> ## Documentation Index
> Fetch the complete documentation index at: https://docs.browseros.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ChatGPT Pro / Plus

> Use your ChatGPT subscription to power BrowserOS

Connect your ChatGPT Pro or Plus subscription to BrowserOS and access GPT-5 Codex, GPT-5.4, and the full lineup of OpenAI's most advanced models — with up to 400K context. No API keys needed.

## Setup

**1.** Open BrowserOS and go to **Settings** (`chrome://browseros/settings`). You'll see the AI Providers section.

<img src="https://mintcdn.com/browseros/Y0H3rh2Rj3FvtUQy/images/setting-up-chatgpt/llm-screen.png?fit=max&auto=format&n=Y0H3rh2Rj3FvtUQy&q=85&s=7c65be19f1a103182ff892779eb50143" alt="AI Settings screen" width="3052" height="1884" data-path="images/setting-up-chatgpt/llm-screen.png" />

**2.** Click **USE** on the **ChatGPT Plus/Pro** card. You'll be prompted to sign in with your OpenAI account.

<img src="https://mintcdn.com/browseros/Y0H3rh2Rj3FvtUQy/images/setting-up-chatgpt/login-screen.png?fit=max&auto=format&n=Y0H3rh2Rj3FvtUQy&q=85&s=21ebd54593d41a1c8221d78e88309246" alt="Login screen" width="3052" height="1884" data-path="images/setting-up-chatgpt/login-screen.png" />

**3.** Sign in with the OpenAI account that has your ChatGPT Pro or Plus subscription active, and accept the authorization.

<img src="https://mintcdn.com/browseros/Y0H3rh2Rj3FvtUQy/images/setting-up-chatgpt/accept-screen.png?fit=max&auto=format&n=Y0H3rh2Rj3FvtUQy&q=85&s=1cdf49287910869b3cc4350990f488a0" alt="Accept authorization" width="3052" height="1884" data-path="images/setting-up-chatgpt/accept-screen.png" />

**4.** Once authorized, ChatGPT will appear as a provider in your settings. Select a model and start using it.

## Available Models

| Model                | Context Window |
| -------------------- | -------------- |
| `gpt-5.4`            | 400K           |
| `gpt-5.3-codex`      | 400K           |
| `gpt-5.2-codex`      | 400K           |
| `gpt-5.2`            | 200K           |
| `gpt-5.1-codex`      | 400K           |
| `gpt-5.1-codex-max`  | 400K           |
| `gpt-5.1-codex-mini` | 400K           |
| `gpt-5.1`            | 200K           |

<Info>
  ChatGPT Pro subscribers have access to the full model lineup. ChatGPT Plus subscribers can access a subset of models depending on their plan. The available models will be shown automatically after you connect.
</Info>

<Tip>
  The Codex models (e.g., `gpt-5.3-codex`) are optimized for code and reasoning tasks — ideal for complex browser automation workflows that involve form filling, data extraction, and multi-step navigation.
</Tip>

## Reasoning Settings

ChatGPT Pro includes additional settings for models that support reasoning:

* **Reasoning Effort** — Control how much the model "thinks" before responding. Options: none, low, medium, high.
* **Reasoning Summary** — Choose how reasoning is displayed. Options: auto, concise, detailed.

These settings are available in the provider configuration after connecting.

## Disconnecting

To disconnect your OpenAI account, go to **Settings**, find the ChatGPT Plus/Pro provider, and click **Disconnect**. Your OAuth tokens will be immediately deleted from your machine.