• Updated 31 Oct, 14:35 UTC
  • Next run 1 Nov, 05:17 UTCNext 1 Nov 05:17
  • Last 7 days: 4 new models · 448 runs7 d: 4 models · 448 runs
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Xing 4.0 vs Claude Fable 5.1

5 prompts both ran·Specs and numbers·Change models

Xing 4.0 took 25 min 32 s and was free at list price, Claude Fable 5.1 took 14 min 21 s and $3.62 at list price. Xing 4.0 took 1.8× as long.

Xing 4.0

XingChen · free route

Claude Fable 5.1

Anthropic · $50.00/M out · 1,630 HN pts

Only Claude Fable 5.1 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 Fable 5.1's SVG for the "Pelican riding a bicycle" prompt

Claude Fable 5.1

26 s$0.0971.9k 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 Fable 5.1's page for the "Wristwatch that shows the current time" prompt

Claude Fable 5.1

2 min 16 s$0.6012k 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 Fable 5.1's page for the "Landing page for a cargo bike workshop" prompt

Claude Fable 5.1

5 min 44 s$1.4729k 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 Fable 5.1's page for the "Playable Breakout" prompt

Claude Fable 5.1

5 min 38 s$1.4228k 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 and one workshop in Rotterdam, and we spend our days bringing old synthesizers back to life. Most of what arrives at our bench is somewhere between thirty and fifty years old: a Juno with a dead voice chip, a Minimoog that drifts out of tune the moment the room warms up, a Polysix whose battery has quietly eaten its own circuit board. We know these instruments inside and out because we have had hundreds of them open on the table.

We started Patchbay because we kept meeting musicians who had been told their synth was not worth fixing. We disagree. These machines were built to be serviced, and with the right parts, enough patience, and a good set of schematics, almost any of them can be made to play again. When we hand an instrument back, we want it to sound the way it did the day it left the factory, or better.

Claude Fable 5.1

17 s$0.025494 tokensCLI

Specs and numbers

Xing 4.0Claude Fable 5.1
MakerXingChenAnthropic
Made inChinaUS
Released16 Oct 20261 Sep 2026
Price in, per M tokensfree route (list $0/M)$10.00
Price out, per M tokensfree route (list $0/M)$50.00
Context262,144 tokens1,000,000 tokens
Weightsopenclosed
Hacker News points—1,630
Time for the five prompts25 min 32 s14 min 21 s
List price of the five promptsfree$3.62

Xing 4.0 was free at list price; Claude Fable 5.1 cost $3.62. Claude Fable 5.1 was faster: 11 min 11 s less in total, and faster on 4 of the 5 prompts.

In the recording, Xing 4.0's Breakout game plays; Claude Fable 5.1's stopped painting. 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 Fable 5.1's rebuild matched the screenshot at 78%; Xing 4.0 was not in it. Tea Garden experiment: Claude Fable 5.1's game passed 5 of 5 checks; Xing 4.0 was not in it.

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