Grok 4.7 vs Gemini 3.8 Flash
Grok 4.7 took 18 min 1 s and $0.63 at list price, Gemini 3.8 Flash took 8 min 33 s and $0.32 at list price. Grok 4.7 took 2.1× as long and cost 1.9× as much.
Grok 4.7
xAI · $6.00/M out · 629 HN pts
Gemini 3.8 Flash
Google · $4.13/M out · 1,293 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 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.
Tucked away in Rotterdam, Patchbay is a three-person repair studio dedicated to the preservation and revival of vintage synthesizers. We believe that classic instruments are living machines rather than museum relics—tools built to inspire, create, and be played loud. Between the three of us, we combine decades of experience in electronics engineering, sound design, and meticulous craftsmanship. Whether tracking down elusive voice chips for an eighties polyphonic giant, rebuilding power supplies, or recalibrating the drift on a cantankerous monophonic circuit from the seventies, we treat every piece of gear with obsessive attention to detail. Our workbench is built on a deep respect for historical engineering and a refusal to cut corners. For musicians, producers, and collectors across the Netherlands and beyond, Patchbay is where forgotten circuits find their current again, keeping the tactile soul of analog synthesis alive and resonant.
Specs and numbers
| Grok 4.7 | Gemini 3.8 Flash | |
|---|---|---|
| Maker | xAI | |
| Made in | US | US |
| Released | 21 Sep 2026 | 2 Sep 2026 |
| Price in, per M tokens | $2.00 | $0.825 |
| Price out, per M tokens | $6.00 | $4.13 |
| Context | 500,000 tokens | 1,048,576 tokens |
| Weights | closed | closed |
| Hacker News points | 629 | 1,293 |
| Time for the six prompts | 18 min 1 s | 8 min 33 s |
| List price of the six prompts | $0.63 | $0.32 |
Gemini 3.8 Flash was cheaper: $0.30 less at list price, and less on 4 of the 6 prompts. Gemini 3.8 Flash was faster: 9 min 28 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%; Gemini 3.8 Flash was not in it. Tea Garden experiment: Grok 4.7's game passed 5 of 5 checks; Gemini 3.8 Flash was not in it.





