Image: u/oh-keh on Reddit · Piano hands playing the Fable 5.2 étude in the visualiser
A Chopin-style étude composed by Claude Fable 5.2 as MIDI
From one prompt with no rerolls, Claude Fable 5.2 spent 47 minutes writing an original, fast piano étude of 759 notes delivered as a MIDI file.
Credits
Earliest dated source:
The full story
One Claude user gives every new model the same test: one prompt in Claude Code for an original, fast piano piece in the style of a Chopin étude, as a MIDI file, with no rerolls. Claude Fable 5.2 at max effort took 47 minutes, 262,000 output tokens and $13.30, writing "Riptide", an étude in B-flat minor of 759 notes from A0 to C8, with Python. It can't hear anything; the notes, timing, dynamics and pedalling are its own, played back on a sampled grand through the user's visualiser. Opus 5.5 took 45 minutes and $7.20 for 651 notes.
How it was done
Tools
Themes
Loading themes…
Sources
From a short post by the maker, so the details are as they tell them.
- Reddit: PIANO Test on Fable 5.2!Reddit poster: oh-kehPosted
The post with the numbers.
- Reddit: Piano Test on Fable 5.2!Reddit poster: oh-kehPosted
The same post shared to r/ClaudeAI.