Qwen3.5 Plus API

alibaba/qwen3.5-plus
The combination of long context, native vision, and agentic reasoning makes Qwen3.5 Plus particularly well-suited for the following real-world deployment scenarios.
Context
1M tokens
Input
$0.52 / 1M tokens
Output
$3.12 / 1M tokens
Released
Feb 20, 2026

How to use Qwen3.5 Plus API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to alibaba/qwen3.5-plus.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "alibaba/qwen3.5-plus",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ]
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "alibaba/qwen3.5-plus",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ]
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"alibaba/qwen3.5-plus","messages":[{"role":"user","content":"Hello!"}]}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Qwen3.5 Plus API Pricing

TypePrice
Input
$0.52 / 1M tokens
Output
$3.12 / 1M tokens

Qwen3.5 Plus vs other models

ModelInputOutputContextBest for
Qwen3.5 Plus
This page
$0.52 / 1M tokens
$3.12 / 1M tokens
1M tokens
Coding + agents
$6.5 / 1M tokens
$39 / 1M tokens
1.05M tokens
Reasoning + agents
$2.6 / 1M tokens
$13 / 1M tokens
1M tokens
Balanced coding + agents
$3.9 / 1M tokens
$19.5 / 1M tokens
1M tokens
Long-context, multimodal & agentic workflows
$0.65 / 1M tokens
$3.9 / 1M tokens
1.05M tokens
Reasoning + agents

Frequently asked questions

Qwen3.5 Plus has a 1,000,000 tokens context window and can return up to 65,536 tokens.

Qwen3.5 Plus takes text as input and returns text.

Use alibaba/qwen3.5-plus as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.

Qwen3.5 Plus became available on February 20, 2026.

Qwen3.5 Plus is priced at input $0.52 / 1M tokens, output $3.12 / 1M tokens.

Yes, Qwen3.5 Plus can stream responses as they are generated.

Qwen3.5 Plus was built by Alibaba Cloud.

Yes. It supports tools, parallel tool calls, and web search as part of its feature set.

Start building with Qwen3.5 Plus

Get API Key
1000+ models, one API.