gpt-5-nano

from openai import OpenAI

client = OpenAI(
    api_key="sk-endai-...",
    base_url="https://api.endai.ir/v1",
)

resp = client.chat.completions.create(
    model="gpt-5-nano",
    messages=[{"role": "user", "content": "سلام!"}],
)

print(resp.choices[0].message.content)