Пять минут от API-⁠ключа до первого ответа.

curl https://api.areviaai.net/v1/chat/completions \
  -H "Authorization: Bearer $AREVIA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "sevan-2",
    "messages": [{"role": "user", "content": "Кратко изложи этот договор в трёх пунктах."}]
  }'

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.areviaai.net/v1",
    api_key=os.environ["AREVIA_API_KEY"],
)

response = client.chat.completions.create(
    model="sevan-2",
    messages=[{"role": "user", "content": "Кратко изложи этот договор в трёх пунктах."}],
)
print(response.choices[0].message.content)

$ch = curl_init('https://api.areviaai.net/v1/chat/completions');
curl_setopt_array($ch, [
    CURLOPT_POST           => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER     => [
        'Authorization: Bearer ' . getenv('AREVIA_API_KEY'),
        'Content-Type: application/json',
    ],
    CURLOPT_POSTFIELDS     => json_encode([
        'model'    => 'sevan-2',
        'messages' => [['role' => 'user', 'content' => 'Кратко изложи этот договор в трёх пунктах.']],
    ]),
]);

$response = json_decode(curl_exec($ch), true);
echo $response['choices'][0]['message']['content'];

const res = await fetch("https://api.areviaai.net/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AREVIA_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "sevan-2",
    messages: [{ role: "user", content: "Кратко изложи этот договор в трёх пунктах." }],
  }),
});
const data = await res.json();
console.log(data.choices[0].message.content);