Chat Completions Overview

The Chat Completions API endpoint will generate a model response from a list of messages comprising a conversation.

Related guides:

• Quickstart
• Text inputs and outputs
• Image inputs
• Audio inputs and outputs
• Structured Outputs
• Function calling
• Conversation state

Starting a new project? We recommend trying Responses to take advantage of the latest OpenAI platform features. Compare Chat Completions with Responses.