Claude Fable 5.1 vs Nemotron 3 Ultra
Claude Fable 5.1 took 16 min 4 s and $3.97 at list price, Nemotron 3 Ultra took 14 min 14 s and $0.15 at list price. Claude Fable 5.1 took 1.1× as long and cost 27× as much.
Claude Fable 5.1
Anthropic · $50.00/M out · 1,630 HN pts
Nemotron 3 Ultra
NVIDIA · $2.40/M out · free route · 48 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 began in a narrow workshop on the edge of Rotterdam’s Noord district, where the hum of aging oscillators meets the rhythm of the city’s canals. Founded by three synth enthusiasts — a former studio engineer, a circuit designer, and a musician who still plays the same Juno‑106 he bought in 1986 — the studio grew from late‑night repair sessions into a dedicated space for restoring the instruments that shaped electronic music’s golden era. Every unit that passes through our bench is treated with the same reverence we give a first‑press vinyl: capacitors are swapped, contacts cleaned, and calibration traced back to original service manuals. We don’t just fix synthesizers; we listen to their history, understand their quirks, and return them to the stage or studio ready to inspire the next generation of sound. Patchbay is small, intentional, and built on the belief that vintage gear deserves a future as vivid as its past.
Specs and numbers
| Claude Fable 5.1 | Nemotron 3 Ultra | |
|---|---|---|
| Maker | Anthropic | NVIDIA |
| Made in | US | US |
| Released | 1 Sep 2026 | 4 Jun 2026 |
| Price in, per M tokens | $10.00 | free route (list $0.60/M) |
| Price out, per M tokens | $50.00 | free route (list $2.40/M) |
| Context | 1,000,000 tokens | 262,144 tokens |
| Weights | closed | open |
| Hacker News points | 1,630 | 48 |
| Time for the six prompts | 16 min 4 s | 14 min 14 s |
| List price of the six prompts | $3.97 | $0.15 |
Nemotron 3 Ultra was cheaper: $3.83 less at list price, and less on each of the 6 prompts. Nemotron 3 Ultra was faster: 1 min 51 s less in total, and faster on 3 of the 6 prompts.
In the recording, Claude Fable 5.1's Breakout game stopped painting; Nemotron 3 Ultra's loads but doesn't start.
Rebuild this screen experiment: Claude Fable 5.1's rebuild matched the screenshot at 78%; Nemotron 3 Ultra was not in it. Tea Garden experiment: Claude Fable 5.1's game passed 5 of 5 checks; Nemotron 3 Ultra was not in it.





