Qwen3.6 Flash

qwen3.6-flash

Qwen3.6 native vision-language Flash model is built on a hybrid architecture that combines linear attention mechanism with sparse mixture-of-experts model to achieve higher inference efficiency. Compared to the 3 series, these models achieve a performance leap in pure-text and multimodal tasks, providing fast response times while balancing inference speed and overall performance.

Context window1.0M

Provider通义千问

Released2026/04/22

Playground

Pricing

The same model is available through multiple service channels — choose based on latency, reliability and cost.

Prices in $ / 1M tokens

To pick a channel, add a provider field to the request body, for example "provider": { "channel": "direct" }. Valid values are direct / stable / economical; omit it to use the default channel.

Direct

Direct upstream connection — best when you need native behavior and the full context window.

Input context	Input	Output
≤ 128K	0.18/M	1.06/M
> 128K	0.71/M	4.24/M

Overview

Input

Text Image

Output

Text

Qwen3.6 Flash API: Native Vision-Language High-Speed Lightweight Model

Qwen3.6 Flash is a native vision-language model built on a hybrid architecture that combines linear attention mechanisms with a sparse mixture-of-experts model to achieve higher inference efficiency. Compared with the 3 series, the Qwen3.6 series delivers a significant performance leap on both text-only and multimodal tasks, and the Flash tier builds on this to provide fast responses, balancing inference speed with overall performance.

It is positioned for high-frequency, low-latency production traffic: real-time conversation, content classification, information extraction, and image annotation. Its 1 million token context window also gives it strong cost-effectiveness in scenarios such as long-document preprocessing.

SeaWhale AI provides Qwen3.6 Flash through an OpenAI-compatible interface, supporting multimodal input, tool calling, and streaming output.

Get API Key · Model ID: qwen3.6-flash

Why Choose Qwen3.6 Flash

Native vision-language model — multimodal capability is natively designed, not bolted on later
Efficiency advantages of hybrid architecture — linear attention + sparse MoE for high inference efficiency
1 million token context — the lightweight tier also supports ultra-long inputs
Fast response — designed for latency-sensitive, high-frequency scenarios
Performance leap over the 3 series — clear improvements on both text-only and multimodal tasks

Core Capabilities

01 High-Frequency Conversation and Real-Time Response

The core value of the Flash tier is speed. In scenarios where users directly perceive latency—such as customer service, assistants, and chatbots—response speed often matters more than a few extra percentage points of accuracy.

Real-time conversation and multi-turn interaction
Low-latency user experience
High-concurrency capacity

02 Image Understanding and Annotation

As a native vision-language model, Flash offers outstanding cost-effectiveness on high-frequency vision tasks such as image classification, annotation, and content recognition.

Image classification and tagging
Content moderation and compliance checking
Product image and asset recognition

03 Information Extraction and Structuring

Extracting fields from unstructured text or images and outputting structured results is one of the batch tasks Flash is best suited for.

Field extraction from forms, receipts, and documents
Structured JSON output
Data cleaning and normalization

04 Long-Document Preprocessing

The 1 million token context allows Flash to handle the first pass over long documents: summarization, segmentation, and key point extraction, then pass the refined content to a stronger model.

Long-document summarization and segmentation
Key point extraction and index building
Preprocessing layer for RAG pipelines

Best Use Cases

Scenario	Description
Real-time conversation	Latency-sensitive customer service and assistant products
Image annotation	High-frequency image classification and content recognition
Information extraction	Field extraction from text and images
Content moderation	Large-scale compliance and quality inspection
Long-document preprocessing	Summarization, segmentation, key point extraction
Batch processing pipelines	Cleaning and transformation of large-scale corpora

Differences Between Qwen3.6 Flash and Plus, Max

Capability	Qwen3.6 Flash	Qwen3.6 Plus	Qwen3.6 Max Preview
Model ID	`qwen3.6-flash`	`qwen3.6-plus`	`qwen3.6-max-preview`
Positioning	Speed-first	Balanced workhorse	Series flagship
Context window	1 million tokens	1 million tokens	1 million tokens
Max output	65.5K tokens	65.5K tokens	65.5K tokens
Input modalities	Text, image	Text, image	Text, image
Best for	High-frequency lightweight tasks	Daily development and production deployment	3D, gaming, and repository-scale problems

For specific billing, refer to the real-time price card at the top of the page.

How to Use the Qwen3.6 Flash API

1. Create a SeaWhale AI API Key Generate a key in the console and top up your balance.

2. Write deterministic prompts Flash prioritizes speed. The more specific the prompt and the clearer the output format constraints, the more stable the result. Avoid asking it to do open-ended reasoning.

