GPT-6.1 Terra Pro vs Kimi K3.1 Pro
GPT-6.1 Terra Pro took 6 min 58 s and $0.39 at list price, Kimi K3.1 Pro took 32 min 17 s and $1.27 at list price. Kimi K3.1 Pro took 4.6× as long and cost 3.3× as much.
GPT-6.1 Terra Pro
OpenAI · $5.00/M out
Kimi K3.1 Pro
Moonshot AI · $10.00/M out · 1,168 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.
Patchbay is a three-person studio in Rotterdam devoted to keeping vintage synthesizers alive, playable, and full of character. We work on instruments that have spent decades in studios, bedrooms, and tour cases, and we believe each one deserves more than a quick fix. From drifting oscillators and noisy sliders to tired keybeds and mysterious faults, we take the time to listen, diagnose, and repair with care.
Our approach combines patient troubleshooting, period-correct components where possible, and a deep respect for the original sound. We do not believe in erasing an instrument’s history; we preserve the quirks that make it worth loving. Whether your synthesizer needs a full overhaul or a little help getting back on stage, you will always know who is working on it and why. Patchbay exists for the joy of switching on an old machine and hearing it come back to life.
Specs and numbers
| GPT-6.1 Terra Pro | Kimi K3.1 Pro | |
|---|---|---|
| Maker | OpenAI | Moonshot AI |
| Made in | US | China |
| Released | 26 Oct 2026 | 23 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 | — | 1,168 |
| Time for the six prompts | 6 min 58 s | 32 min 17 s |
| List price of the six prompts | $0.39 | $1.27 |
GPT-6.1 Terra Pro was cheaper: $0.88 less at list price, and less on each of the 6 prompts. GPT-6.1 Terra Pro was faster: 25 min 19 s less in total, and faster on each of the 6 prompts.
In the recording, both Breakout games play.
Rebuild this screen experiment: Kimi K3.1 Pro's rebuild matched the screenshot at 87%; GPT-6.1 Terra Pro was not in it. Tea Garden experiment: Kimi K3.1 Pro's game passed 5 of 5 checks; GPT-6.1 Terra Pro was not in it.