GPT-6.1 Terra vs Kimi K3
GPT-6.1 Terra took 5 min 29 s and $0.15 at list price, Kimi K3 took 22 min 52 s and $1.92 at list price. Kimi K3 took 4.2× as long and cost 13× as much.
GPT-6.1 Terra
OpenAI · $5.00/M out · 706 HN pts
Kimi K3
Moonshot AI · $15.00/M out · 9,870 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 small workshop in Rotterdam where old synthesizers come back to life. We are three people — a former recording engineer, a self-taught circuit obsessive, and a classically trained pianist who fell in love with broken machines — and between us we have spent decades coaxing sound out of equipment the rest of the world gave up on.
We started Patchbay because we kept meeting the same problem: beloved instruments sitting silent in attics and studio corners, written off as unfixable. A Juno with a dead voice chip. A Prophet that drifts out of tune. A Moog that hums when it shouldn't. To us, none of these are lost causes. They are instruments with history in them, and they deserve careful hands, original parts where possible, and honest work.
Every synth that leaves our bench is played, tested, and listened to — because that is what it was made for.
Specs and numbers
| GPT-6.1 Terra | Kimi K3 | |
|---|---|---|
| Maker | OpenAI | Moonshot AI |
| Made in | US | China |
| Released | 26 Oct 2026 | 16 Jul 2026 |
| Price in, per M tokens | $1.00 | $0.192 |
| Price out, per M tokens | $5.00 | $15.00 |
| Context | 1,050,000 tokens | 1,048,576 tokens |
| Weights | closed | open |
| Hacker News points | 706 | 9,870 |
| Time for the six prompts | 5 min 29 s | 22 min 52 s |
| List price of the six prompts | $0.15 | $1.92 |
GPT-6.1 Terra was cheaper: $1.77 less at list price, and less on each of the 6 prompts. GPT-6.1 Terra was faster: 17 min 23 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%, Kimi K3's 68%. Tea Garden experiment: GPT-6.1 Terra's game passed 5 of 5 checks, Kimi K3's 5 of 5.