Run Detail
completedgpt-5.6-sol-proRecorded for these videos
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Provider
openrouter
Challenge Version
v2.0
Turns
1
Duration
Batched — not timed
Total Tokens
69,595
Input Tokens
35,713
Output Tokens
33,882
Reasoning Tokens
31,025
Reasoning Effort
medium
Est. Cost
$0.2988
Started
8/21/2026, 6:53:01 AM
OR Provider
OpenAI
Finish Reason
stop
Generation ID
gen-batch-1787295181-0ff37725aae418d5573c
Turns (1)
Turn #1
35,713 in33,882 out31,025 reasoning69,595 total
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 rain-soaked midnight ramen shop, where a cook works behind steamed glass and a cat shelters beneath the awning.
The file
<!doctype html><style>body{margin:0;overflow:hidden;background:#02050a}</style><canvas id=c><script>x=c.getContext`2d`;onresize=_=>{c.width=innerWidth;c.height=innerHeight};onresize();R=(a,b,d,e)=>x.fillRect(a,b,d,e);A=(a,b,r)=>{x.beginPath();x.arc(a,b,r,0,7);x.fill()};C=s=>x.fillStyle=s;f=t=>{requestAnimationFrame(f);t/=1e3;with(x){setTransform(c.width/600,0,0,c.height/400,0,0);C('#07111d');R(0,0,600,400);C('#111923');R(0,285,600,115);C('#21181b');R(72,52,456,255);C('#090b10');R(63,45,474,18);C('#b33732');R(95,91,378,34);for(i=0;i<9;i++){C(i%2?'#e7c6a1':'#9f292b');R(95+i*42,91,22,34)}globalAlpha=.72+.08*Math.sin(t*7);C('#e28b3f');R(108,125,350,137);globalAlpha=1;C('#3a2020');R(108,240,350,22);R(273,125,8,137);C('#17151a');R(80,262,425,45);C('#e8d8b0');font='bold 18px sans-serif';fillText('NIGHT NOODLES',176,82);C('#c72f35');R(466,102,48,128);C('#ffe2a0');font='bold 13px sans-serif';save();translate(498,113);rotate(1.57);fillText('RAMEN',0,0);restore();C('#25171a');A(345,172,18);R(326,188,39,52);C('#eee0c5');R(331,194,29,43);strokeStyle='#25171a';lineWidth=7;beginPath();moveTo(354,200);lineTo(392+8*Math.sin(t*2),220);stroke();lineWidth=3;beginPath();moveTo(397,218);lineTo(397,178);stroke();A(397,178,7);C('#f6d18a');R(185,224,55,8);C('#fff3d0');A(212,224,10);globalAlpha=.35;for(i=0;i<6;i++)A(205+i*7+5*Math.sin(t+i),210-i*7,3+i/3);globalAlpha=1;C('#07090d');beginPath();ellipse(145,281,35,16,0,0,7);fill();A(116,266,14);beginPath();moveTo(105,257);lineTo(109,242);lineTo(117,254);lineTo(126,242);lineTo(128,260);fill();strokeStyle='#07090d';lineWidth=8;beginPath();moveTo(173,280);quadraticCurveTo(195,265,181,250);stroke();C('#e6bd58');if(t%4<3.7){A(112,265,2);A(121,265,2)}globalAlpha=.3;for(i=0;i<7;i++){C(i%2?'#d43b3f':'#df9147');R(100+i*70+10*Math.sin(t+i),310,28,70-i*5)}globalAlpha=1;strokeStyle='#8ba4b5';lineWidth=1;globalAlpha=.55;beginPath();for(i=0;i<75;i++){a=(i*83+t*170)%650;b=(i*47+t*270)%430;moveTo(a,b);lineTo(a-5,b+14)}stroke();globalAlpha=1}};requestAnimationFrame(f)</script>
The ledger
- Bytes: 2016
- How you counted: UTF-8 byte count of the code-block contents; every character in the file is ASCII and therefore one byte.
- Last thing cut: Puddle ripples beneath the reflections, which would have made the rain visibly disturb the street.
The technique
The biggest saving was treating the scene as a fixed 600×400 stage and scaling the canvas transform to the viewport. Every subject, gesture, raindrop and reflection can then use short integer coordinates, while tiny rectangle, circle and colour helpers keep the recognisable shop assembled from very cheap primitives.
Attachments
openai/gpt-5.6-sol-pro — page