GPT-6 Luna vs Grok 4.7
GPT-6 Luna took 4 min 43 s and $0.017 at list price, Grok 4.7 took 18 min 1 s and $0.63 at list price. Grok 4.7 took 3.8× as long and cost 37× as much.
GPT-6 Luna
OpenAI · $0.50/M out · 24 HN pts
Grok 4.7
xAI · $6.00/M out · 629 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 repairing vintage synthesizers. We work with instruments that have been played, carried, opened up, and passed from one owner to the next. Each arrives with its own history and its own set of quirks, so we begin by listening carefully and tracing the problem before reaching for a fix.
Our work ranges from straightforward maintenance to deeper electronic repairs. We clean, test, diagnose, and restore with the aim of making a synthesizer reliable again while respecting the design that gives it its voice. When a repair calls for a replacement part, we look for a solution that fits the instrument rather than treating it as disposable.
Patchbay is run by three people who share a curiosity about how these machines work and a respect for the sounds they make. We believe a well-cared-for synthesizer has plenty more music in it, and we’re here to help it find its way back into someone’s hands.
Patchbay is a three-person studio in Rotterdam devoted to the repair of vintage synthesizers. We work on instruments that have already lived a long life on stages, in studios, and in spare rooms, and we treat each one as something worth keeping rather than replacing. Our benches are set up for careful diagnosis, component-level repair, and the slow work of bringing an old circuit back into reliable use.
The three of us share the shop, the tools, and the jobs. One person may trace a failing voice while another sources a part or recalibrates an oscillator; we pass instruments between us until the sound is right and the hardware is stable. Clients come to us with analog polys, early digital machines, drum boxes, and the odd modular that has been patched and repatched for decades. We listen first, then open the case.
We are not a museum and we are not a showroom. Patchbay exists so that working musicians, collectors, and curious owners in Rotterdam and beyond can keep playing the instruments they already love.
Specs and numbers
| GPT-6 Luna | Grok 4.7 | |
|---|---|---|
| Maker | OpenAI | xAI |
| Made in | US | US |
| Released | 22 Sep 2026 | 21 Sep 2026 |
| Price in, per M tokens | $0.10 | $2.00 |
| Price out, per M tokens | $0.50 | $6.00 |
| Context | 1,050,000 tokens | 500,000 tokens |
| Weights | closed | closed |
| Hacker News points | 24 | 629 |
| Time for the six prompts | 4 min 43 s | 18 min 1 s |
| List price of the six prompts | $0.017 | $0.63 |
GPT-6 Luna was cheaper: $0.61 less at list price, and less on each of the 6 prompts. GPT-6 Luna was faster: 13 min 18 s less in total, and faster on 4 of the 6 prompts.
In the recording, both Breakout games play.
Rebuild this screen experiment: Grok 4.7's rebuild matched the screenshot at 59%; GPT-6 Luna was not in it. Tea Garden experiment: Grok 4.7's game passed 5 of 5 checks; GPT-6 Luna was not in it.