GPT-6.1 Terra Pro vs Gemini 4 Argon
GPT-6.1 Terra Pro took 6 min 58 s and $0.39 at list price, Gemini 4 Argon took 13 min 43 s and $0.68 at list price. Gemini 4 Argon took 2.0× as long and cost 1.8× as much.
GPT-6.1 Terra Pro
OpenAI · $5.00/M out
Gemini 4 Argon
Google · $10.00/M out · 2,036 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. We work on the instruments that have shaped decades of music, from well-loved studio staples to curious machines that have spent years in storage.
Old synthesizers develop problems in their own ways. A key stops responding, a filter drifts, a power supply gives out. We take the time to trace the fault, understand the instrument and make a repair that respects how it was built. Wherever possible, we preserve original components; when a part needs replacing, we choose with care.
We know these instruments are more than collections of circuits. They carry sounds, habits and memories, and each one has a story before it reaches our bench. Whether you rely on yours every day or are hoping to hear it again after a long silence, our aim is to help you get back to making music.
In a quiet industrial building overlooking the Maas, the air smells of warm dust, solder flux, and ozone. This is Patchbay, a three-person workshop in Rotterdam dedicated to keeping the golden age of electronic music alive. We don’t view vintage synthesizers as museum pieces to be locked behind glass. To us, a Roland Jupiter-8 or an ARP Odyssey is a living, breathing instrument meant to be played, gigged, and pushed to its sonic limits.
Between the three of us, we have spent decades deciphering faded schematics, hunting down obsolete transistors, and cleaning decades of club grime from beneath weighted keys. Rotterdam is a city built on raw electronics and relentless rhythms, and we take pride in keeping its hardware running. Whether you bring us a touring workhorse with a dead voice chip or a garage-find modular rig that hasn’t powered on since 1984, we are here to make it sing again.
Specs and numbers
| GPT-6.1 Terra Pro | Gemini 4 Argon | |
|---|---|---|
| Maker | OpenAI | |
| Made in | US | US |
| Released | 26 Oct 2026 | 13 Oct 2026 |
| Price in, per M tokens | $1.00 | $2.00 |
| Price out, per M tokens | $5.00 | $10.00 |
| Context | 1,050,000 tokens | 1,048,576 tokens |
| Weights | closed | closed |
| Hacker News points | — | 2,036 |
| Time for the six prompts | 6 min 58 s | 13 min 43 s |
| List price of the six prompts | $0.39 | $0.68 |
GPT-6.1 Terra Pro was cheaper: $0.29 less at list price, and less on 5 of the 6 prompts. GPT-6.1 Terra Pro was faster: 6 min 44 s less in total, and faster on 5 of the 6 prompts.
In the recording, both Breakout games play.
Rebuild this screen experiment: Gemini 4 Argon's rebuild matched the screenshot at 69%; GPT-6.1 Terra Pro was not in it. Tea Garden experiment: Gemini 4 Argon's game passed 5 of 5 checks; GPT-6.1 Terra Pro was not in it.