> ## 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/javascript/langchain/models) that supports [tool calling](/oss/javascript/langchain/models#tool-calling).

## Pass a model string

The simplest way to specify a model is to pass a string to [createDeepAgent](https://reference.langchain.com/javascript/deepagents/agent/createDeepAgent). Use the `provider:model` format to select a specific provider:

```typescript theme={null}
const agent = createDeepAgent({ model: "openai:gpt-5.3-codex" });
```

Under the hood, this calls @\[init\_chat\_model] with default parameters.

## Configure model parameters

To configure model-specific parameters, use @\[init\_chat\_model] or instantiate a provider model class directly:

<CodeGroup>
  ```typescript initChatModel theme={null}
  import { initChatModel } from "langchain/chat_models/universal";
  import { createDeepAgent } from "deepagents";

  const model = await initChatModel("anthropic:claude-sonnet-4-6", {
      maxTokens: 16000,
      thinking: { type: "enabled", budgetTokens: 10000 },  // [!code highlight]
  });
  const agent = createDeepAgent({ model });
  ```

  ```typescript Provider package theme={null}
  import { ChatAnthropic } from "@langchain/anthropic";
  import { createDeepAgent } from "deepagents";

  const model = new ChatAnthropic({
      model: "claude-sonnet-4-6",
      maxTokens: 16000,
      thinking: { type: "enabled", budgetTokens: 10000 },  // [!code highlight]
  });
  const agent = createDeepAgent({ model });
  ```
</CodeGroup>

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

## Supported models

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

## Learn more

* [Models in LangChain](/oss/javascript/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>