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BYOK (Anthropic Key) Support Added!
You can now bring your own Anthropic API key to access Claude 4 models in Cascade:
- Claude Sonnet 4 & Claude Sonnet 4 (Thinking)
- Claude Opus 4 & Claude Opus 4 (Thinking)
To enable: Go to "provide API keys" → input your Anthropic key → reload Windsurf window.
Available now for Free and Pro users!
See full changelog: https://windsurf.com/changelog
I highly recommend using Claude 3.5 Sonnet through the API - you won't have rate limits, and with its cheaper cost you'll likely be spending less than a subscription to Claude Pro!
There's lots of open source web platforms that let you use your own API Key to do this. Albeit you won't get to use the artifacts feature.
I have a free native iOS app that supports chatting to Claude 3.5 Sonnet (and all other LLMs) using your own API Key which you could use: https://apps.apple.com/us/app/pal-chat-ai-chat-client/id6447545085?platform=iphone