Hunyuan Hy3 Preview vs Nemotron 3 Nano
Hunyuan Hy3 Preview (2026) and Nemotron 3 Nano (2025) are frontier reasoning models from Tencent AI Lab and NVIDIA AI. Hunyuan Hy3 Preview ships a 262k-token context window, while Nemotron 3 Nano ships a 256k-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.
Hunyuan Hy3 Preview is safer overall; choose Nemotron 3 Nano when provider fit matters.
Decision scorecard
Local evidence first| Signal | Hunyuan Hy3 Preview | Nemotron 3 Nano |
|---|---|---|
| Best for | reasoning-heavy apps, tool-calling agents, and provider-routed production | tool-calling agents |
| Decision fit | Coding, RAG, and Agents | RAG, Agents, and Long context |
| Context window | 262k | 256k |
| Cheapest output | $0.26/1M tokens | - |
| Provider routes | 2 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Hunyuan Hy3 Preview has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Hunyuan Hy3 Preview has broader tracked provider coverage for fallback and procurement flexibility.
- Hunyuan Hy3 Preview uniquely exposes Reasoning in local model data.
- Local decision data tags Hunyuan Hy3 Preview for Coding, RAG, and Agents.
- Local decision data tags Nemotron 3 Nano for RAG, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Hunyuan Hy3 Preview
$118
Cheapest tracked route/tier: OpenRouter
Nemotron 3 Nano
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Hunyuan Hy3 Preview and Nemotron 3 Nano; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Reasoning before moving production traffic.
- No overlapping tracked provider route is sourced for Nemotron 3 Nano and Hunyuan Hy3 Preview; plan for SDK, billing, or endpoint changes.
- Hunyuan Hy3 Preview adds Reasoning in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-22 | 2025-12-15 |
| Context window | 262k | 256k |
| Parameters | 295B | 3.97B |
| Architecture | Dense + MoE Hybrid | Mixture of Experts |
| License | Tencent Hunyuan Community License | NVIDIA Open Model |
| Openness | Open weights | Open weights |
| Commercial use | Commercial use: conditional | Commercial use: permitted |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Hunyuan Hy3 Preview | Nemotron 3 Nano |
|---|---|---|
| Input price | $0.07/1M tokens | - |
| Output price | $0.26/1M tokens | - |
| Providers |
Capabilities
| Capability | Hunyuan Hy3 Preview | Nemotron 3 Nano |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | Yes | No |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | No | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Deep dive
The capability footprint differs most on reasoning mode: Hunyuan Hy3 Preview. Both models share function calling and tool use, 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: Hunyuan Hy3 Preview has $0.07/1M input tokens and Nemotron 3 Nano has no token price sourced yet. Provider availability is 2 tracked routes versus 1. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Hunyuan Hy3 Preview when reasoning depth, larger context windows, and broader provider choice are central to the workload. Choose Nemotron 3 Nano when provider fit 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
Which has a larger context window, Hunyuan Hy3 Preview or Nemotron 3 Nano?
Hunyuan Hy3 Preview supports 262k tokens, while Nemotron 3 Nano supports 256k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Hunyuan Hy3 Preview or Nemotron 3 Nano open source?
Hunyuan Hy3 Preview is listed under Tencent Hunyuan Community License. Nemotron 3 Nano 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 reasoning mode, Hunyuan Hy3 Preview or Nemotron 3 Nano?
Hunyuan Hy3 Preview has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for function calling, Hunyuan Hy3 Preview or Nemotron 3 Nano?
Both Hunyuan Hy3 Preview and Nemotron 3 Nano expose function calling. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Which is better for tool use, Hunyuan Hy3 Preview or Nemotron 3 Nano?
Both Hunyuan Hy3 Preview and Nemotron 3 Nano expose tool use. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Where can I run Hunyuan Hy3 Preview and Nemotron 3 Nano?
Hunyuan Hy3 Preview is available on OpenRouter and Tencent Cloud TI Platform. Nemotron 3 Nano is available on NVIDIA NIM. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.