Kimi K3.1 Pro vs Muse Spark Open
Kimi K3.1 Pro took 32 min 17 s and $1.27 at list price, Muse Spark Open took 9 min 38 s and $0.29 at list price. Kimi K3.1 Pro took 3.4× as long and cost 4.4× as much.
Kimi K3.1 Pro
Moonshot AI · $10.00/M out · 1,168 HN pts
Muse Spark Open
Meta · $4.25/M out · 1,383 HN pts
Pelican
Generate an SVG of a pelican riding a bicycle
Watch
Draw a mechanical wristwatch that shows the current local time, with a sweeping seconds hand and a date window. Make it look expensive.
Landing
Build the landing page for Lumen Cycles, a Copenhagen workshop that builds custom cargo bikes to order. Make it look like a real brand you would trust with 4,000 euros.
Breakout
Make a Breakout game I can play right now with the keyboard or the mouse. Give it several levels, a score and some juice.
Logo
Design a logo for Night Heron, an independent bookshop that only opens after dark.
About
Write the opening of the About us page for Patchbay, a three-person studio in Rotterdam that repairs vintage synthesizers. About 150 words.
Patchbay is a three-person studio in Rotterdam devoted to keeping vintage synthesizers alive, playable, and full of character. We work on instruments that have spent decades in studios, bedrooms, and tour cases, and we believe each one deserves more than a quick fix. From drifting oscillators and noisy sliders to tired keybeds and mysterious faults, we take the time to listen, diagnose, and repair with care.
Our approach combines patient troubleshooting, period-correct components where possible, and a deep respect for the original sound. We do not believe in erasing an instrument’s history; we preserve the quirks that make it worth loving. Whether your synthesizer needs a full overhaul or a little help getting back on stage, you will always know who is working on it and why. Patchbay exists for the joy of switching on an old machine and hearing it come back to life.
Patchbay is a small studio in Rotterdam where vintage synthesizers come back to life. We are three technicians, musicians and longtime collectors who have spent the last decade trading schematics, hunting spare parts, and learning the quirks of every oscillator and filter that has passed through our hands.
What started as helping friends keep their Junos and ARPs in tune has grown into a dedicated workshop in the north of the city. We repair, restore and service instruments from the sixties to the early nineties, from well-known classics to rare prototypes that barely left the factory.
We believe these machines are more than equipment. They carry histories, imperfections and sounds that cannot be replaced. Our job is to respect that character while making sure each instrument is reliable, playable, and ready for another lifetime of music.
Specs and numbers
| Kimi K3.1 Pro | Muse Spark Open | |
|---|---|---|
| Maker | Moonshot AI | Meta |
| Made in | China | US |
| Released | 23 Oct 2026 | 15 Oct 2026 |
| Price in, per M tokens | $2.00 | $1.25 |
| Price out, per M tokens | $10.00 | $4.25 |
| Context | 1,048,576 tokens | 1,048,576 tokens |
| Weights | closed | open |
| Hacker News points | 1,168 | 1,383 |
| Time for the six prompts | 32 min 17 s | 9 min 38 s |
| List price of the six prompts | $1.27 | $0.29 |
Muse Spark Open was cheaper: $0.98 less at list price, and less on each of the 6 prompts. Muse Spark Open was faster: 22 min 39 s less in total, and faster on each of the 6 prompts.
In the recording, both Breakout games play.
Rebuild this screen experiment: Kimi K3.1 Pro's rebuild matched the screenshot at 87%, Muse Spark Open's 53%. Tea Garden experiment: Kimi K3.1 Pro's game passed 5 of 5 checks, Muse Spark Open's 5 of 5.