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Flint vs Hy4 Preview

6 prompts both ran·Specs and numbers·Change models

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

Flint's SVG for the "Pelican riding a bicycle" prompt

Flint

43 sfree5.6k tokensAPI
Hy4 Preview's SVG for the "Pelican riding a bicycle" prompt

Hy4 Preview

4 min 30 s$0.06727k tokensAPI

Watch

Draw a mechanical wristwatch that shows the current local time, with a sweeping seconds hand and a date window. Make it look expensive.

Still of Flint's page for the "Wristwatch that shows the current time" prompt

Flint

2 min 11 sfree18k tokensAPI
Still of Hy4 Preview's page for the "Wristwatch that shows the current time" prompt

Hy4 Preview

44 s$0.0114.2k tokensAPI

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.

Still of Flint's page for the "Landing page for a cargo bike workshop" prompt

Flint

2 min 52 sfree22k tokensAPI
Still of Hy4 Preview's page for the "Landing page for a cargo bike workshop" prompt

Hy4 Preview

7 min 45 s$0.06225k tokensAPI

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.

Still of Flint's page for the "Playable Breakout" prompt

Flint

2 min 19 sfree18k tokensAPI
Still of Hy4 Preview's page for the "Playable Breakout" prompt

Hy4 Preview

12 min 37 s$0.1145k tokensAPI

Design a logo for Night Heron, an independent bookshop that only opens after dark.

Flint's SVG for the "Bookshop logo" prompt

Flint

1 min 47 sfree13k tokensAPI
Hy4 Preview's SVG for the "Bookshop logo" prompt

Hy4 Preview

7 min 58 s$0.06024k tokensAPI

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.

Flint

13 sfree1.5k tokensAPI

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.

Hy4 Preview

79 s$0.0125.0k tokensAPI

Specs and numbers

FlintHy4 Preview
MakerRecursiveTencent
Made inUSChina
Released21 Oct 202628 Aug 2026
Price in, per M tokensfree route (list $0/M)$0.834
Price out, per M tokensfree route (list $0/M)$2.50
Context262,144 tokens1,048,576 tokens
Weightsopenopen
Hacker News points36440
Time for the six prompts10 min 5 s34 min 52 s
List price of the six promptsfree$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.

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