• Updated 31 Oct, 14:35 UTC
  • Next run 1 Nov, 05:17 UTCNext 1 Nov 05:17
  • Last 7 days: 4 new models · 448 runs7 d: 4 models · 448 runs
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Step 5 Preview vs Claude Fable 5.1

6 prompts both ran·Specs and numbers·Change models

Step 5 Preview took 10 min 44 s and $0.33 at list price, Claude Fable 5.1 took 16 min 4 s and $3.97 at list price. Claude Fable 5.1 took 1.5× as long and cost 12× as much.

Step 5 Preview

StepFun · $2.70/M out · 155 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

Step 5 Preview's SVG for the "Pelican riding a bicycle" prompt

Step 5 Preview

32 s$0.0196.9k tokensAPI
Claude Fable 5.1's SVG for the "Pelican riding a bicycle" prompt

Claude Fable 5.1

26 s$0.0971.9k tokensCLI

Watch

Draw a mechanical wristwatch that shows the current local time, with a sweeping seconds hand and a date window. Make it look expensive.

Still of Step 5 Preview's page for the "Wristwatch that shows the current time" prompt

Step 5 Preview

22 s$0.0134.9k tokensAPI
Still of Claude Fable 5.1's page for the "Wristwatch that shows the current time" prompt

Claude Fable 5.1

2 min 16 s$0.6012k tokensCLI

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.

Still of Step 5 Preview's page for the "Landing page for a cargo bike workshop" prompt

Step 5 Preview

4 min 7 s$0.1453k tokensAPI
Still of Claude Fable 5.1's page for the "Landing page for a cargo bike workshop" prompt

Claude Fable 5.1

5 min 44 s$1.4729k tokensCLI

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.

Still of Step 5 Preview's page for the "Playable Breakout" prompt

Step 5 Preview

1 min 55 s$0.06825k tokensAPI
Still of Claude Fable 5.1's page for the "Playable Breakout" prompt

Claude Fable 5.1

5 min 38 s$1.4228k tokensCLI

Design a logo for Night Heron, an independent bookshop that only opens after dark.

Step 5 Preview's SVG for the "Bookshop logo" prompt

Step 5 Preview

3 min 41 s$0.08431k tokensAPI
Claude Fable 5.1's SVG for the "Bookshop logo" prompt

Claude Fable 5.1

1 min 43 s$0.357.0k tokensCLI

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 workshop based in Rotterdam, dedicated to keeping vintage synthesizers alive and playable. We are technicians, musicians, and obsessive tinkerers who believe that classic analog instruments deserve better than silence. From temperamental Jupiter-8s to worn-out ARP Odysseys, we restore, repair, and maintain the machines that shaped the sound of modern music. Every repair starts with listening—both to the instrument and to the person who plays it. Whether you are chasing a rare fault, need a full calibration, or simply want your old synth to feel new again, our bench is open. We understand that no two synthesizers arrive with the same story, and we treat each circuit, slider, and key with the care its history deserves. At Patchbay, we are here to make sure the sounds of tomorrow are built on those that came before.

Step 5 Preview

7 s$0.003919 tokensAPI

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.

Claude Fable 5.1

17 s$0.025494 tokensCLI

Specs and numbers

Step 5 PreviewClaude Fable 5.1
MakerStepFunAnthropic
Made inChinaUS
Released8 Oct 20261 Sep 2026
Price in, per M tokens$1.00$10.00
Price out, per M tokens$2.70$50.00
Context1,048,576 tokens1,000,000 tokens
Weightsopenclosed
Hacker News points1551,630
Time for the six prompts10 min 44 s16 min 4 s
List price of the six prompts$0.33$3.97

Step 5 Preview was cheaper: $3.64 less at list price, and less on each of the 6 prompts. Step 5 Preview was faster: 5 min 21 s less in total, and faster on 4 of the 6 prompts.

In the recording, Step 5 Preview's Breakout game plays; Claude Fable 5.1's stopped painting.

Rebuild this screen experiment: Claude Fable 5.1's rebuild matched the screenshot at 78%; Step 5 Preview was not in it. Tea Garden experiment: Claude Fable 5.1's game passed 5 of 5 checks; Step 5 Preview was not in it.

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