模型列表里有这个型号，为什么换上 API Key 还是调不通？

import { createServer } from 'node:http';

const server = createServer(async (req, res) => {
  res.setHeader('content-type', 'application/json; charset=utf-8');

  if (req.method === 'GET' && req.url === '/v1/models') {
    res.end(JSON.stringify({
      data: [{ id: 'demo-chat' }, { id: 'demo-restricted' }]
    }));
    return;
  }

  if (req.method === 'POST' && req.url === '/v1/chat/completions') {
    let body = '';
    for await (const chunk of req) body += chunk;
    const { model } = JSON.parse(body);

    if (model === 'demo-restricted') {
      res.writeHead(403);
      res.end(JSON.stringify({ error: { message: 'model unavailable to this key' } }));
      return;
    }

    res.end(JSON.stringify({
      choices: [{ message: { content: 'ok' }, finish_reason: 'stop' }]
    }));
    return;
  }

  res.writeHead(404);
  res.end(JSON.stringify({ error: { message: 'unknown path' } }));
});

await new Promise(resolve => server.listen(0, '127.0.0.1', resolve));
const base = `http://127.0.0.1:${server.address().port}`;

try {
  const listed = await fetch(`${base}/v1/models`).then(r => r.json());
  console.log('目录:', listed.data.map(x => x.id).join(', '));

  for (const model of listed.data.map(x => x.id)) {
    const response = await fetch(`${base}/v1/chat/completions`, {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ model, messages: [{ role: 'user', content: 'ping' }] })
    });
    console.log(model, 'HTTP', response.status);
  }
} finally {
  server.close();
}