• Updated 1 Nov, 11:50 UTC
  • Next run 2 Nov, 05:17 UTCNext 2 Nov 05:17
  • Last 7 days: 4 new models · 99 runs7 d: 4 models · 99 runs
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Claude Sonnet 5.5 vs Kimi K3

6 prompts both ran·Specs and numbers·Change models

Claude Sonnet 5.5 took 3 min 49 s and $0.34 at list price, Kimi K3 took 22 min 52 s and $1.92 at list price. Kimi K3 took 6.0× as long and cost 5.6× as much.

Claude Sonnet 5.5

Anthropic · $10.00/M out · 9 HN pts

Kimi K3

Moonshot AI · $15.00/M out · 9,870 HN pts

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

Pelican

Generate an SVG of a pelican riding a bicycle

Claude Sonnet 5.5's SVG for the "Pelican riding a bicycle" prompt

Claude Sonnet 5.5

12 s$0.0131.3k tokensCLI
Kimi K3's SVG for the "Pelican riding a bicycle" prompt

Kimi K3

6 min 9 s$0.2718k tokensAPI

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 Claude Sonnet 5.5's page for the "Wristwatch that shows the current time" prompt

Claude Sonnet 5.5

42 s$0.0656.5k tokensCLI
Still of Kimi K3's page for the "Wristwatch that shows the current time" prompt

Kimi K3

3 min 36 s$0.4429k tokensAPI

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 Claude Sonnet 5.5's page for the "Landing page for a cargo bike workshop" prompt

Claude Sonnet 5.5

1 min 37 s$0.1616k tokensCLI
Still of Kimi K3's page for the "Landing page for a cargo bike workshop" prompt

Kimi K3

6 min 35 s$0.5033k tokensAPI

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 Claude Sonnet 5.5's page for the "Playable Breakout" prompt

Claude Sonnet 5.5

53 s$0.0838.3k tokensCLI
Still of Kimi K3's page for the "Playable Breakout" prompt

Kimi K3

4 min 25 s$0.4530k tokensAPI

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

Claude Sonnet 5.5's SVG for the "Bookshop logo" prompt

Claude Sonnet 5.5

17 s$0.0202.0k tokensCLI
Kimi K3's SVG for the "Bookshop logo" prompt

Kimi K3

2 min 2 s$0.2516k tokensAPI

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 in a workshop in Rotterdam, trying to keep old synthesizers alive. We repair, restore and recalibrate the instruments that shaped electronic music: Moogs and Oberheims, Rolands and Sequential Circuits, the odd temperamental Soviet oddity that someone found in an attic.

Most of what lands on our benches has been silent for years. A crackling pot, a drifting oscillator, a power supply that gave up in 1994. Some come from working musicians who need their instrument back before the next tour. Others come from people who inherited a dusty box from a parent and want to hear what it sounds like.

We work slowly and by hand. We trace faults with a scope and a schematic, source or rebuild parts when originals are gone, and change as little as we can. Every synth leaves with a note describing exactly what we did, so the next person to open it knows where we have been.

Come by, bring your synth, and stay for coffee.

Claude Sonnet 5.5

7 s$0.005475 tokensCLI

Patchbay is a small workshop in Rotterdam where old synthesizers come back to life. We are three people — a former recording engineer, a self-taught circuit obsessive, and a classically trained pianist who fell in love with broken machines — and between us we have spent decades coaxing sound out of equipment the rest of the world gave up on.

We started Patchbay because we kept meeting the same problem: beloved instruments sitting silent in attics and studio corners, written off as unfixable. A Juno with a dead voice chip. A Prophet that drifts out of tune. A Moog that hums when it shouldn't. To us, none of these are lost causes. They are instruments with history in them, and they deserve careful hands, original parts where possible, and honest work.

Every synth that leaves our bench is played, tested, and listened to — because that is what it was made for.

Kimi K3

6 s$0.013872 tokensAPI

Specs and numbers

Claude Sonnet 5.5Kimi K3
MakerAnthropicMoonshot AI
Made inUSChina
Released28 Sep 202616 Jul 2026
Price in, per M tokens$2.00$0.192
Price out, per M tokens$10.00$15.00
Context1,000,000 tokens1,048,576 tokens
Weightsclosedopen
Hacker News points99,870
Time for the six prompts3 min 49 s22 min 52 s
List price of the six prompts$0.34$1.92

Claude Sonnet 5.5 was cheaper: $1.58 less at list price, and less on each of the 6 prompts. Claude Sonnet 5.5 was faster: 19 min 3 s less in total, and faster on 5 of the 6 prompts.

In the recording, both Breakout games play.

Rebuild this screen experiment: Claude Sonnet 5.5's rebuild matched the screenshot at 94%, Kimi K3's 68%. Tea Garden experiment: Claude Sonnet 5.5's game passed 5 of 5 checks, Kimi K3's 5 of 5.

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