3. Call the API

curl -X POST https://api.seawhaleai.com/v1/chat/completions \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "qwen3.6-flash",
    "messages": [{
      "role": "user",
      "content": [
        {"type": "image_url", "image_url": {"url": "https://example.com/receipt.jpg"}},
        {"type": "text", "text": "Extract the title, amount, and date from this invoice and output JSON."}
      ]
    }]
  }'

FAQ

Is Flash capable enough? It is more than sufficient for classification, extraction, annotation, and simple conversation. For multi-step planning and deep reasoning, please upgrade to Plus or Max.

What does "native vision-language model" mean? It means the multimodal capability is natively designed at the model architecture level, rather than attaching a vision encoder to a text model. Native design generally performs better on image-text associative reasoning.

How large is the context window? 1 million tokens, making it one of the most generous context options in the lightweight tier.

What has been improved compared to the Qwen3 series? Both text-only and multimodal tasks have achieved a performance leap, while the hybrid architecture brings higher inference efficiency.

Is it suitable for batch processing? Very suitable. High throughput and low unit price are Flash's core advantages, making it the most cost-effective choice for large-scale offline tasks.

Does it support tool calling? Yes. Function calling, streaming output, and image input are all supported.

Why Choose SeaWhale AI for the Qwen3.6 Flash API

No Alibaba Cloud account required — call directly with one API key
OpenAI-compatible interface — integrate with two lines of changes to existing code
Friendly to layered routing — shares the same key with Plus / Max, switch by task complexity
Settled in RMB — domestic models are priced in RMB

API

API integration

Model IDUse this value as the model in inference requests

qwen3.6-flash

API KeyBearer token used to authenticate inference requests

Manage API keys

Base URLOpenAI compatible · /chat/completions

https://api.seawhaleai.com/v2/

provider OptionalSelects a service channel; omit it and the system picks the default

"provider": { "channel": "direct" }

qwen3.6-flash usage examples

SeaWhale AI is compatible with the OpenAI API protocol, so you can call it with the OpenAI SDK or plain HTTP requests. Streaming is enabled by default.

About the provider parameter (optional, a SeaWhale AI extension): most models are served over several channels that differ slightly in price and reliability. Add a provider field to the request body to pick one; omit it and the system selects the default channel — normal calls are unaffected.

provider is not part of the official OpenAI protocol — it is a SeaWhale AI extension that only takes effect on this platform. The OpenAI SDK allows custom fields like this to pass through; see the examples below.

Value	Channel	Best for
`direct`	Direct	The official upstream link, for native behavior and the full context window
`stable`	Preferred	Balanced availability and speed — a good default for production traffic
`economical`	Economy	Cost first, well suited to batch processing and price-sensitive workloads

Available channels and their prices are listed under "Pricing" above (channels vary by model). Additional notes:

Syntax: "provider": { "channel": "direct" }.
If the requested channel is not enabled for that model, the request automatically falls back to the default channel and returns normally — it does not error.
With the official SDKs: in Python pass it via extra_body; in Node.js put it directly on the request object and it passes through. In TypeScript projects, add a // @ts-expect-error line to skip the type check.

cURLPythonNode.js

curl https://api.seawhaleai.com/v2/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer <API_KEY>" \
  -d '{
    "model": "qwen3.6-flash",
    "messages": [
      {"role": "system", "content": "You are a helpful assistant."},
      {"role": "user", "content": "Hello!"}
    ],
    "provider": { "channel": "direct" },
    "stream": true
  }'
# provider is optional — remove this line to use the default channel

from openai import OpenAI

client = OpenAI(
    base_url="https://api.seawhaleai.com/v2",
    api_key="<API_KEY>",
)

stream = client.chat.completions.create(
    model="qwen3.6-flash",
    messages=[
        {"role": "system", "content": "You are a helpful assistant."},
        {"role": "user", "content": "Hello!"},
    ],
    stream=True,
    # Optional: pick a service channel; omit to use the default
    extra_body={"provider": {"channel": "direct"}},
)

for chunk in stream:
    if chunk.choices[0].delta.content:
        print(chunk.choices[0].delta.content, end="", flush=True)

import OpenAI from 'openai'

const client = new OpenAI({
  baseURL: 'https://api.seawhaleai.com/v2',
  apiKey: '<API_KEY>',
})

const stream = await client.chat.completions.create({
  model: 'qwen3.6-flash',
  messages: [
    { role: 'system', content: 'You are a helpful assistant.' },
    { role: 'user', content: 'Hello!' },
  ],
  stream: true,
  // Optional: pick a service channel; omit to use the default
  // @ts-expect-error provider is a SeaWhale AI extension, not in the OpenAI SDK types
  provider: { channel: 'direct' },
})

for await (const chunk of stream) {
  process.stdout.write(chunk.choices[0]?.delta?.content ?? '')
}