You are given a MusicXML file of Bach’s Cello Suite No. 1 Prelude (BWV 1007). Build a single self-contained HTML page that performs it both audibly (Web Audio) and visually (canvas), as creatively as you can — no libraries, one shot. Avoid the notes-falling-on-a-piano-roll cliché.
Make it yours. Swap the piece named in the first sentence ("Bach’s Cello Suite No. 1 Prelude (BWV 1007)") and attach its MusicXML instead. Keep "no libraries, one shot" and the closing line that rules out the piano-roll look.
Bach cello prelude performed by six models
A two-minute reel of six models each turning the same MusicXML score of Bach's Cello Suite No. 1 Prelude into one self-contained HTML page that plays it with Web Audio and draws it on canvas, in one shot with no libraries. About $3 in tokens for all six.
“Setup: each model got the identical prompt and one attempt”
You'll need
- A MusicXML file of the piece (the creator used a public MuseScore arrangement)
- A way to record the page as a video
How it was made
Each model got the prompt with the MusicXML file attached and one attempt. The PromptFrenzy write-up the creator links adds that there were no follow-ups or tools, and that every model ran at its provider's default effort under a shared 64k output-token budget, raised for GLM-5.2. GPT-5.5's first page crashed its own render loop, so it got a second identical shot, which is the one shown. The pages were rendered frame by frame with offline audio rather than screen-recorded. DeepSeek V4 Pro plays the piece about four times too fast.
About $3 in tokens across all six models
Posted Jul 2, 2026 · r/singularity on Reddit · 399 upvotes · 50 comments
Prompt from: Comment on the post
Look notesby Reference
Six canvas visualizations of the same Bach prelude, one per model and each labelled with its cost: linked glowing dots, a rainbow spiral, a tangle of white light ribbons, orbiting gold bodies, a blue-green melodic line, and a nearly empty starfield.
- Color
- Black and dark navy grounds. White and pale green for Claude Fable 5, a rainbow burst in gray haze for Claude Sonnet 5, white ribbons with pink nodes for GPT-5.5, gold for Gemini 3.1 Pro, and a green-to-blue gradient for GLM-5.2.
- Type
- The model name in white at top left over a small red line with the lab and cost ("Anthropic · ≈$1.59 (priciest)"), and bold white captions centered at the bottom, with prompt quotes in pink italics.
- Framing
- 16:9. Each visualization sits in the middle of a dark frame with the label in the top-left corner and two-line captions along the bottom; GPT-5.5's page adds a thin progress bar and measure counter at the bottom edge.
- Sound
- Each page plays the prelude itself with Web Audio, and the pages were rendered with offline audio rather than screen-recorded, according to the creator's write-up.
- Structure
- Claude Fable 5 under "All six got the IDENTICAL prompt, one attempt each. No retries. No edits. No libraries." and then a quoted line of the prompt, Claude Sonnet 5's "a spiral of sound" after about 45,000 tokens of thinking, GPT-5.5's "ribbon of light weaving the melody" at two points, Gemini 3.1 Pro as "the cheapest of the big labs: ≈$0.17", GLM-5.2, which "thought the longest: ~20 MINUTES", then "The whole six-model orchestra: about $3 in tokens.", and DeepSeek V4 Pro, labelled "4x too fast", over a nearly empty dark frame.
