# Qwen3.5-Flash

> Flash tier of Alibaba's Qwen3.5 series: a reasoning model that reads images, text and video.

## Key facts

- Model author: Qwen
- Input: $0.10 per 1M tokens
- Output: $0.40 per 1M tokens
- Cached input: $0.01 per 1M tokens
- Context window: 1,000,000 tokens
- Maximum output: 64,000 tokens
- Input modalities: image, text, video
- Output modalities: text
- Capabilities: reasoning, structured_output, tools, vision
- Model IDs: `qwen/qwen3.5-flash`
- Model page: https://www.realrelay.ai/model/qwen/qwen3.5-flash

## Overview

Qwen3.5-Flash is the Flash tier of Alibaba's Qwen3.5 series, a reasoning model that accepts image, text and video input and returns text. It supports tool calling and structured output, which makes it usable as the vision-capable step inside an agent.

It has a 1M-token context window and can generate up to 64,000 output tokens. It accepts text, image and video input and returns text.

## Capabilities

Qwen3.5-Flash supports tool calling, reasoning, structured output and vision. It accepts text, image and video input and returns text.

Alibaba documents function calling for the Qwen3.5 series, which lets the model act on image or video content, and structured output in non-thinking mode, for example valid JSON extracted from a photo of a product.

## Pricing

Qwen3.5-Flash costs $0.10 per 1M input tokens and $0.40 per 1M output tokens, with cache reads at $0.01 per 1M tokens. Qwen3.5-Flash is available through RealRelay's OpenAI-compatible API.

## Use cases

Use Qwen3.5-Flash to extract product details from photos into JSON, or to read screenshots and short video clips as part of an automated workflow.

Its 1M-token context window and 64,000-token output limit also suit long documents and transcripts, with tool calling to let an agent take action on what the model reads.

## Call it

OpenAI-compatible chat completions:

```bash
curl https://www.realrelay.ai/v1/chat/completions \
  -H "Authorization: Bearer $REALRELAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "qwen/qwen3.5-flash", "messages": [{"role": "user", "content": "Hello"}]}'
```

## FAQ

### What is Qwen3.5-Flash?

Qwen3.5-Flash is the Flash tier of Alibaba's Qwen3.5 series, a reasoning model that accepts image, text and video input and returns text.

### How much does Qwen3.5-Flash cost?

Qwen3.5-Flash costs $0.10 per 1M input tokens and $0.40 per 1M output tokens, with cache reads at $0.01 per 1M tokens.

### What is the context window of Qwen3.5-Flash?

Qwen3.5-Flash has a 1M-token context window and can generate up to 64,000 output tokens.

### What inputs and outputs does Qwen3.5-Flash support?

Qwen3.5-Flash accepts text, image and video input and returns text.

### Does Qwen3.5-Flash support tool calling?

Yes. Qwen3.5-Flash supports tool calling, reasoning, structured output and vision.

### How do I call Qwen3.5-Flash via the API?

Send requests to RealRelay's OpenAI-compatible API with the model ID qwen/qwen3.5-flash to use Qwen3.5-Flash.