google-vertex · one-shot

gemini-4-argon-high

Harness: Antigravity CLI
Version: 1.4.2
Effort: high

Rendered output

Preview is stopped. Starting it executes generated code.

Screenshot of gemini-4-argon-high output

Preview safety and restrictions

Restricted preview policy restricted-html-v1. A blank result is not an automatic pass or failure. Restrictions may affect the output.

Generated scripts can consume CPU or navigate their own frame. Curator review is required. Stop cannot reliably recover a blocked browser.

Curator's read

What stands out

A detailed read of this attempt's approach, distinctive choices, and lessons for future runs.

Despite running inside a coding-agent harness, the model completed the challenge in a single zero-tool turn and returned raw HTML without markdown fences or prose.
The 1,630-line (58,361-byte) response uses a 3-layer hybrid architecture: a background 2D canvas for parallax scenery, an articulated inline SVG rig for the capybara and hoverboard, and a foreground 2D canvas for particle effects.
Both canvases replicate the SVG 1200x750 viewBox aspect-ratio transform on resize so exhaust particles and repulsor rings stay aligned with the vector hoverboard.
Animation includes harmonic hover oscillation, velocity-coupled board pitch, spring-damper physics on a stackable yuzu, dynamic scarf path morphing, autonomous trick timers, and keyboard, pointer, and button controls across three color themes.
The response is self-contained with no external assets, libraries, fonts, network calls, or audio, and uses Math.random for scenery, particles, and autonomous trick timing.
Recorded usage totals 37,171 tokens (8,952 input, 0 cached, and 28,219 output including 5,200 thinking tokens); model time is null because the session records thinking duration and step timestamps rather than assistant durationMs.

Inspect the evidence

Challenge and protocol ↗

The curator reports this collected series is fully published.

Exact user instructions

User turn 1

Build an animated capybara riding a hoverboard using only HTML, CSS, and JavaScript.

Deliver a single self-contained HTML file with all CSS and JavaScript inline. Do not use external libraries, external image assets, external fonts, or network requests. Inline SVG, CSS drawing, and canvas are allowed.

The result should visibly show a capybara riding a hoverboard, with animation that makes the scene feel alive. Do not include audio.

Return only the HTML source, without explanations or Markdown code fences.

Full recorded transcript

Run provenance

Run ID: agy-9642fe00-2f77-454f-a988-17aecf3d1825-capybara-hoverboard-v1
Provider: google-vertex
Model identifier: gemini-4-argon-high
Identifier kind: unknown
Generated: 2026-10-20T03:08:41Z
Published: 2026-10-20T03:43:11Z
Generation mode: one-shot
Interface: coding-agent
Tools used: no
Challenge: capybara-hoverboard-v1
Series: agy-series-9642fe00-2f77-454f-a988-17aecf3d1825
Attempt: 1

Open recorded run metadata

Capture conditions

{
  "path": "thumbnails/agy-9642fe00-2f77-454f-a988-17aecf3d1825-capybara-hoverboard-v1.png",
  "viewport": {
    "width": 640,
    "height": 480
  },
  "capture_delay_ms": 1000,
  "browser_version": "156.0.8078.4",
  "preview_policy_version": "restricted-html-v1"
}

The curator's read above contains observations, not scores. Null capture metadata means unknown.

Original response

Expand to retrieve the preserved artifact.

Extracted HTML

Expand to retrieve the preserved artifact.