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Claude Sonnet 3.7 and 4.0 are excellent for agent tasks. Great for complex reasoning and following instructions precisely.

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Get your API key

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Step 1: Go to Claude Console

Visit console.anthropic.com and click API keys in the left sidebar. SCR-20251007-kbjx.png

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Step 2: Create a key

Click Create Key, name it, and click Create Key again. Copy the key that appears. SCR-20251007-kbod.png

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Configure BrowserOS

Click the settings icon in BrowserOS, then click USE on the Claude card. Paste your API key and set your model. For Claude Sonnet 4.0, use model ID claude-opus-4-20250514, set Context Window Size to 128000, and check Supports Images. Click Save. image.png Done! You’re ready to use BrowserOS with Claude.
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