Qwen3.5 Plus API

About Qwen3.5 Plus

Multimodal model with hybrid architecture for efficient deep thinking and visual understanding across text, image, and video on a 1M context.

Qwen3.5 Plus specs

Model ID

qwen3-5-plus

Provider

Alibaba Cloud

Category

Text Generation

Context window

1M tokens

Max output

65,536 tokens

Input

text, image, video

Output

text

Region

Singapore

Endpoints

POST /v1/chat/completions
POST /v1/responses
POST /v1/messages

Qwen3.5 Plus API pricingSave up to 10%

Live pay-as-you-go rates from the EmpirioLabs catalog. You are billed only for what you use, with no monthly minimum.

How to call the Qwen3.5 Plus API

Qwen3.5 Plus serves the OpenAI-compatible Chat Completions API. Point any OpenAI SDK at https://api.empiriolabs.ai/v1 with your EmpirioLabs API key and use the model id qwen3-5-plus. Get an API key from the EmpirioLabs dashboard.

curl https://api.empiriolabs.ai/v1/chat/completions \
  -H "Authorization: Bearer $EMPIRIOLABS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen3-5-plus",
    "messages": [
      {"role": "user", "content": "Write a haiku about the ocean."}
    ]
  }'

from openai import OpenAI

client = OpenAI(
    base_url="https://api.empiriolabs.ai/v1",
    api_key="YOUR_EMPIRIOLABS_API_KEY",
)

response = client.chat.completions.create(
    model="qwen3-5-plus",
    messages=[{"role": "user", "content": "Write a haiku about the ocean."}],
)
print(response.choices[0].message.content)

Qwen3.5 Plus API parameters

Request parameters supported by the Qwen3.5 Plus API on EmpirioLabs. Defaults apply when a field is omitted.

Good to know

Pricing is 3x for input/output above 256K tokens. Built-in tools (web search, web extractor, code interpreter, image search) billed only when invoked.

Text-to-Image Search and Image-to-Image Search use the Image Search pricing row. Each invoked image search is billed at that listed per-call rate.

Qwen3.5 Plus variants

Variants are alternate versions of Qwen3.5 Plus with their own model id. Depending on the variant, they can differ in serving region, pricing, or supported parameters; everything else works the same way.

Qwen3.5 Plus :variant1China1M contextSave up to 69%

Call it with the model id qwen3-5-plus:variant1.

Qwen3.5 Plus API: common questions

How much does the Qwen3.5 Plus API cost?

On EmpirioLabs, Qwen3.5 Plus is billed pay as you go: Input <=256K $0.36 (was $0.40); 256K-1M $1.08 (was $1.20) per 1M prompt tokens; Output <=256K $2.21 (was $2.40); 256K-1M $6.62 (was $7.20) per 1M generated tokens; Web Search $0.015 per call. The live rate card on this page always matches what the API charges.

What is the context window of Qwen3.5 Plus?

Qwen3.5 Plus supports a 1M-token context window with up to 65,536 output tokens per response.

Is the Qwen3.5 Plus API OpenAI-compatible?

Yes. Qwen3.5 Plus serves the OpenAI-compatible Chat Completions API, so existing OpenAI SDKs work by pointing base_url at https://api.empiriolabs.ai/v1 and setting the model id to qwen3-5-plus.

Which Qwen3.5 Plus variants are available?

Qwen3.5 Plus is available as 2 model ids: the default qwen3-5-plus plus qwen3-5-plus:variant1 (China). Variants can differ in serving region, pricing, or supported parameters; the rate cards for each are on this page.

Can I try Qwen3.5 Plus in the browser before integrating?

Yes. The EmpirioLabs playground runs Qwen3.5 Plus in the browser with the same parameters the API exposes, so you can test prompts before writing code.

How do I get a Qwen3.5 Plus API key?

Create an EmpirioLabs account, then generate a key under API Keys in the dashboard. Billing is pay-as-you-go credits, so you only pay for the requests you make.