Cato Hernes Jensen

Rapidscall - Train your own AI language model on your Mac

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Rapidscall lets you train your own language model from scratch — on your Mac, with your own data. No cloud, no coding, no data leaves your device. Import any text dataset, build a custom tokenizer, configure a transformer model, and train it — all from one app. Built for Apple Silicon using Metal. Free tier lets you explore the full workflow and train single-layer models. Pro unlocks unlimited layers for production-quality models.

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Cato Hernes Jensen
Rapidscall started as a personal learning project and became a tool for anyone who wants to build their own model — on their own terms, on their own machine. Apple Silicon made it possible. Metal and unified memory mean a MacBook Air has genuine training capability. I wanted to make that accessible. Happy to answer any questions about the app or training process.