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GPT / OpenAI API
Foundation Model / API
OpenAI's GPT models — the most widely integrated AI API
What it is
OpenAI's GPT-4 and GPT-4o models are the most widely used AI APIs in the world. Available via REST API, Python/JS SDKs, and the Assistants API (which adds persistent threads, file search, and code interpreter). Foundation for most AI products built in 2023-2024.
Best for
Integration into existing products via API. The Assistants API provides a managed layer for building agents with memory, file access, and tool use without managing state yourself.
👤 Human use cases
- Build AI features into any application via REST API
- Use Assistants API for stateful, multi-turn AI assistants
- Fine-tune models on custom data for specialized tasks
- Access multimodal capabilities (vision, audio) via GPT-4o
🤖 Agent use cases
- Function calling for structured agent tool use
- Assistants API for managed agent threads and memory
- Batch API for high-throughput agent workloads
- Most agent frameworks support OpenAI API out of the box
How to install / get access
pip install openai
from openai import OpenAI
client = OpenAI(api_key='sk-...')
response = client.chat.completions.create(
model='gpt-4o',
messages=[{'role': 'user', 'content': 'Hello'}]
)