> ## Documentation Index
> Fetch the complete documentation index at: https://langchain-5e9cc07a-preview-cbfron-1772840960-d2a2597.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Models

Deep agents work with any [LangChain chat model](/oss/python/langchain/models) that supports [tool calling](/oss/python/langchain/models#tool-calling).

## Pass a model string

The simplest way to specify a model is to pass a string to [create\_deep\_agent](https://reference.langchain.com/python/deepagents/graph/create_deep_agent). Use the `provider:model` format to select a specific provider:

```python theme={null}
agent = create_deep_agent(model="openai:gpt-5.3-codex")
```

Under the hood, this calls [init\_chat\_model](https://reference.langchain.com/python/langchain/chat_models/base/init_chat_model) with default parameters.

## Configure model parameters

To configure model-specific parameters, use [init\_chat\_model](https://reference.langchain.com/python/langchain/chat_models/base/init_chat_model) or instantiate a provider model class directly:

<CodeGroup>
  ```python init_chat_model theme={null}
  from langchain.chat_models import init_chat_model
  from deepagents import create_deep_agent

  model = init_chat_model(
      model="anthropic:claude-sonnet-4-6",
      thinking={"type": "enabled", "budget_tokens": 10000},  # [!code highlight]
  )
  agent = create_deep_agent(model=model)
  ```

  ```python Provider package theme={null}
  from langchain_anthropic import ChatAnthropic
  from deepagents import create_deep_agent

  model = ChatAnthropic(
      model="claude-sonnet-4-6",
      thinking={"type": "enabled", "budget_tokens": 10000},  # [!code highlight]
  )
  agent = create_deep_agent(model=model)
  ```
</CodeGroup>

<Note>
  Available parameters vary by provider. See the [chat model integrations](/oss/python/integrations/chat) page for provider-specific configuration options.
</Note>

## Supported models

Deep agents work with any chat model that supports [tool calling](/oss/python/langchain/models#tool-calling). See [chat model integrations](/oss/python/integrations/chat) for the full list of supported providers.

## Learn more

* [Models in LangChain](/oss/python/langchain/models): chat model features including tool calling, structured output, and multimodality

***

<div className="source-links">
  <Callout icon="edit">
    [Edit this page on GitHub](https://github.com/langchain-ai/docs/edit/main/src/oss/deepagents/models.mdx) or [file an issue](https://github.com/langchain-ai/docs/issues/new/choose).
  </Callout>

  <Callout icon="terminal-2">
    [Connect these docs](/use-these-docs) to Claude, VSCode, and more via MCP for real-time answers.
  </Callout>
</div>