My iPhone generated my fine-tuning dataset overnight — Mac coordinated, phone ran the teacher model, then the Mac trained on what the phone wrote

This story is from 2026-09-14. It is preserved in the archive; the latest stories are on the live feed.

I kept looking at my iPhone sitting on its charger and thinking: that's a multi-TFLOPS GPU doing nothing for 8 hours a night. My first idea was distributed training, shard the model, each phone trains some layers. That dies fast when you do the math: pipeline parallelism needs every device up simul…

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1. 2026-09-14 06:43 · r/LocalLLM
   My iPhone generated my fine-tuning dataset overnight — Mac coordinated, phone ran the teacher model, then the Mac trained on what the phone wrote