Kimi K3.1 Pro vs Claude Fable 5.1
Kimi K3.1 Pro took 32 min 17 s and $1.27 at list price, Claude Fable 5.1 took 16 min 4 s and $3.97 at list price. Kimi K3.1 Pro took 2.0× as long, and Claude Fable 5.1 cost 3.1× as much.
Kimi K3.1 Pro
Moonshot AI · $10.00/M out · 1,168 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 devoted to keeping vintage synthesizers alive, playable, and full of character. We work on instruments that have spent decades in studios, bedrooms, and tour cases, and we believe each one deserves more than a quick fix. From drifting oscillators and noisy sliders to tired keybeds and mysterious faults, we take the time to listen, diagnose, and repair with care.
Our approach combines patient troubleshooting, period-correct components where possible, and a deep respect for the original sound. We do not believe in erasing an instrument’s history; we preserve the quirks that make it worth loving. Whether your synthesizer needs a full overhaul or a little help getting back on stage, you will always know who is working on it and why. Patchbay exists for the joy of switching on an old machine and hearing it come back to life.
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
| Kimi K3.1 Pro | Claude Fable 5.1 | |
|---|---|---|
| Maker | Moonshot AI | Anthropic |
| Made in | China | US |
| Released | 23 Oct 2026 | 1 Sep 2026 |
| Price in, per M tokens | $2.00 | $10.00 |
| Price out, per M tokens | $10.00 | $50.00 |
| Context | 1,048,576 tokens | 1,000,000 tokens |
| Weights | closed | closed |
| Hacker News points | 1,168 | 1,630 |
| Time for the six prompts | 32 min 17 s | 16 min 4 s |
| List price of the six prompts | $1.27 | $3.97 |
Kimi K3.1 Pro was cheaper: $2.71 less at list price, and less on 5 of the 6 prompts. Claude Fable 5.1 was faster: 16 min 12 s less in total, and faster on each of the 6 prompts.
In the recording, Kimi K3.1 Pro's Breakout game plays; Claude Fable 5.1's stopped painting.
Rebuild this screen experiment: Kimi K3.1 Pro's rebuild matched the screenshot at 87%, Claude Fable 5.1's 78%. Tea Garden experiment: Kimi K3.1 Pro's game passed 5 of 5 checks, Claude Fable 5.1's 5 of 5.





