Real gateway models — same endpoint, swap the model field per request.

curl -X POST <endpoint> \
  -H "Authorization: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-oss-20b","messages":[{"role":"user","content":"hi"}]}'

import requests

response = requests.post(
    "<endpoint>",
    headers={
        "Authorization": "YOUR_KEY",
        "Content-Type": "application/json"
    },
    json={
        "model": "openai/gpt-oss-20b",
        "messages": [{"role": "user", "content": "hi"}]
    }
)
print(response.json())

const response = await fetch("<endpoint>", {
  method: "POST",
  headers: {
    "Authorization": "YOUR_KEY",
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    model: "openai/gpt-oss-20b",
    messages: [{ role: "user", content: "hi" }]
  })
});
const data = await response.json();
console.log(data);

const fetch = require("node-fetch"); // or global fetch on Node 18+

const response = await fetch("<endpoint>", {
  method: "POST",
  headers: {
    "Authorization": "YOUR_KEY",
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    model: "openai/gpt-oss-20b",
    messages: [{ role: "user", content: "hi" }]
  })
});
const data = await response.json();
console.log(data);

Replace MODEL_ID with any model listed above, and YOUR_KEY with a key created below. No "Bearer" prefix needed — the bare key works.