• 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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Pareto 26.9 vs Claude Opus 5.5

6 prompts both ran·Specs and numbers·Change models

Pareto 26.9 took 10 min 32 s and $0.34 at list price, Claude Opus 5.5 took 11 min 46 s and $1.57 at list price. Claude Opus 5.5 took 1.1× as long and cost 4.6× as much.

Pareto 26.9

Unbiased · $7.50/M out

Claude Opus 5.5

Anthropic · $20.00/M out · 2,737 HN pts

Only Claude Opus 5.5 has CLI runs here (Claude Code).

Pelican

Generate an SVG of a pelican riding a bicycle

Pareto 26.9's SVG for the "Pelican riding a bicycle" prompt

Pareto 26.9

41 s$0.1115k tokensAPI
Claude Opus 5.5's SVG for the "Pelican riding a bicycle" prompt

Claude Opus 5.5

25 s$0.0462.3k 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 Pareto 26.9's page for the "Wristwatch that shows the current time" prompt

Pareto 26.9

2 min$0.0526.9k tokensAPI
Still of Claude Opus 5.5's page for the "Wristwatch that shows the current time" prompt

Claude Opus 5.5

1 min 42 s$0.2211k 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 Pareto 26.9's page for the "Landing page for a cargo bike workshop" prompt

Pareto 26.9

4 min 1 s$0.09012k tokensAPI
Still of Claude Opus 5.5's page for the "Landing page for a cargo bike workshop" prompt

Claude Opus 5.5

4 min 8 s$0.5930k 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 Pareto 26.9's page for the "Playable Breakout" prompt

Pareto 26.9

2 min 28 s$0.0648.4k tokensAPI
Still of Claude Opus 5.5's page for the "Playable Breakout" prompt

Claude Opus 5.5

4 min 39 s$0.6331k tokensCLI

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

Pareto 26.9's SVG for the "Bookshop logo" prompt

Pareto 26.9

75 s$0.0152.0k tokensAPI
Claude Opus 5.5's SVG for the "Bookshop logo" prompt

Claude Opus 5.5

43 s$0.0783.9k 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 small workshop in the heart of Rotterdam, where three people spend their days elbow-deep in the guts of vintage synthesizers. We fix the machines that made the sounds you grew up with—the ones that shaped entire genres and then got left in basements when the tech moved on. But we're not a museum. Our benches are covered in solder, schematics, and the occasional broken key that's been there for two weeks longer than we'd like to admit.

We started this studio because we got tired of seeing classic gear being stripped for parts, or worse, turned into Instagram decor. These instruments deserve better. They were built to make noise, and we want to keep them doing exactly that.

Between the three of us, we've fixed everything from a 1960s Buchla to a beat-up Juno that fell down a flight of stairs. If you've got a synth that's gone quiet, bring it in. We'll bring it back.

Pareto 26.9

6 s$0.006788 tokensAPI

Patchbay is three people in a narrow workshop near the Maas in Rotterdam. Every day we open up instruments that were built before most of their current owners were born. Some arrive in flight cases and some come wrapped in old bath towels. Most have a story: a Juno that went quiet halfway through a gig, a Minimoog left in someone's attic for thirty years, or a modular system that a previous technician gave up on.

We started Patchbay because we kept seeing good synthesizers sent off as "unrepairable" when all they needed was patience, a schematic and a steady hand. We swap out dried capacitors, hunt for intermittent faults, recalibrate oscillators until they track properly again, and source or rebuild parts that stopped being made decades ago.

We don't try to make old machines sound new. Our job is to make them sound like themselves again, and to make sure they keep working for the next person who plays them.

Claude Opus 5.5

9 s$0.009458 tokensCLI

Specs and numbers

Pareto 26.9Claude Opus 5.5
MakerUnbiasedAnthropic
Made in—US
Released13 Oct 202622 Sep 2026
Price in, per M tokens$2.50$4.00
Price out, per M tokens$7.50$20.00
Context262,144 tokens1,000,000 tokens
Weightsclosedclosed
Hacker News points—2,737
Time for the six prompts10 min 32 s11 min 46 s
List price of the six prompts$0.34$1.57

Pareto 26.9 was cheaper: $1.23 less at list price, and less on 5 of the 6 prompts. Pareto 26.9 was faster: 74 s less in total, and faster on 3 of the 6 prompts.

In the recording, both Breakout games play. Pareto 26.9's landing page was cut off at the output limit (12,000 tokens).

Rebuild this screen experiment: Claude Opus 5.5's rebuild matched the screenshot at 89%; Pareto 26.9 was not in it. Tea Garden experiment: Claude Opus 5.5's game passed 5 of 5 checks; Pareto 26.9 was not in it.

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