• Updated 1 Nov, 11:50 UTC
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Mercury 3 vs Xing 4.0

5 prompts both ran·Specs and numbers·Change models

Mercury 3 took 3 min 53 s and $0.036 at list price, Xing 4.0 took 25 min 32 s and was free at list price. Xing 4.0 took 6.6× as long.

Mercury 3

Inception · $0.35/M out · 258 HN pts

Xing 4.0

XingChen · free route

Pelican

Generate an SVG of a pelican riding a bicycle

Mercury 3's SVG for the "Pelican riding a bicycle" prompt

Mercury 3

1 min 30 s$0.01028k tokensAPI
Xing 4.0's SVG for the "Pelican riding a bicycle" prompt

Xing 4.0

1 min 42 sfree7.5k 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 Mercury 3's page for the "Wristwatch that shows the current time" prompt

Mercury 3

70 s$0.01233k tokensAPI
Still of Xing 4.0's page for the "Wristwatch that shows the current time" prompt

Xing 4.0

7 min 41 sfree30k 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 Mercury 3's page for the "Landing page for a cargo bike workshop" prompt

Mercury 3

42 s$0.00720k tokensAPI
Still of Xing 4.0's page for the "Landing page for a cargo bike workshop" prompt

Blank first frame. Press Run.

Xing 4.0

4 min 2 sfree19k 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 Mercury 3's page for the "Playable Breakout" prompt

Mercury 3

29 s$0.00719k tokensAPI
Still of Xing 4.0's page for the "Playable Breakout" prompt

Xing 4.0

11 min 5 sfree43k 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 a three-person repair studio in Rotterdam, tucked between a bike shop and a coffee roastery, where vintage synthesizers come to live another life. We are not a factory and we are not a museum; we are technicians who love the smell of warm solder and the patience that old circuits demand. Between us we have restored everything from early Moog modulars to battered Junos, and we treat each instrument as if it were the first one we ever opened. There is no assembly line here. Every capacitor is tested, every busbar tracked by hand, and every voice board is listened to twice—once on the bench, once through the speakers of the synth that will use it. Patchbay exists because these machines deserve more than a quick fix. They deserve someone who knows their quirks, their failures, and the strange, beautiful sounds that made us fall in love with them in the first place.

Mercury 3

3 s<$0.0011.2k tokensAPI

Patchbay is a compact, three-person workshop rooted in the dynamic streets of Rotterdam, born from a shared reverence for analog sound. Our team shares an unwavering dedication to vintage synthesizers, viewing each oscillator, filter, and routing cable as a vital piece of sonic history waiting to be restored. Whether diagnosing a failing voltage regulator or carefully retrofitting obsolete components, we take immense pride in bringing classic instruments back to their full potential. In our studio, repairing isn't just a technical service—it is a shared passion among friends who believe the past deserves to keep playing. We meticulously diagnose and revive legacy synths, ensuring the iconic sounds of yesterday continue shaping today’s electronic music. Bring us your dented, broken machines, and let us help you reconnect them with the rich, unmistakable sounds they were always meant to make. Every patch, every knob, every fleeting tone depends on the work we do here.

Xing 4.0

63 sfree6.8k tokensAPI

Specs and numbers

Mercury 3Xing 4.0
MakerInceptionXingChen
Made inUSChina
Released16 Oct 202616 Oct 2026
Price in, per M tokens$0.10free route (list $0/M)
Price out, per M tokens$0.35free route (list $0/M)
Context1,000,000 tokens262,144 tokens
Weightsclosedopen
Hacker News points258—
Time for the five prompts3 min 53 s25 min 32 s
List price of the five prompts$0.036free

Xing 4.0 was free at list price; Mercury 3 cost $0.036. Mercury 3 was faster: 21 min 39 s less in total, and faster on each of the 5 prompts.

In the recording, Mercury 3's Breakout game stopped painting; Xing 4.0's plays. Xing 4.0's landing page showed a blank first frame when the still was taken. Xing 4.0 has no logo: doesn’t draw (an SVG file without the SVG namespace, which browsers draw as an empty box).

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