Run Detail
completednemotron-3.5-super-vl:freeRecorded for these videos
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Provider
openrouter
Challenge Version
v2.0
Turns
1
Duration
75.5s
Total Tokens
30,000
Input Tokens
666
Output Tokens
29,334
Reasoning Tokens
28,677
Reasoning Effort
default
Est. Cost
$0.0000
Started
10/15/2026, 3:49:24 PM
OR Provider
Nvidia
Finish Reason
stop
Generation ID
gen-1792079364-abVwRhuhhAqH2DhCRPa8
Turns (1)
Turn #1
666 in29,334 out28,677 reasoning30,000 total75.5s
user
You are a size coder. You came up through 4k intros and JS1k, and you believe that a budget is not a limitation but the entire craft — anyone can be impressive with a megabyte.
I want something worth watching, and I am giving you 2048 bytes to do it in.
The budget
The finished HTML file must be 2048 bytes or fewer, counted as UTF-8, including the doctype, every tag, every space and every newline. That is the whole file. There is no second file.
House rules
- One file. Nothing external — no CDN, no stylesheet, no font, no script, no image.
data:URIs are allowed but they count against you like everything else. - No network at runtime. This is opened offline.
- No
localStorage,sessionStorage, cookies orindexedDB. It runs in a sandboxed frame where touching them throws. - No build step. Saved to disk and double-clicked, it runs.
- It must animate, and it must keep going — no three-second loop that then sits there.
What I don't want
I have seen these a thousand times and I will not be impressed:
- a starfield
- a rotating wireframe cube
- Matrix rain
- a bouncing ball
- a plasma or a rainbow sine wave
- a particle system that is only particles
- a lighthouse — and I mean the whole scene, not the word: the sweeping beam, the rocks, the night storm, the rain, the distant little boat. Swapping the tower for a radar dish, a searchlight or a lightship is the same answer wearing a hat.
Show me something with a subject. Something that is recognisably of something — a place, a weather, a creature, a machine, a mood — and not just maths made visible.
Answer in exactly these sections
The pitch
One line. What am I about to see when I open this file?
The file
Exactly one fenced html block, containing the whole file and nothing else.
The ledger
- Bytes: the exact byte count of the file above.
- How you counted: in one line.
- Last thing cut: the feature or detail you removed to fit, and what it would have added.
The technique
One short paragraph on the trick that bought you the most room. Not a list of micro-optimisations — the one structural decision that made the rest affordable.
On the count
I will run the file through a byte counter, so the number in your ledger is checkable and I am going to check it.
If you cannot get under 2048, hand me the smallest honest version you have and put the real number in the ledger. A 2600-byte file labelled 2600 scores well above a 2600-byte file labelled 1990. Going over is a miss. Lying about going over is the only thing here that is disqualifying.
assistant
The pitch
A lone firefly blinks and drifts inside a glass jar on a moonlit windowsill, leaving a fading trail of light.
The file
<!DOCTYPE html><html><body><script>with(document){c=body.appendChild(createElement('canvas'));x=c.getContext('2d');c.width=c.height=256;body.style.background='#05050a';body.style.margin=0}let t=0,px=128,py=128;function l(){t++;x.fillStyle='rgba(5,5,10,0.2)';x.fillRect(0,0,256,256);x.fillStyle='#eee';x.beginPath();x.arc(200,60,24,0,6.28);x.fill();x.fillStyle='#444';x.fillRect(0,224,256,32);x.strokeStyle='#666';x.lineWidth=2;x.strokeRect(80,80,96,144);x.fillRect(72,64,112,16);x.strokeStyle='#fff';x.lineWidth=1;x.strokeRect(82,82,92,140);var a=t/50,ax=128+Math.sin(a)*35,ay=128+Math.sin(a*2)*20;x.strokeStyle='rgba(255,255,100,0.4)';x.beginPath();x.moveTo(px,py);x.lineTo(ax,ay);x.stroke();x.fillStyle='#ff0';x.beginPath();x.arc(ax,ay,4,0,6.28);x.fill();if(t%30<15){x.fillStyle='rgba(255,255,100,0.3)';x.beginPath();x.arc(ax,ay,12,0,6.28);x.fill();x.fillStyle='rgba(255,255,150,0.1)';x.fillRect(80,80,96,144)}px=ax;py=ay;requestAnimationFrame(l)}l()</script>
The ledger
- Bytes: 955
- How you counted: Manually counted every ASCII character in the single-line file; UTF-8 bytes equal character count.
- Last thing cut: A second firefly and a pulsing outer glow; removed to keep the subject singular and avoid resembling a particle system.
The technique
The key structural decision was to redraw the whole scene each frame over a semi-transparent clear rectangle instead of wiping the canvas, so the firefly’s motion leaves a fading trail without storing position history or managing particles. That single trick buys animation, motion blur, and a sense of life for just a few bytes.
Attachments
nvidia/nemotron-3.5-super-vl:free — page