Fluid simulation · gpt-6.1-sol

Output generated Cost / run $0.1355 Runtime 258.5s

Prompt for this run

Create a real-time fluid simulation on a full-screen canvas where dragging the mouse pushes swirling colored dye through the fluid.

⛨ sandboxed Open in new tab ↗

TAKE IT TO CODE

A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.

RUN

modelgpt-6.1-sol

vendorOpenAI

harnesspi 0.87.1 · browser iteration

generated2026-10-05

METRICS

runtime258.5s

tokens in130k

tokens out7.9k

cached112k

cost / run$0.1355

Transcript · 23 messages

system

user

Create a real-time fluid simulation on a full-screen canvas where dragging the mouse pushes swirling colored dye through the fluid.

assistant

thinking

**Developing a GPU Simulation**

I need to create a fluid GPU WebGL simulation that's beautiful and self-contained. The UI should have tasteful controls and minimal overlays to enhance immersion. I'm planning to implement stable fluid shaders on WebGL1 with half-float support and necessary extensions, while ensuring fallback options. I need to verify the robustness of texture rendering with half-float formats. The UI will feature labels, status controls, and advanced palettes. A fullscreen option will be available in the top right.**Creating a Fluid Visual Demo**

I want to design a fluid visual demo with continuously moving seeded swirls that will stop when dragged. To start, I’ll inject moving sources for the initial seconds and toggle an ambient setting to keep things lively by default. The fluid velocity should create plausible splats. I plan to use a bloom shader for a glowing dye effect while ensuring the colors are vibrant. I need to achieve a performance-friendly simulation with full-color saturation and film grain. A screenshot for inspection will also be necessary.

I’ll build a full-screen, interactive fluid canvas with luminous dye, smooth swirling motion, and a few unobtrusive controls.

→ write index.html (19855 bytes)

toolResult

Successfully wrote to index.html

assistant

→ browser {"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}

toolResult

page.screenshot: Timeout 5000ms exceeded. Call log: - taking page screenshot - waiting for fonts to load... - fonts loaded

assistant

→ browser {"action":"inspect","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","warning: [.WebGL-0x186c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels","warning: [.WebGL-0x186c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels","warning: [.WebGL-0x186c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels","warning: [.WebGL-0x186c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels (this message will no longer repeat)"],"dom":"FLUX\nA FLUID PLAYGROUND\nLIVE SIMULATION\nA LITTLE CHAOS. A LOT OF COLOR.\nGo with the flow.\n\nDrag to stir. Let color wander.\nNo rules, just a little fluid physics.\n\nClick & drag to make waves\nSpace to pause · R to start fresh\nPALETTE\nFORCE\nAmbient\nMOVE. MIX. MAKE SOMETHING.","images":"attached"}

assistant

thinking

**Considering software issues**

I'm noticing that the performance software's timeout resolution is expensive, and I want to ensure everything looks good with it. I need to think about doing a test drag to evaluate its performance more effectively. It's essential to get this right, so I'm questioning if there's a better way to handle the timeout resolution or if testing it will provide enough clarity without incurring extra costs. Let's explore those options!

→ browser {"action":"drag","x":495,"y":420,"toX":900,"toY":380,"text":"","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

thinking

→ browser {"action":"click","x":803,"y":747,"toX":0,"toY":0,"text":"","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","warning: [.WebGL-0x186c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels","warning: [.WebGL-0x186c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels","warning: [.WebGL-0x186c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels","warning: [.WebGL-0x186c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels (this message will no longer repeat)"],"dom":"FLUX\nA FLUID PLAYGROUND\nSIMULATION PAUSED\nA LITTLE CHAOS. A LOT OF COLOR.\nGo with the flow.\n\nDrag to stir. Let color wander.\nNo rules, just a little fluid physics.\n\nClick & drag to make waves\nSpace to pause · R to start fresh\nPALETTE\nFORCE\nAmbient\nMOVE. MIX. MAKE SOMETHING.\nTaking a breather","images":"attached"}

assistant

thinking

**Improving rendering performance**

I want to enhance the frame rate independence for my ambient effect by considering the seed and frame count along with decay. It seems I need a dt*60 multiplier for ambient. Starting with 100 seeds feels good, but I could adjust to 70 for balance. The current ambient seems to last about a minute, with a half-life influencing density. I’ve realized pausing render every frame is unnecessary, but I can manage it. Also need to ensure my boolean setup is working correctly. Alright, let's keep going!

→ edit

{"path":"index.html","edits":[{"oldText":".toast{position:absolute;","newText":".top,.intro,.hint,.footer{text-shadow:0 2px 12px #000,0 1px

toolResult

Successfully replaced 3 block(s) in index.html.

assistant

→ browser {"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}

toolResult

page.screenshot: Timeout 5000ms exceeded. Call log: - taking page screenshot - waiting for fonts to load... - fonts loaded

assistant

→ browser {"action":"click","x":442,"y":746,"toX":0,"toY":0,"text":"","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","warning: [.WebGL-0x56c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels","warning: [.WebGL-0x56c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels","warning: [.WebGL-0x56c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels","warning: [.WebGL-0x56c00179e00]GL Driver Message (OpenGL, Performance, GL_CLOSE_PATH_NV, High): GPU stall due to ReadPixels (this message will no longer repeat)"],"dom":"FLUX\nA FLUID PLAYGROUND\nLIVE SIMULATION\nA LITTLE CHAOS. A LOT OF COLOR.\nGo with the flow.\n\nDrag to stir. Let color wander.\nNo rules, just a little fluid physics.\n\nClick & drag to make waves\nSpace to pause · R to start fresh\nPALETTE\nFORCE\nAmbient\nMOVE. MIX. MAKE SOMETHING.\nEmber · warm & electric","images":"attached"}

assistant

→ browser {"action":"click","x":845,"y":746,"toX":0,"toY":0,"text":"","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

→ browser {"action":"drag","x":450,"y":480,"toX":780,"toY":280,"text":"","delta":0}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

assistant

Created **index.html** — a self-contained, full-screen WebGL fluid simulation. - Drag with mouse or touch to stir colorful dye - Three color palettes and adjustable force - Ambient flow, pause, clear, and fullscreen controls - **Space** to pause · **R** to clear Tested drawing, palette switching, pause, and reset in the browser. No external resources required.