Bytez Model API
by docs.bytez.com
AI models and chat
Added on November 3rd, 2026
Checked and working on November 3rd, 2026
Visit docs.bytez.com →
What it does
The Bytez Model API runs open models from Hugging Face, such as Qwen and Llama, and closed models from providers like OpenAI through one API. POST a JSON list of messages to /models/v2/, with the key in the Authorization header without a Bearer prefix. Free with a free API key and $1 of credit that refreshes every 4 weeks, for open models up to 7B parameters (one request at a time) and closed models; paid plans unlock larger models.
At a glance
- API key
- Needed, free · More APIs with a free key
- Pricing
- Free with a free API key and $1 of credit that refreshes every 4 weeks, for open models up to 7B parameters (one request at a time) and closed models; paid plans unlock larger models.
- From the browser
- No, call it from a server
- Formats
- JSON
- Interface
- REST
- Provider
- docs.bytez.com
- Last checked
- Working on November 3rd, 2026
More information: https://docs.bytez.com/model-api/docs/task/chat
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Example request
curl
curl -X POST 'https://api.bytez.com/models/v2/Qwen/Qwen3-4B' \
-H 'Authorization: YOUR_API_KEY' \
-H 'Content-Type: application/json' \
-d '{"messages":[{"role":"user","content":"Say hello in one word."}],"params":{"temperature":0}}'JavaScript
const response = await fetch("https://api.bytez.com/models/v2/Qwen/Qwen3-4B", {
method: 'POST',
headers: {
"Authorization": "YOUR_API_KEY",
"Content-Type": "application/json",
},
body: JSON.stringify({"messages":[{"role":"user","content":"Say hello in one word."}],"params":{"temperature":0}}),
});
const data = await response.json();
console.log(data);Python
import requests
response = requests.post(
"https://api.bytez.com/models/v2/Qwen/Qwen3-4B",
headers={
"Authorization": "YOUR_API_KEY",
"Content-Type": "application/json",
},
json={
"messages": [
{
"role": "user",
"content": "Say hello in one word.",
},
],
"params": {
"temperature": 0,
},
},
timeout=30,
)
print(response.json())Replace YOUR_API_KEY with your own key. Run the JavaScript on a server, such as Node.js 18 or newer: this API does not accept calls from web pages on other sites.