• Updated 11 Nov, 12:43 UTC
  • Next run 12 Nov, 05:17 UTCNext 12 Nov 05:17
  • Last 7 days: 10 new models · 61 runs7 d: 10 models · 61 runs
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Gemini 4 Carbon vs Claude Fable 5.1

6 prompts both ran·Specs and numbers·Change models

Gemini 4 Carbon took 18 min 40 s and $1.05 at list price, Claude Fable 5.1 took 16 min 4 s and $3.97 at list price. Gemini 4 Carbon took 1.2× as long, and Claude Fable 5.1 cost 3.8× as much.

Gemini 4 Carbon

Google · $10.00/M out · 308 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

Gemini 4 Carbon's SVG for the "Pelican riding a bicycle" prompt

Gemini 4 Carbon

3 min 2 s$0.1212k 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 Gemini 4 Carbon's page for the "Wristwatch that shows the current time" prompt

Gemini 4 Carbon

5 min 21 s$0.2222k 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 Gemini 4 Carbon's page for the "Landing page for a cargo bike workshop" prompt

Gemini 4 Carbon

3 min 59 s$0.2727k 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 Gemini 4 Carbon's page for the "Playable Breakout" prompt

Gemini 4 Carbon

2 min 25 s$0.1919k 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.

Gemini 4 Carbon's SVG for the "Bookshop logo" prompt

Gemini 4 Carbon

3 min 20 s$0.2323k 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.

Tucked away in a bright workshop near the Rotterdam docks, Patchbay is a three-person studio dedicated to keeping electronic music history alive. We repair, restore, and calibrate vintage synthesizers, drum machines, and outboard gear. Whether it is a temperamental Juno with failing voice chips, a road-worn Minimoog drifting out of tune, or an obscure polysynth needing a complete overhaul, our benches are built for machines that make noise.

Between the three of us, we combine decades of experience in electronics, sound design, and obsessive troubleshooting. We do not view classic synthesizers as fragile museum pieces meant to sit behind glass; they are working instruments built to be played, patched, and pushed to their limits. Armed with original schematics, precision test gear, and a deep respect for analog circuitry, we bring tired hardware back from the brink—ready for another forty years in the studio or on stage.

Gemini 4 Carbon

33 s$0.0202.0k 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

Gemini 4 CarbonClaude Fable 5.1
MakerGoogleAnthropic
Made inUSUS
Released10 Nov 20261 Sep 2026
Price in, per M tokens$2.00$10.00
Price out, per M tokens$10.00$50.00
Context1,048,576 tokens1,000,000 tokens
Weightsclosedclosed
Hacker News points3081,630
Time for the six prompts18 min 40 s16 min 4 s
List price of the six prompts$1.05$3.97

Gemini 4 Carbon was cheaper: $2.92 less at list price, and less on 5 of the 6 prompts. Claude Fable 5.1 was faster: 2 min 35 s less in total, and faster on 4 of the 6 prompts.

In the recording, Gemini 4 Carbon'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%; Gemini 4 Carbon was not in it. Tea Garden experiment: Claude Fable 5.1's game passed 5 of 5 checks; Gemini 4 Carbon was not in it.

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