Hy4 preview
Summary
Hy4 preview is an open-weight language model from Tencent (Hunyuan), released on 28 Aug 2026. It accepts text and generates text, with a 1M-token context window and up to 64K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.75 per million input tokens and $2.25 per million output tokens (OpenRouter), across 4 providers we track.
A next-generation productivity model with significantly enhanced Agent and complex task execution capabilities.
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Tencent (Hunyuan) |
|---|---|
| Release date | 28 Aug 2026 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Open weights [Hugging Face] |
| License | apache-2.0 [Hugging Face] |
| Parameters | 780B [Hugging Face] |
| Context window | 1M (1,048,576 tokens) [models.dev] |
| Max output | 64K tokens [models.dev] |
| Input | Text [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
| Hugging Face | tencent/Hy4-preview [Hugging Face] |
Hy4 preview API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenRouter tencent/hy4-preview | $0.75 | $2.25 | $0.04 | 1M | OpenRouter, 4 Oct 2026 |
| DeepInfra tencent/Hy4-preview | $0.83 | $2.50 | $0.04 | 1M | models.dev, 4 Oct 2026 |
| Hugging Face Inference Providers tencent/Hy4-preview | $0.83 | $2.50 | – | 1M | models.dev, 4 Oct 2026 |
| Vercel AI Gateway tencent/hy4-preview | $0.83 | $2.50 | $0.04 | 1M | models.dev, 4 Oct 2026 |
Frequently asked questions
What is the context window of Hy4 preview?
Hy4 preview has a context window of 1,048,576 tokens (1M) and can generate up to 64,000 tokens in a single response, according to models.dev.
How much does the Hy4 preview API cost?
Hy4 preview is listed from $0.75 per million input tokens and $2.25 per million output tokens (OpenRouter). Prices last verified 4 Oct 2026.
Is Hy4 preview open source?
Hy4 preview is an open-weight model: its weights are published on Hugging Face as tencent/Hy4-preview under the apache-2.0 license. Check the license terms before commercial use.
When was Hy4 preview released?
Tencent (Hunyuan) released Hy4 preview on 28 Aug 2026, according to models.dev.
Which providers offer Hy4 preview?
We track Hy4 preview on 4 providers: OpenRouter, DeepInfra, Hugging Face Inference Providers, Vercel AI Gateway.
Change history
- OpenRouter price changed: input $0.83 → $0.75, output $2.50 → $2.25 per 1M tokens
Sources
- https://openrouter.ai/tencent/hy4-preview
- https://github.com/sst/models.dev/blob/dev/providers/deepinfra/models/tencent/Hy4-preview.toml
- https://huggingface.co/tencent/Hy4-preview
- https://github.com/sst/models.dev/blob/dev/providers/huggingface/models/tencent/Hy4-preview.toml
- https://github.com/sst/models.dev/blob/dev/providers/vercel/models/tencent/hy4-preview.toml