s vs — tok/s. However, Nemotron 3.5 Lightning has lower time-to-first-token (0.57s vs —s).
Choose based on your priorities: Nemotron 3.5 Lightning for lower cost, both perform similarly on benchmarks, and Nemotron 3.5 Lightning for faster generation. For latency-sensitive apps, check the TTFT comparison above.