What you can build
01Build assistants
02Analyze documents
03Generate structured text
04Use external tools
OI
Artificial intelligence
OpenAI
AI models that work with text, images and audio and can use tools from your system.
Three concepts to understand
Token
A small unit of text used to measure input, output and cost.
Prompt
The instruction and context sent to a model.
Tool calling
When AI asks your system to execute a defined function.
How to get started
- Define a small, verifiable task.
- Send only the context the task needs.
- Validate output before executing real actions.
Quick answers
Where should a new API project start?
The Responses API is the recommended starting point for current agentic experiences.
Does the model know my company data?
Only data provided in the request or through tools you explicitly authorize.