Flint vs Hy4 Preview
Flint took 10 min 5 s and was free at list price, Hy4 Preview took 34 min 52 s and $0.32 at list price. Hy4 Preview took 3.5× as long.
Flint
Recursive · free route · 36 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 began in a small, cluttered workshop in Rotterdam, where solder smoke and old capacitors seem to belong together. We are a three-person studio, which means every synthesizer that comes through our door is handled by one of the same people who started the project. No call center, no hand-off to strangers. We repair vintage synthesizers: the dusty analog beasts, the rare oddities, the ones with missing knobs and mysterious tuning drift. Our work is part electronics, part archaeology, part stubborn love. We listen to the hum before we open the case, and we believe most vintage synths are not dead, just waiting for someone to pay attention. In a city known for moving quickly, we prefer taking our time. Patchbay exists to keep old voices alive, one oscillator, filter, and power supply at a time. If you have a synth that sings, whispers, or hums through the decades, we would be glad to meet it.
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
| Flint | Hy4 Preview | |
|---|---|---|
| Maker | Recursive | Tencent |
| Made in | US | China |
| Released | 21 Oct 2026 | 28 Aug 2026 |
| Price in, per M tokens | free route (list $0/M) | $0.834 |
| Price out, per M tokens | free route (list $0/M) | $2.50 |
| Context | 262,144 tokens | 1,048,576 tokens |
| Weights | open | open |
| Hacker News points | 36 | 440 |
| Time for the six prompts | 10 min 5 s | 34 min 52 s |
| List price of the six prompts | free | $0.32 |
Flint was free at list price; Hy4 Preview cost $0.32. Flint was faster: 24 min 47 s less in total, and faster on 5 of the 6 prompts.
In the recording, both Breakout games load but don't start.
Tea Garden experiment: Flint's game passed 5 of 5 checks; Hy4 Preview was not in it.





