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Engineering Insights

Porting the Moebius 0.2B image inpainting model to run in the browser with Claude Code

Simon Willison · Jun 22, 2026 · Engineering Insights

Simon Willison used Claude Code to port the Moebius 0.2B inpainting model to run in-browser via WebGPU.

“the harder a problem is the more time you have to get distracted while you wait for them to finish crunching!”

Simon Willison describes using Claude Code as a parallel agent to port the small Moebius image inpainting model from PyTorch/CUDA to run in the browser with ONNX Runtime Web on WebGPU, while his main task ran in Codex Desktop. It illustrates practical multi-agent coding workflows but is a personal engineering anecdote rather than a major industry signal.

claude-code webgpu agentic-coding inpainting onnx-runtime

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