• Updated 2 Nov, 13:50 UTC
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GLM 5.3 FlashX Legal vs Muse Spark Open

6 prompts both ran·Specs and numbers·Change models

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

GLM 5.3 FlashX Legal's SVG for the "Pelican riding a bicycle" prompt

GLM 5.3 FlashX Legal

6 min 19 s$0.05947k tokensAPI
Muse Spark Open's SVG for the "Pelican riding a bicycle" prompt

Muse Spark Open

81 s$0.0389.0k tokensAPI

Watch

Draw a mechanical wristwatch that shows the current local time, with a sweeping seconds hand and a date window. Make it look expensive.

Still of GLM 5.3 FlashX Legal's page for the "Wristwatch that shows the current time" prompt

GLM 5.3 FlashX Legal

9 min 36 s$0.08467k tokensAPI
Still of Muse Spark Open's page for the "Wristwatch that shows the current time" prompt

Muse Spark Open

43 s$0.05212k tokensAPI

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.

Still of GLM 5.3 FlashX Legal's page for the "Landing page for a cargo bike workshop" prompt

GLM 5.3 FlashX Legal

12 min 13 s$0.1292k tokensAPI
Still of Muse Spark Open's page for the "Landing page for a cargo bike workshop" prompt

Muse Spark Open

4 min 12 s$0.08720k tokensAPI

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.

Still of GLM 5.3 FlashX Legal's page for the "Playable Breakout" prompt

GLM 5.3 FlashX Legal

11 min 20 s$0.1184k tokensAPI
Still of Muse Spark Open's page for the "Playable Breakout" prompt

Muse Spark Open

2 min 40 s$0.06916k tokensAPI

Design a logo for Night Heron, an independent bookshop that only opens after dark.

GLM 5.3 FlashX Legal's SVG for the "Bookshop logo" prompt

GLM 5.3 FlashX Legal

5 min 42 s$0.05141k tokensAPI
Muse Spark Open's SVG for the "Bookshop logo" prompt

Muse Spark Open

37 s$0.0378.7k tokensAPI

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.

GLM 5.3 FlashX Legal

3 s<$0.001238 tokensAPI

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.

Muse Spark Open

4 s$0.0051.0k tokensAPI

Specs and numbers

GLM 5.3 FlashX LegalMuse Spark Open
MakerZ.aiMeta
Made inChinaUS
Released2 Nov 202615 Oct 2026
Price in, per M tokens$0.37$1.25
Price out, per M tokens$1.25$4.25
Context1,048,576 tokens1,048,576 tokens
Weightsclosedopen
Hacker News points—1,383
Time for the six prompts45 min 14 s9 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.

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