---
title: uform-gen2-qwen-500m
description: UForm-Gen is a small generative vision-language model primarily designed for Image Captioning and Visual Question Answering. The model was pre-trained on the internal image captioning dataset and fine-tuned on public instructions datasets: SVIT, LVIS, VQAs datasets.
image: https://developers.cloudflare.com/dev-products-preview.png
---

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#  uform-gen2-qwen-500m Beta 

Image-to-Text • Unum 

`@cf/unum/uform-gen2-qwen-500m` 

UForm-Gen is a small generative vision-language model primarily designed for Image Captioning and Visual Question Answering. The model was pre-trained on the internal image captioning dataset and fine-tuned on public instructions datasets: SVIT, LVIS, VQAs datasets.

| Model Info       |                                   |
| ---------------- | --------------------------------- |
| Deprecated       | 5/30/2026                         |
| More information | [link ↗](https://www.unum.cloud/) |
| Beta             | Yes                               |

## Usage

TypeScript

```
export interface Env {  AI: Ai;}

export default {  async fetch(request: Request, env: Env): Promise<Response> {    const res = await fetch("https://cataas.com/cat");    const blob = await res.arrayBuffer();    const input = {      image: [...new Uint8Array(blob)],      prompt: "Generate a caption for this image",      max_tokens: 512,    };    const response = await env.AI.run(      "@cf/unum/uform-gen2-qwen-500m",      input      );    return new Response(JSON.stringify(response));  },} satisfies ExportedHandler<Env>;
```

## Parameters

* [ Input ](#tab-panel-5304)
* [ Output ](#tab-panel-5305)

Option 1

stringformat: binary

Binary string representing the image contents.

▶Option 2{}

object

description

`string`

## API Schemas (Raw)

Input [ ](https://developers.cloudflare.com/workers-ai/models/uform-gen2-qwen-500m/schema-input.json "Open") [ ](https://developers.cloudflare.com/workers-ai/models/uform-gen2-qwen-500m/schema-input.json "Download") 

Output [ ](https://developers.cloudflare.com/workers-ai/models/uform-gen2-qwen-500m/schema-output.json "Open") [ ](https://developers.cloudflare.com/workers-ai/models/uform-gen2-qwen-500m/schema-output.json "Download")

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```