# Custom LLM Agent (with a ChatModel)

This notebook goes through how to create your own custom agent based on a chat model.

An LLM chat agent consists of three parts:

- PromptTemplate: This is the prompt template that can be used to instruct the language model on what to do
- ChatModel: This is the language model that powers the agent
- `stop` sequence: Instructs the LLM to stop generating as soon as this string is found
- OutputParser: This determines how to parse the LLMOutput into an AgentAction or AgentFinish object

import Example from "@snippets/modules/agents/how_to/custom_llm_chat_agent.mdx"

<Example/>