Gemini 4 Carbon vs GPT-6.1 Terra
Gemini 4 Carbon took 18 min 40 s and $1.05 at list price, GPT-6.1 Terra took 5 min 29 s and $0.15 at list price. Gemini 4 Carbon took 3.4× as long and cost 7.2× as much.
Gemini 4 Carbon
Google · $10.00/M out · 308 HN pts
GPT-6.1 Terra
OpenAI · $5.00/M out · 724 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.
Tucked away in a bright workshop near the Rotterdam docks, Patchbay is a three-person studio dedicated to keeping electronic music history alive. We repair, restore, and calibrate vintage synthesizers, drum machines, and outboard gear. Whether it is a temperamental Juno with failing voice chips, a road-worn Minimoog drifting out of tune, or an obscure polysynth needing a complete overhaul, our benches are built for machines that make noise.
Between the three of us, we combine decades of experience in electronics, sound design, and obsessive troubleshooting. We do not view classic synthesizers as fragile museum pieces meant to sit behind glass; they are working instruments built to be played, patched, and pushed to their limits. Armed with original schematics, precision test gear, and a deep respect for analog circuitry, we bring tired hardware back from the brink—ready for another forty years in the studio or on stage.
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.
Specs and numbers
| Gemini 4 Carbon | GPT-6.1 Terra | |
|---|---|---|
| Maker | OpenAI | |
| Made in | US | US |
| Released | 10 Nov 2026 | 26 Oct 2026 |
| Price in, per M tokens | $2.00 | $1.00 |
| Price out, per M tokens | $10.00 | $5.00 |
| Context | 1,048,576 tokens | 1,050,000 tokens |
| Weights | closed | closed |
| Hacker News points | 308 | 724 |
| Time for the six prompts | 18 min 40 s | 5 min 29 s |
| List price of the six prompts | $1.05 | $0.15 |
GPT-6.1 Terra was cheaper: $0.91 less at list price, and less on each of the 6 prompts. GPT-6.1 Terra was faster: 13 min 11 s less in total, and faster on each of the 6 prompts.
In the recording, both Breakout games play.
Rebuild this screen experiment: GPT-6.1 Terra's rebuild matched the screenshot at 95%; Gemini 4 Carbon was not in it. Tea Garden experiment: GPT-6.1 Terra's game passed 5 of 5 checks; Gemini 4 Carbon was not in it.