• Updated 1 Nov, 10:02 UTC
  • Next run 2 Nov, 05:17 UTCNext 2 Nov 05:17
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Grok 4.7 vs Claude Fable 5.1

6 prompts both ran·Specs and numbers·Change models

Grok 4.7 took 18 min 1 s and $0.63 at list price, Claude Fable 5.1 took 16 min 4 s and $3.97 at list price. Grok 4.7 took 1.1× as long, and Claude Fable 5.1 cost 6.3× as much.

Grok 4.7

xAI · $6.00/M out · 629 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

Grok 4.7's SVG for the "Pelican riding a bicycle" prompt

Grok 4.7

18 s$0.0131.7k 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 Grok 4.7's page for the "Wristwatch that shows the current time" prompt

Grok 4.7

4 min 8 s$0.1525k 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 Grok 4.7's page for the "Landing page for a cargo bike workshop" prompt

Grok 4.7

3 min 12 s$0.1219k 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 Grok 4.7's page for the "Playable Breakout" prompt

Grok 4.7

7 min 49 s$0.2643k 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.

Grok 4.7's SVG for the "Bookshop logo" prompt

Grok 4.7

2 min 29 s$0.07712k 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 studio in Rotterdam devoted to the repair of vintage synthesizers. We work on instruments that have already lived a long life on stages, in studios, and in spare rooms, and we treat each one as something worth keeping rather than replacing. Our benches are set up for careful diagnosis, component-level repair, and the slow work of bringing an old circuit back into reliable use.

The three of us share the shop, the tools, and the jobs. One person may trace a failing voice while another sources a part or recalibrates an oscillator; we pass instruments between us until the sound is right and the hardware is stable. Clients come to us with analog polys, early digital machines, drum boxes, and the odd modular that has been patched and repatched for decades. We listen first, then open the case.

We are not a museum and we are not a showroom. Patchbay exists so that working musicians, collectors, and curious owners in Rotterdam and beyond can keep playing the instruments they already love.

Grok 4.7

5 s$0.004282 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

Grok 4.7Claude Fable 5.1
MakerxAIAnthropic
Made inUSUS
Released21 Sep 20261 Sep 2026
Price in, per M tokens$2.00$10.00
Price out, per M tokens$6.00$50.00
Context500,000 tokens1,000,000 tokens
Weightsclosedclosed
Hacker News points6291,630
Time for the six prompts18 min 1 s16 min 4 s
List price of the six prompts$0.63$3.97

Grok 4.7 was cheaper: $3.35 less at list price, and less on each of the 6 prompts. Claude Fable 5.1 was faster: 1 min 56 s less in total, and faster on 3 of the 6 prompts.

In the recording, Grok 4.7's Breakout game plays; Claude Fable 5.1's stopped painting.

Rebuild this screen experiment: Grok 4.7's rebuild matched the screenshot at 59%, Claude Fable 5.1's 78%. Tea Garden experiment: Grok 4.7's game passed 5 of 5 checks, Claude Fable 5.1's 5 of 5.

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