Kimi K3.1 Pro vs Hy4 Preview
Kimi K3.1 Pro took 32 min 17 s and $1.27 at list price, Hy4 Preview took 34 min 52 s and $0.32 at list price. Hy4 Preview took 1.1× as long, and Kimi K3.1 Pro cost 3.9× as much.
Kimi K3.1 Pro
Moonshot AI · $10.00/M out · 1,168 HN pts
Hy4 Preview
Tencent · $2.50/M out · 440 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 three-person studio in Rotterdam with a very specific obsession: bringing vintage synthesizers back to life. We are three technicians and musicians who spend our days surrounded by circuit boards, calibration tapes, and the smell of solder, coaxing sound out of machines that have been silent for years. From wobbly oscillators and dead keys to crackling faders and drifting filters, we diagnose, repair, and restore analog instruments with the patience they deserve. Our workshop is stocked with rare spare parts, original service manuals, and a deep archive of hard-won knowledge about classics from Moog, Roland, Sequential, Korg, and ARP. We love these instruments not as museum pieces, but as living tools that still have music in them. Every synthesizer that leaves our bench is tested, played, and calibrated so it feels reliable enough for the stage, the studio, or the late-night jam that inspired it in the first place.
Specs and numbers
| Kimi K3.1 Pro | Hy4 Preview | |
|---|---|---|
| Maker | Moonshot AI | Tencent |
| Made in | China | China |
| Released | 23 Oct 2026 | 28 Aug 2026 |
| Price in, per M tokens | $2.00 | $0.834 |
| Price out, per M tokens | $10.00 | $2.50 |
| Context | 1,048,576 tokens | 1,048,576 tokens |
| Weights | closed | open |
| Hacker News points | 1,168 | 440 |
| Time for the six prompts | 32 min 17 s | 34 min 52 s |
| List price of the six prompts | $1.27 | $0.32 |
Hy4 Preview was cheaper: $0.94 less at list price, and less on 5 of the 6 prompts. Kimi K3.1 Pro was faster: 2 min 35 s less in total, and faster on 4 of the 6 prompts.
In the recording, Kimi K3.1 Pro's Breakout game plays; Hy4 Preview's loads but doesn't start.
Rebuild this screen experiment: Kimi K3.1 Pro's rebuild matched the screenshot at 87%; Hy4 Preview was not in it. Tea Garden experiment: Kimi K3.1 Pro's game passed 5 of 5 checks; Hy4 Preview was not in it.