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

# Anthropic

# Anthropic

Use Claude models in BOR with an Anthropic API key. Adapter: `server/providers/anthropic.js`.

## Setup

1. Get an API key from the Anthropic Console (the provider's `signupUrl` links there from onboarding).
2. In [onboarding](../getting-started/onboarding.md), pick **Anthropic**, paste your key, and choose a model.
3. BOR validates the key and you're in.

## Choosing a model

Pick a **current** Claude model from Anthropic's live docs. Model ids change on a months-long cadence, so prefer the latest capable model rather than an old hardcoded id. A vision-capable model is recommended so features like `locate_screen_element`, screenshot feedback in the [browser](../features/the-browser.md), and image attachments work.

## Notes

* Anthropic supports prompt **caching** and image blocks; BOR's multimodal layer handles both.
* Claude is strong at the tool-following BOR relies on (the XML protocol, the build→run→preview discipline).
* Configure later by editing `providers.anthropic` in the presence's `config.json`, or just ask BOR to switch models.

## Troubleshooting

* **401 / invalid key** — re-check the key in onboarding or `config.json`.
* **404 model** — the model id retired; pick a current one.
* See [Troubleshooting](../troubleshooting.md).