Nemotron 3 VoiceChat vs Nemotron 4 340B
Nemotron 3 VoiceChat (2026) and Nemotron 4 340B (2025) are compact production models from NVIDIA AI. Nemotron 3 VoiceChat ships a not-yet-sourced context window, while Nemotron 4 340B ships a 4k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads. It focuses on practical selection signals rather than broad model-family marketing.
Nemotron 3 VoiceChat is safer overall; choose Nemotron 4 340B when provider fit matters.
Decision scorecard
Local evidence first| Signal | Nemotron 3 VoiceChat | Nemotron 4 340B |
|---|---|---|
| Best for | multimodal apps | provider-routed production |
| Decision fit | Vision | Classification and JSON / Tool use |
| Context window | — | 4k |
| Cheapest output | - | $4.20/1M tokens |
| Provider routes | 0 tracked | 2 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Nemotron 3 VoiceChat uniquely exposes Vision and Multimodal in local model data.
- Local decision data tags Nemotron 3 VoiceChat for Vision.
- Nemotron 4 340B has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Nemotron 4 340B has broader tracked provider coverage for fallback and procurement flexibility.
- Nemotron 4 340B uniquely exposes Structured outputs in local model data.
- Local decision data tags Nemotron 4 340B for Classification and JSON / Tool use.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Nemotron 3 VoiceChat
Unavailable
No complete token price in local provider data
Nemotron 4 340B
$4,410
Cheapest tracked route/tier: DeepInfra
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Nemotron 3 VoiceChat and Nemotron 4 340B; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision and Multimodal before moving production traffic.
- Nemotron 4 340B adds Structured outputs in local capability data.
- No overlapping tracked provider route is sourced for Nemotron 4 340B and Nemotron 3 VoiceChat; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Structured outputs before moving production traffic.
- Nemotron 3 VoiceChat adds Vision and Multimodal in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-03-16 | 2025-02-27 |
| Context window | — | 4k |
| Parameters | 12B | 340B |
| Architecture | decoder only | decoder only |
| License | NVIDIA Open Model | NVIDIA Open Model |
| Openness | Open weights | Open weights |
| Commercial use | Commercial use allowed | Commercial use allowed |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Nemotron 3 VoiceChat | Nemotron 4 340B |
|---|---|---|
| Input price | - | $4.20/1M tokens |
| Output price | - | $4.20/1M tokens |
| Providers | - |
Capabilities
| Capability | Nemotron 3 VoiceChat | Nemotron 4 340B |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | No | No |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | No | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: Nemotron 3 VoiceChat, multimodal input: Nemotron 3 VoiceChat, and structured outputs: Nemotron 4 340B. Both models share the core language-model surface, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
Pricing coverage is uneven: Nemotron 3 VoiceChat has no token price sourced yet and Nemotron 4 340B has $4.20/1M input tokens. Provider availability is 0 tracked routes versus 2. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Nemotron 3 VoiceChat when vision-heavy evaluation are central to the workload. Choose Nemotron 4 340B when provider fit and broader provider choice are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency. For teams standardizing a stack, that distinction is often the difference between a benchmark win and a reliable deployment.
FAQ
Is Nemotron 3 VoiceChat or Nemotron 4 340B open source?
Nemotron 3 VoiceChat is listed under NVIDIA Open Model. Nemotron 4 340B is listed under NVIDIA Open Model. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, Nemotron 3 VoiceChat or Nemotron 4 340B?
Nemotron 3 VoiceChat has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for multimodal input, Nemotron 3 VoiceChat or Nemotron 4 340B?
Nemotron 3 VoiceChat has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for structured outputs, Nemotron 3 VoiceChat or Nemotron 4 340B?
Nemotron 4 340B has the clearer documented structured outputs signal in this comparison. If structured outputs is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Nemotron 3 VoiceChat and Nemotron 4 340B?
Nemotron 3 VoiceChat is available on the tracked providers still being sourced. Nemotron 4 340B is available on NVIDIA NIM and DeepInfra. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
When should I pick Nemotron 3 VoiceChat over Nemotron 4 340B?
Nemotron 3 VoiceChat is safer overall; choose Nemotron 4 340B when provider fit matters. If your workload also depends on vision-heavy evaluation, start with Nemotron 3 VoiceChat; if it depends on provider fit, run the same evaluation with Nemotron 4 340B.
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Last reviewed: 2026-05-19. Data sourced from public model cards and provider documentation.