# Developer trains 125M-parameter MIDI autocomplete model running at 108 notes/sec on iPhone 15

> Source: <https://www.getreadyforagents.com/news/midi-autocomplete-125m-iphone/>
> Published: 2026-08-21 20:05:09+00:00

# Developer trains 125M-parameter MIDI autocomplete model running at 108 notes/sec on iPhone 15

A developer trained a 125M-parameter transformer for real-time MIDI autocomplete performing at approximately 108 notes per second on iPhone 15, modeled after GitHub Copilot's code completion approach but for piano performances. The model uses MIDI event sequences rather than audio, with improvements from data cleaning and direct preference optimization post-training.

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[Read article](https://simedw.com/2026/08/20/midi-autocomplete/)

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