Qwen3.5 9B

AlibabaMCP Tool CallReasoning

alibaba/qwen3.5-9bOpen Weights

Qwen instruction model for multilingual chat, reasoning, and tool use

Benchmark Pricing$0.11 / 1M in$0.17 / 1M out

Context: 262,144 tokens•Max Output: 65,536 tokens•Released: 2026-02-23

TECHNICAL SPECIFICATIONS

Context Window262,144262.1K tokens

Max Output65,53665.5K tokens

LicenseOpen SourceSelf-hostable

Input Modalities

TextVisionVideo

Function / Tool CallingSupported (MCP Ready)

Structured OutputsGuaranteed Schema

MODEL CONTEXT PROTOCOL (MCP) READINESS

✓ Qwen3.5 9B natively supports OpenAI / Anthropic format tool calling and is fully compatible with MCP servers and agent loops.

MCP Context Window Recommendations

With a context capacity of 262,144 tokens, this model can handle moderately large MCP tool definitions and multi-turn conversation logs comfortably.

API CALL INVOCATION EXAMPLE

// Example: Calling Qwen3.5 9B via OpenAI SDK
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.ALIBABA_API_KEY,
});

const response = await client.chat.completions.create({
  model: "alibaba/qwen3.5-9b",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

console.log(response.choices[0].message.content);