GPT-6.1 Terra vs Hy4 Preview
GPT-6.1 Terra took 5 min 29 s and $0.15 at list price, Hy4 Preview took 34 min 52 s and $0.32 at list price. Hy4 Preview took 6.4× as long and cost 2.2× as much.
GPT-6.1 Terra
OpenAI · $5.00/M out · 721 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, dedicated to repairing vintage synthesizers and keeping them in use.
Old instruments have a way of becoming familiar: the feel of a key, the response of a filter, the particular sound a circuit makes when it’s working as it should. When something goes wrong, we take the time to understand both the fault and the instrument around it. We work carefully, preserving original parts wherever practical and making repairs with the long term in mind.
Our studio brings together a shared interest in electronics, sound and the machines that connect them. Whether a synthesizer has a stubborn key, a noisy output or has been silent for years, we’re interested in finding a way forward.
We work with musicians, collectors and anyone who wants to hear an old instrument come to life again. If you have a synth that needs attention, we’d be glad to hear about 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
| GPT-6.1 Terra | Hy4 Preview | |
|---|---|---|
| Maker | OpenAI | Tencent |
| Made in | US | China |
| Released | 26 Oct 2026 | 28 Aug 2026 |
| Price in, per M tokens | $1.00 | $0.834 |
| Price out, per M tokens | $5.00 | $2.50 |
| Context | 1,050,000 tokens | 1,048,576 tokens |
| Weights | closed | open |
| Hacker News points | 721 | 440 |
| Time for the six prompts | 5 min 29 s | 34 min 52 s |
| List price of the six prompts | $0.15 | $0.32 |
GPT-6.1 Terra was cheaper: $0.18 less at list price, and less on 5 of the 6 prompts. GPT-6.1 Terra was faster: 29 min 23 s less in total, and faster on 5 of the 6 prompts.
In the recording, GPT-6.1 Terra's Breakout game plays; Hy4 Preview's loads but doesn't start.
Rebuild this screen experiment: GPT-6.1 Terra's rebuild matched the screenshot at 95%; Hy4 Preview was not in it. Tea Garden experiment: GPT-6.1 Terra's game passed 5 of 5 checks; Hy4 Preview was not in it.