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Muse Spark Open vs Claude Sonnet 5.5

6 prompts both ran·Specs and numbers·Change models

Muse Spark Open took 9 min 38 s and $0.29 at list price, Claude Sonnet 5.5 took 3 min 49 s and $0.34 at list price. Muse Spark Open took 2.5× as long, and Claude Sonnet 5.5 cost 1.2× as much.

Muse Spark Open

Meta · $4.25/M out · 1,383 HN pts

Claude Sonnet 5.5

Anthropic · $10.00/M out · 9 HN pts

Only Claude Sonnet 5.5 has CLI runs here (Claude Code).

Pelican

Generate an SVG of a pelican riding a bicycle

Muse Spark Open's SVG for the "Pelican riding a bicycle" prompt

Muse Spark Open

81 s$0.0389.0k tokensAPI
Claude Sonnet 5.5's SVG for the "Pelican riding a bicycle" prompt

Claude Sonnet 5.5

12 s$0.0131.3k tokensCLI

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 Muse Spark Open's page for the "Wristwatch that shows the current time" prompt

Muse Spark Open

43 s$0.05212k tokensAPI
Still of Claude Sonnet 5.5's page for the "Wristwatch that shows the current time" prompt

Claude Sonnet 5.5

42 s$0.0656.5k tokensCLI

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 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
Still of Claude Sonnet 5.5's page for the "Landing page for a cargo bike workshop" prompt

Claude Sonnet 5.5

1 min 37 s$0.1616k tokensCLI

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 Muse Spark Open's page for the "Playable Breakout" prompt

Muse Spark Open

2 min 40 s$0.06916k tokensAPI
Still of Claude Sonnet 5.5's page for the "Playable Breakout" prompt

Claude Sonnet 5.5

53 s$0.0838.3k tokensCLI

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

Muse Spark Open's SVG for the "Bookshop logo" prompt

Muse Spark Open

37 s$0.0378.7k tokensAPI
Claude Sonnet 5.5's SVG for the "Bookshop logo" prompt

Claude Sonnet 5.5

17 s$0.0202.0k tokensCLI

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 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

Patchbay is three people in a workshop in Rotterdam, trying to keep old synthesizers alive. We repair, restore and recalibrate the instruments that shaped electronic music: Moogs and Oberheims, Rolands and Sequential Circuits, the odd temperamental Soviet oddity that someone found in an attic.

Most of what lands on our benches has been silent for years. A crackling pot, a drifting oscillator, a power supply that gave up in 1994. Some come from working musicians who need their instrument back before the next tour. Others come from people who inherited a dusty box from a parent and want to hear what it sounds like.

We work slowly and by hand. We trace faults with a scope and a schematic, source or rebuild parts when originals are gone, and change as little as we can. Every synth leaves with a note describing exactly what we did, so the next person to open it knows where we have been.

Come by, bring your synth, and stay for coffee.

Claude Sonnet 5.5

7 s$0.005475 tokensCLI

Specs and numbers

Muse Spark OpenClaude Sonnet 5.5
MakerMetaAnthropic
Made inUSUS
Released15 Oct 202628 Sep 2026
Price in, per M tokens$1.25$2.00
Price out, per M tokens$4.25$10.00
Context1,048,576 tokens1,000,000 tokens
Weightsopenclosed
Hacker News points1,3839
Time for the six prompts9 min 38 s3 min 49 s
List price of the six prompts$0.29$0.34

Muse Spark Open was cheaper: $0.054 less at list price, and less on 4 of the 6 prompts. Claude Sonnet 5.5 was faster: 5 min 49 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%, Claude Sonnet 5.5's 94%. Tea Garden experiment: Muse Spark Open's game passed 5 of 5 checks, Claude Sonnet 5.5's 5 of 5.

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