Claude Fable 5.1 vs Hy4 Preview
Claude Fable 5.1 took 16 min 4 s and $3.97 at list price, Hy4 Preview took 34 min 52 s and $0.32 at list price. Hy4 Preview took 2.2× as long, and Claude Fable 5.1 cost 12× as much.
Claude Fable 5.1
Anthropic · $50.00/M out · 1,630 HN pts
Hy4 Preview
Tencent · $2.50/M out · 440 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 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.
Patchbay is a three-person studio in Rotterdam with a very specific obsession: bringing vintage synthesizers back to life. We are three technicians and musicians who spend our days surrounded by circuit boards, calibration tapes, and the smell of solder, coaxing sound out of machines that have been silent for years. From wobbly oscillators and dead keys to crackling faders and drifting filters, we diagnose, repair, and restore analog instruments with the patience they deserve. Our workshop is stocked with rare spare parts, original service manuals, and a deep archive of hard-won knowledge about classics from Moog, Roland, Sequential, Korg, and ARP. We love these instruments not as museum pieces, but as living tools that still have music in them. Every synthesizer that leaves our bench is tested, played, and calibrated so it feels reliable enough for the stage, the studio, or the late-night jam that inspired it in the first place.
Specs and numbers
| Claude Fable 5.1 | Hy4 Preview | |
|---|---|---|
| Maker | Anthropic | Tencent |
| Made in | US | China |
| Released | 1 Sep 2026 | 28 Aug 2026 |
| Price in, per M tokens | $10.00 | $0.834 |
| Price out, per M tokens | $50.00 | $2.50 |
| Context | 1,000,000 tokens | 1,048,576 tokens |
| Weights | closed | open |
| Hacker News points | 1,630 | 440 |
| Time for the six prompts | 16 min 4 s | 34 min 52 s |
| List price of the six prompts | $3.97 | $0.32 |
Hy4 Preview was cheaper: $3.65 less at list price, and less on each of the 6 prompts. Claude Fable 5.1 was faster: 18 min 47 s less in total, and faster on 5 of the 6 prompts.
In the recording, Claude Fable 5.1's Breakout game stopped painting; Hy4 Preview's loads but doesn't start.
Rebuild this screen experiment: Claude Fable 5.1's rebuild matched the screenshot at 78%; Hy4 Preview was not in it. Tea Garden experiment: Claude Fable 5.1's game passed 5 of 5 checks; Hy4 Preview was not in it.





