gpt-5-codex

curl https://api.nixapi.com/v1/chat/completions \
  -H "Authorization: Bearer $NIXAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5-codex",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

from openai import OpenAI

client = OpenAI(base_url="https://api.nixapi.com/v1", api_key="sk-…")

resp = client.chat.completions.create(
    model="gpt-5-codex",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)

import OpenAI from 'openai';

const client = new OpenAI({ baseURL: 'https://api.nixapi.com/v1', apiKey: process.env.NIXAPI_KEY });

const resp = await client.chat.completions.create({
  model: "gpt-5-codex",
  messages: [{ role: 'user', content: 'Hello!' }],
});
console.log(resp.choices[0].message.content);