Summary & Key Takeaways ​

• The Moebius 0.2B image inpainting model has been successfully ported to run in the browser.
• The port leverages WebGPU for efficient execution of the AI model client-side.
• The original model required PyTorch and NVIDIA CUDA, highlighting the achievement of web compatibility.
• Simon Willison used Claude Code for web as an AI assistant during the porting process.
• A live demo is available, allowing users to try the inpainting tool directly in their browser.

Our Commentary ​

This is seriously impressive. Porting a PyTorch/CUDA model to WebGPU in the browser is no small feat, and doing it with the help of an AI coding assistant? That's a glimpse into the future of development. The demo is slick, and the performance is surprisingly good for a client-side AI. It makes me wonder how many other "desktop-only" AI tools could be brought to the web. This is a huge win for accessibility and privacy in AI.