• Updated 31 Oct, 14:35 UTC
  • Next run 1 Nov, 05:17 UTCNext 1 Nov 05:17
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Xing 4.0 vs Claude Opus 5.5

5 prompts both ran·Specs and numbers·Change models

Xing 4.0 took 25 min 32 s and was free at list price, Claude Opus 5.5 took 11 min 3 s and $1.49 at list price. Xing 4.0 took 2.3× as long.

Xing 4.0

XingChen · free route

Claude Opus 5.5

Anthropic · $20.00/M out · 2,737 HN pts

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

Pelican

Generate an SVG of a pelican riding a bicycle

Xing 4.0's SVG for the "Pelican riding a bicycle" prompt

Xing 4.0

1 min 42 sfree7.5k tokensAPI
Claude Opus 5.5's SVG for the "Pelican riding a bicycle" prompt

Claude Opus 5.5

25 s$0.0462.3k 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 Xing 4.0's page for the "Wristwatch that shows the current time" prompt

Xing 4.0

7 min 41 sfree30k tokensAPI
Still of Claude Opus 5.5's page for the "Wristwatch that shows the current time" prompt

Claude Opus 5.5

1 min 42 s$0.2211k 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 Xing 4.0's page for the "Landing page for a cargo bike workshop" prompt

Blank first frame. Press Run.

Xing 4.0

4 min 2 sfree19k tokensAPI
Still of Claude Opus 5.5's page for the "Landing page for a cargo bike workshop" prompt

Claude Opus 5.5

4 min 8 s$0.5930k 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 Xing 4.0's page for the "Playable Breakout" prompt

Xing 4.0

11 min 5 sfree43k tokensAPI
Still of Claude Opus 5.5's page for the "Playable Breakout" prompt

Claude Opus 5.5

4 min 39 s$0.6331k 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 compact, three-person workshop rooted in the dynamic streets of Rotterdam, born from a shared reverence for analog sound. Our team shares an unwavering dedication to vintage synthesizers, viewing each oscillator, filter, and routing cable as a vital piece of sonic history waiting to be restored. Whether diagnosing a failing voltage regulator or carefully retrofitting obsolete components, we take immense pride in bringing classic instruments back to their full potential. In our studio, repairing isn't just a technical service—it is a shared passion among friends who believe the past deserves to keep playing. We meticulously diagnose and revive legacy synths, ensuring the iconic sounds of yesterday continue shaping today’s electronic music. Bring us your dented, broken machines, and let us help you reconnect them with the rich, unmistakable sounds they were always meant to make. Every patch, every knob, every fleeting tone depends on the work we do here.

Xing 4.0

63 sfree6.8k tokensAPI

Patchbay is three people in a narrow workshop near the Maas in Rotterdam. Every day we open up instruments that were built before most of their current owners were born. Some arrive in flight cases and some come wrapped in old bath towels. Most have a story: a Juno that went quiet halfway through a gig, a Minimoog left in someone's attic for thirty years, or a modular system that a previous technician gave up on.

We started Patchbay because we kept seeing good synthesizers sent off as "unrepairable" when all they needed was patience, a schematic and a steady hand. We swap out dried capacitors, hunt for intermittent faults, recalibrate oscillators until they track properly again, and source or rebuild parts that stopped being made decades ago.

We don't try to make old machines sound new. Our job is to make them sound like themselves again, and to make sure they keep working for the next person who plays them.

Claude Opus 5.5

9 s$0.009458 tokensCLI

Specs and numbers

Xing 4.0Claude Opus 5.5
MakerXingChenAnthropic
Made inChinaUS
Released16 Oct 202622 Sep 2026
Price in, per M tokensfree route (list $0/M)$4.00
Price out, per M tokensfree route (list $0/M)$20.00
Context262,144 tokens1,000,000 tokens
Weightsopenclosed
Hacker News points—2,737
Time for the five prompts25 min 32 s11 min 3 s
List price of the five promptsfree$1.49

Xing 4.0 was free at list price; Claude Opus 5.5 cost $1.49. Claude Opus 5.5 was faster: 14 min 29 s less in total, and faster on 4 of the 5 prompts.

In the recording, both Breakout games play. Xing 4.0's landing page showed a blank first frame when the still was taken. Xing 4.0 has no logo: doesn’t draw (an SVG file without the SVG namespace, which browsers draw as an empty box).

Rebuild this screen experiment: Claude Opus 5.5's rebuild matched the screenshot at 89%; Xing 4.0 was not in it. Tea Garden experiment: Claude Opus 5.5's game passed 5 of 5 checks; Xing 4.0 was not in it.

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