Model overview
> [!WARNING] > **Preview release — still under active testing.** VieNeu-TTS v3 Nano is an experimental, lightweight model. It has known shortcomings (see *Limitations* below), its quality is **noticeably lower than v3 Turbo**, and weights, voices and the API may still change between revisions. **VieNeu-TTS v3 Turbo remains the default and recommended model.** Reach for Nano only when Turbo is too slow on your hardware or when you are deploying on a phone / edge device. **VieNeu-TTS v3 Nano** is a **48M-parameter flow-matching TTS model** for Vietnamese, built for **edge devices and weak CPUs**: old laptops, mini PCs, ARM single-board computers and Android phones. It ships as a handful of small **ONNX** graphs (≈280 MB at runtime), runs **torch-free on ONNX Runtime**, loads in about 3 seconds and synthesizes at roughly **3× the speed of v3 Turbo** on the same CPU. It is a different architecture from v3 Turbo (a non-autoregressive flow model instead of an LLM-style autoregressive backbone), which is where the speed comes from — and also where the quality gap comes from. It supports **6 built-in preset voices**, inline **emotion cues** (`[cười]`, `[thở dài]`, `[hắng giọng]`) and outputs **24 kHz** audio.
Key features
特点摘要待依据来源补齐，不凭模型名称推断能力。
Limitations & considerations
Sources are insufficient to establish specific limitations. Verify task performance, latency, data policies, licensing and version lifecycle.
Source prices & cost analysis
Prices vary by channel, region and configuration. Channel quotes are listed independently and are not treated as a single official provider price.
| Source / channel | Input | Output | Billing unit | Collected at |
|---|---|---|---|---|
| No verified prices yet. Check the source channel. | ||||
Estimate monthly base token costs
Estimates exclude cache discounts, tiered pricing, multimodal surcharges, web search, taxes and additional reasoning output.
Public benchmarks & run configuration
暂无已采集的可核验公开评分。模型未上榜不代表能力较低。
View full indexed rankings →Frequently asked questions
Do open weights permit free commercial use?
Not necessarily. Check the version license, commercial conditions and usage policies. Self-hosting incurs compute and maintenance costs.
Are these real-time billing prices?
These are timestamped source snapshots, not live billing prices. Check the channel for current versions, regions, discounts and billing methods.
Sources & traceability
许可证：apache-2.0。模型介绍与第三方评测均以原来源的具体版本和方法为准。