Xing 4.0 vs Claude Fable 5.1
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
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.
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.
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.
Specs and numbers
| Xing 4.0 | Claude Fable 5.1 | |
|---|---|---|
| Maker | XingChen | Anthropic |
| Made in | China | US |
| Released | 16 Oct 2026 | 1 Sep 2026 |
| Price in, per M tokens | free route (list $0/M) | $10.00 |
| Price out, per M tokens | free route (list $0/M) | $50.00 |
| Context | 262,144 tokens | 1,000,000 tokens |
| Weights | open | closed |
| Hacker News points | — | 1,630 |
| Time for the five prompts | 25 min 32 s | 14 min 21 s |
| List price of the five prompts | free | $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.





