OpenAI SDK

pip install openai

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.apione.ai/v1",
    api_key=os.environ["APIONE_API_KEY"],
    timeout=60.0,
    max_retries=2,
)

resp = client.chat.completions.create(
    model="claude-sonnet-4-6",
    messages=[{"role": "user", "content": "Introduce yourself"}],
)
print(resp.choices[0].message.content)
print(resp.model, resp.usage.total_tokens)

with client.chat.completions.stream(
    model="claude-sonnet-4-6",
    messages=[{"role": "user", "content": "Write a short poem about caching"}],
) as stream:
    for event in stream:
        if event.type == "content.delta":
            print(event.delta, end="", flush=True)

from openai import AsyncOpenAI

client = AsyncOpenAI(
    base_url="https://api.apione.ai/v1",
    api_key=os.environ["APIONE_API_KEY"],
)

async def ask(prompt: str) -> str:
    resp = await client.chat.completions.create(
        model="gemini-3.5-flash",
        messages=[{"role": "user", "content": prompt}],
    )
    return resp.choices[0].message.content

npm i openai

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.apione.ai/v1",
  apiKey: process.env.APIONE_API_KEY,
  timeout: 60_000,
  maxRetries: 2,
});

const resp = await client.chat.completions.create({
  model: "claude-sonnet-4-6",
  messages: [{ role: "user", content: "Introduce yourself" }],
});
console.log(resp.choices[0].message.content);

const tools = [{
  type: "function",
  function: {
    name: "get_weather",
    description: "Current weather for a city",
    parameters: {
      type: "object",
      properties: { city: { type: "string" } },
      required: ["city"],
    },
  },
}];

const first = await client.chat.completions.create({
  model: "gpt-5.6-sol",
  messages: [{ role: "user", content: "What's the weather in Beijing?" }],
  tools,
});

const call = first.choices[0].message.tool_calls?.[0];
// Run your own function, send the result back as role: "tool", then call again