Hy4 vs Claude Fable 5.1
Hy4 took 16 min 15 s and $0.15 at list price, Claude Fable 5.1 took 16 min 4 s and $3.97 at list price. Both took about as long, and Claude Fable 5.1 cost 26× as much.
Hy4
Tencent · $1.25/M out · 404 HN pts
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.
Logo
Design a logo for Night Heron, an independent bookshop that only opens after dark.
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 repairing vintage synthesizers and the odd drum machine or piece of studio equipment. We look after instruments that have survived tours, basements, and years of silence in cupboards. Our task is not to make them new, but to make them dependable while keeping the character that made them worth saving.
Every repair starts with listening: to the fault, to the owner, and to the instrument itself. From there we diagnose carefully, solder cleanly, calibrate patiently, and replace parts only when necessary. Between us we bring electronics, restoration, design, and studio experience, which keeps the work practical, unhurried, and attentive to small details. We document what we find, source components with care, and explain the work in plain language. Some jobs take an afternoon; others become long conversations with forty-year-old circuits. In each case, the goal is simple: return the machine to the hands, recordings, and rooms where it belongs.
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
| Hy4 | Claude Fable 5.1 | |
|---|---|---|
| Maker | Tencent | Anthropic |
| Made in | China | US |
| Released | 4 Nov 2026 | 1 Sep 2026 |
| Price in, per M tokens | $0.417 | $10.00 |
| Price out, per M tokens | $1.25 | $50.00 |
| Context | 1,048,576 tokens | 1,000,000 tokens |
| Weights | open | closed |
| Hacker News points | 404 | 1,630 |
| Time for the six prompts | 16 min 15 s | 16 min 4 s |
| List price of the six prompts | $0.15 | $3.97 |
Hy4 was cheaper: $3.82 less at list price, and less on each of the 6 prompts. Both took about as long in total; Claude Fable 5.1 was faster on 4 of the 6 prompts.
In the recording, Hy4's Breakout game plays; Claude Fable 5.1's stopped painting.
Rebuild this screen experiment: Hy4's rebuild matched the screenshot at 79%, Claude Fable 5.1's 78%. Tea Garden experiment: Hy4's game passed 5 of 5 checks, Claude Fable 5.1's 5 of 5.





