Kimi K3.1 Pro vs Mistral Large 4
Kimi K3.1 Pro took 32 min 17 s and $1.27 at list price, Mistral Large 4 took 51 min 22 s and $0.61 at list price. Mistral Large 4 took 1.6× as long, and Kimi K3.1 Pro cost 2.1× as much.
Kimi K3.1 Pro
Moonshot AI · $10.00/M out · 1,168 HN pts
Mistral Large 4
Mistral · $2.10/M out · 4,680 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 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.
Patchbay sits in a former warehouse on Rotterdam's northern edge, where the Maas meets the industrial harbour. Three of us work here—no more, no less—surrounded by oscilloscopes, desoldering stations, and the persistent hum of transformers. We repair vintage synthesizers. That is the whole business.
We are not a museum, and we are not a factory. Every Minimoog, ARP 2600, or Juno that crosses our bench receives the same stubborn attention: traced schematics, replaced capacitors, calibrated voltages, hours spent listening for the note that was never quite right. The machines arrive broken, silent, forgotten. They leave singing.
Rotterdam built its reputation on moving heavy things and keeping them moving. We apply the same pragmatism to circuits that predate us by forty years. If it made sound once, it can make sound again. That is the promise we keep, solder joint by solder joint.
Specs and numbers
| Kimi K3.1 Pro | Mistral Large 4 | |
|---|---|---|
| Maker | Moonshot AI | Mistral |
| Made in | China | France |
| Released | 23 Oct 2026 | 6 Oct 2026 |
| Price in, per M tokens | $2.00 | $0.70 |
| Price out, per M tokens | $10.00 | $2.10 |
| Context | 1,048,576 tokens | 1,048,576 tokens |
| Weights | closed | open |
| Hacker News points | 1,168 | 4,680 |
| Time for the six prompts | 32 min 17 s | 51 min 22 s |
| List price of the six prompts | $1.27 | $0.61 |
Mistral Large 4 was cheaper: $0.66 less at list price, and less on 5 of the 6 prompts. Kimi K3.1 Pro was faster: 19 min 5 s less in total, and faster on 3 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%, Mistral Large 4's 46%. Tea Garden experiment: Kimi K3.1 Pro's game passed 5 of 5 checks, Mistral Large 4's 2 of 5.