GLM 5.3 FlashX Legal vs Muse Spark Open
GLM 5.3 FlashX Legal took 45 min 14 s and $0.42 at list price, Muse Spark Open took 9 min 38 s and $0.29 at list price. GLM 5.3 FlashX Legal took 4.7× as long and cost 1.4× as much.
GLM 5.3 FlashX Legal
Z.ai · $1.25/M out
Muse Spark Open
Meta · $4.25/M out · 1,383 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 and restoration of vintage synthesizers. We work on the machines that shaped the sound of the last fifty years — Roland, Moog, Yamaha, Korg, EMS, and the rest — from the rare and legendary to the well-loved and well-worn.
We started the studio because these instruments matter. They were built to be repaired, with discrete components, schematics, and construction that reward patience and care. Somewhere along the way, that way of making things fell out of fashion. We think it's worth keeping alive.
Every synthesizer that comes through our door is treated the same way: carefully diagnosed, honestly assessed, and repaired with respect for its original character. No unnecessary modifications, no shortcuts that compromise the instrument. Whether it's a failed voice chip, a dead key, or years of dust and neglect, our job is to put the machine back in the hands of the people who play it.
Patchbay is a small studio in Rotterdam where vintage synthesizers come back to life. We are three technicians, musicians and longtime collectors who have spent the last decade trading schematics, hunting spare parts, and learning the quirks of every oscillator and filter that has passed through our hands.
What started as helping friends keep their Junos and ARPs in tune has grown into a dedicated workshop in the north of the city. We repair, restore and service instruments from the sixties to the early nineties, from well-known classics to rare prototypes that barely left the factory.
We believe these machines are more than equipment. They carry histories, imperfections and sounds that cannot be replaced. Our job is to respect that character while making sure each instrument is reliable, playable, and ready for another lifetime of music.
Specs and numbers
| GLM 5.3 FlashX Legal | Muse Spark Open | |
|---|---|---|
| Maker | Z.ai | Meta |
| Made in | China | US |
| Released | 2 Nov 2026 | 15 Oct 2026 |
| Price in, per M tokens | $0.37 | $1.25 |
| Price out, per M tokens | $1.25 | $4.25 |
| Context | 1,048,576 tokens | 1,048,576 tokens |
| Weights | closed | open |
| Hacker News points | — | 1,383 |
| Time for the six prompts | 45 min 14 s | 9 min 38 s |
| List price of the six prompts | $0.42 | $0.29 |
Muse Spark Open was cheaper: $0.13 less at list price, and less on 5 of the 6 prompts. Muse Spark Open was faster: 35 min 36 s less in total, and faster on 5 of the 6 prompts.
In the recording, both Breakout games play.
Rebuild this screen experiment: Muse Spark Open's rebuild matched the screenshot at 53%; GLM 5.3 FlashX Legal was not in it. Tea Garden experiment: Muse Spark Open's game passed 5 of 5 checks; GLM 5.3 FlashX Legal was not in it.





