# Source: https://developers.openai.com/resources/guide/responses-vs-chat-completions-guide.md

# Responses vs. chat completions guide

> Comparison of the Responses API and Chat Completions.

- Type: Guide
- Tags: responses
- URL: https://platform.openai.com/docs/guides/responses-vs-chat-completions
- Created: 2025-07-21
- Updated: 2025-08-13

## Summary
Explains key differences and when to use each API. — Responses API, tools, function calling

## Details
Highlights capabilities and use cases for both Responses and Chat Completions APIs.