data/develop/api-reference/chat/chat-input.md

---
title: st.chat_input
slug: /develop/api-reference/chat/st.chat_input
description: st.chat_input displays a chat input widget.
---

<Tip>

Read the [Build a basic LLM chat app](/develop/tutorials/llms/build-conversational-apps) tutorial to learn how to use `st.chat_message` and `st.chat_input` to build chat-based apps.

</Tip>

<Autofunction function="streamlit.chat_input" />

For an overview of the `st.chat_input` and `st.chat_message` API, check out this video tutorial by Chanin Nantasenamat ([@dataprofessor](https://www.youtube.com/dataprofessor)), a Senior Developer Advocate at Streamlit.

<YouTube videoId="4sPnOqeUDmk" />