Qwen3.5 4B (free)

Model ID

Use It in Python

from openai import OpenAI

client = OpenAI(
    base_url="https://models.mixlayer.ai/v1",
    api_key="YOUR_API_KEY",
)

response = client.chat.completions.create(
    model="qwen/qwen3.5-4b-free",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

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Free Tier Limits (Mixlayer)