response = client.chat.completions.create( model="gpt-4o", messages=[{"role": "user", "content": "Hello!"}] ) print(response.choices[0].message.content)


### Node.js

```bash
npm install openai

import OpenAI from "openai";

const client = new OpenAI();  // Uses OPENAI_API_KEY env var

const response = await client.chat.completions.create({
  model: "gpt-4o",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Environment Variables

export OPENAI_API_KEY="sk-..."
export OPENAI_ORG_ID="org-..."      # Optional
export OPENAI_PROJECT_ID="proj-..." # Optional

Key Features

Feature	Python	Node.js
Sync client	`OpenAI()`	`new OpenAI()`
Async client	`AsyncOpenAI()`	Same (async/await)
Streaming	`stream=True`	`stream: true`
Auto-retry	Built-in	Built-in
Timeout	`timeout=60`	`timeout: 60000`
Types	Full typing	TypeScript

Common Operations

Chat Completion

response = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Hi"}]
)

Streaming

stream = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Hi"}],
    stream=True
)
for chunk in stream:
    print(chunk.choices[0].delta.content or "", end="")

Embeddings

response = client.embeddings.create(
    model="text-embedding-3-small",
    input="Hello world"
)
vector = response.data[0].embedding

Image Generation

response = client.images.generate(
    model="dall-e-3",
    prompt="A sunset over mountains",
    size="1024x1024"
)
url = response.data[0].url

Audio Transcription

with open("audio.mp3", "rb") as f:
    transcript = client.audio.transcriptions.create(
        model="whisper-1",
        file=f
    )
print(transcript.text)

Error Handling

from openai import OpenAI, APIError, RateLimitError

client = OpenAI()

try:
    response = client.chat.completions.create(...)
except RateLimitError:
    # Retry with backoff
except APIError as e:
    print(f"API error: {e.status_code}")

References

python.md — Full Python SDK guide
nodejs.md — Full Node.js SDK guide
streaming.md — Streaming patterns for both

openai-api skill — Raw REST API without SDK

Environment Variables

Key Features

Common Operations

Chat Completion

Streaming

Embeddings

Image Generation

Audio Transcription

Error Handling

References

Related

openai-sdk

OpenAI SDK

Quick Start

Python