---
title: Qwen3.8-Flash-Next Demo
emoji: ⚡
colorFrom: indigo
colorTo: blue
sdk: gradio
sdk_version: 6.26.0
app_file: app.py
short_description: Private-key chat demo for Qwen3.8 Flash Next
python_version: "3.12"
---

# Qwen3.8-Flash-Next Demo

A streaming text-and-image chat demo for [`Qwen/Qwen3.8-Flash-Next`](https://huggingface.co/Qwen/Qwen3.8-Flash-Next). The 125B-parameter checkpoint is called through an OpenAI-compatible inference endpoint, so this Space does not download or expose model weights or API credentials.

> **Availability notice:** The model weights are openly available, but this Space cannot provide free public inference for this very large model. To run the chat, its owner must configure an OpenAI-compatible endpoint and API key, or host the model on suitable hardware. The Space does not collect visitor API keys.

## Configuration

In the Space **Settings → Variables and secrets**, create these secrets:

| Secret | Required | Value |
| --- | --- | --- |
| `OPENAI_API_KEY` | Yes | API key for the inference endpoint |
| `OPENAI_BASE_URL` | Yes | OpenAI-compatible API base URL, including `/v1` |

Optional public variable:

| Variable | Default | Purpose |
| --- | --- | --- |
| `MODEL_ID` | `Qwen/Qwen3.8-Flash-Next` | Model identifier accepted by the chosen endpoint |

For QwenCloud, obtain the regional API host from its API-key page and use its OpenAI-compatible `/compatible-mode/v1` endpoint. Confirm that the endpoint serves the exact preview model identifier; QwenCloud may use a commercial model alias instead.

## Publish with the Hugging Face CLI

```powershell
# Authenticate once in an interactive terminal.
hf auth login

# Replace YOUR_USERNAME with your Hugging Face namespace.
hf repos create YOUR_USERNAME/qwen3-8-flash-next-demo --type space --space-sdk gradio --flavor zero-a10g --public

# Explicit paths avoid a Windows CLI path-normalisation issue.
hf upload YOUR_USERNAME/qwen3-8-flash-next-demo app.py app.py --repo-type space
hf upload YOUR_USERNAME/qwen3-8-flash-next-demo requirements.txt requirements.txt --repo-type space
hf upload YOUR_USERNAME/qwen3-8-flash-next-demo .gitignore .gitignore --repo-type space
hf upload YOUR_USERNAME/qwen3-8-flash-next-demo README.md README.md --repo-type space
```

Then add the two secrets in the Space settings before making a request. Never commit an API key to this repository.

## Behaviour

- Supports a text prompt and one optional image (max 10 MB).
- Streams the model's final response to the chat.
- Lets visitors choose Qwen thinking mode and effort while withholding internal reasoning traces from the interface.
- Enables the Gradio MCP server on launch.