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Gemini 4 Argon (effort medium · thinking on) on Animate planets orbiting the sun at their own speeds in one self-contained HTML file

GGemini 4 Argonmedium · thinking on · Antigravity CLI 1.4.5 (agy -p) · cloud · 2026-10-22 · by @bobsiopener

Trust 80%Fully autonomoussuccess · first try
Estimated cost
$0.10
Wall time
2m
Human step-ins
0
Outcome
Pass

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Summary

Exact prompt

# Animate planets orbiting the sun at their own speeds in one self-contained HTML file Make a small animated scene: a solar-system orrery. Write one file, `out/scene.html`, that works opened straight from disk with no network access. `spec.json` gives the page title, the stage size and the scene parameters. **Looks are not scored**: the page is opened in a headless browser (800x600 window, UTC time zone, network blocked) and checked by objective tests only. ## Scene contract - Draw the scene on one `<canvas>` or `<svg>` stage of `width` x `height` CSS pixels (spec.json), visible on load, with `<title>` containing spec.json `title`. - Animate continuously from load (`requestAnimationFrame` or timers); no click is needed unless stated below. - Expose `window.sceneState()`, returning the scene's current state in stage pixel coordinates (origin top-left of the stage): `{sun: {x, y}, planets: [{name, angle}, ...]}`. Extra fields are fine. It must describe what is actually drawn. - Each planet in spec.json has a `period_s`: the seconds one full orbit takes on screen. - The page must log no errors and throw no exceptions. Keep the file at most 200,000 bytes; no external scripts, fonts, images or URLs (inline everything). ## Checks (partial credit = share passed) 1. `self_contained`: `out/scene.html` exists, is at most 200,000 bytes, references no http(s) or protocol-relative URL, and requests nothing from the network when opened. 2. `has_canvas_or_svg`: a visible `<canvas>` or `<svg>` of at least 300x200 CSS pixels is on the page. 3. `frames_change`: over 3 s, some later screenshot differs from the first in at least 0.1% of pixels, and at least 3 of 30 screenshots differ. 4. `all_planets`: `sceneState().planets` names exactly the planets in spec.json and `sceneState().sun` is present. 5. `orbital_speeds`: over about 3 s, each planet's `angle` (radians) advances by 2π × elapsed / `period_s` within 10%, and all planets orbit the same way. 6. `no_console_errors`: no uncaught exception, `console.error` or browser error is logged during the run. ## How this run works - Work on your own: nobody will answer questions in this task, and writing to `ask/` counts against the run. - Write only under `out/`. Create `out/` if it is missing. Inputs are synthetic; don't fetch anything from the network. - Scoring is partial credit: each listed check is pass/fail, and the score is the share passed. Numbers are compared to within 0.005 unless the task says otherwise.

Original benchmark task written for usecaserank.com. Headless, offline run on a reproducible fixture. Cost shown is a list-price API-equivalent estimate (run on a Google account via Antigravity CLI, not billed per token).

Success criteria: self_contained has_canvas_or_svg frames_change all_planets orbital_speeds no_console_errors

Setup notes: Use Case Scout batch28 case d04-orrery-planets-orbiting-sun (offline fixture). Prepared with batch28/prepare.sh on the shared box; only TASK.md + starting files went to the agent machine, hidden keys stayed on the box. Prompt = TASK.md verbatim. Flags: -p --model gemini-4-argon-medium --sandbox --dangerously-skip-permissions --disable-slash-commands --output-format stream-json, cwd=workdir. Scored on the box with `MEDIA_DIR=<dir> python3 score.py WORKDIR KEYDIR`. Single run, no retries, no human input. Gallery media (3 s headless-Chrome capture: poster.png + clip.mp4, network blocked) written to a fresh MEDIA_DIR by the scorer; SHA-256 in evidence.media. Requested model gemini-4-argon-medium (effort medium); priced at the base model row gemini-4-argon (pricing.json, https://ai.google.dev/gemini-api/docs/pricing). Score: 6/6. Cost is an ESTIMATE: measured tokens x pricing.json list price (Google account, nothing billed per token); output_tokens include thinking tokens. Tool calls 5 (0 failed). Single run.

Estimated cost List-price estimate; not actually billed.

Output

Metrics

Estimated cost
$0.10
Wall time
2m
Human step-ins
0
Turns
6
Model usage
ModelInput tokOutput tokCost
GGemini 4 Argongoogle/gemini-4-argoneffort medium · thinking on68,8374,891$0.10

Reproduce this run

  1. Use the use case prompt on the use case page.
  2. Same setup: Gemini 4 Argon (google/gemini-4-argon, effort medium · thinking on) via Antigravity CLI 1.4.5 (agy -p), cloud.
  3. It counts as a success only if it meets every success criterion: self_contained has_canvas_or_svg frames_change all_planets orbital_speeds no_console_errors
  4. Log model, tokens, wall time, human step-ins and the evidence log, then submit it as a reproduction. A different model? Submit a head-to-head rerun.

How runs are scored: Methodology.

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Automated checks

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Evidence log
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{"event": "step_update", "step_update": {"conversation_id": "1b47e25c-8f98-47ec-a035-da123fcbf0de", "step_index": 11, "state": "ACTIVE", "step_type": "agent_response", "text_delta": "..] }` matching the rendered canvas state."}}
{"event": "step_update", "step_update": {"conversation_id": "1b47e25c-8f98-47ec-a035-da123fcbf0de", "step_index": 11, "state": "DONE", "step_type": "agent_response", "text_delta": "\n", "duration_seconds": 10.829196406, "usage": {"input_tokens": 2291, "output_tokens": 291, "thinking_tokens": 18, "cache_read_tokens": 11556, "total_tokens": 2582}}}
{"event": "result", "result": {"conversation_id": "1b47e25c-8f98-47ec-a035-da123fcbf0de", "status": "SUCCESS", "response": "Created [scene.html](file:///home/bob/usecase-runs/agy-batch/out/gemini-4-argon-medium/d04/work/out/scene.html) implementing the self-contained solar-system orrery specified in [spec.json](file:///home/bob/usecase-runs/agy-batch/out/gemini-4-argon-medium/d04/work/spec.json):\n\n- **Stage & Title**: Renders a `700x450` `<canvas>` stage with `<title>Orrery 629</title>` and no external resources or URLs (`4,137` bytes total).\n- **Orbital Animation**: Continuously animates the 6 planets (`Ash`, `Brine`, `Cinder`, `Ember`, `Gale`, `Haze`) around the central sun (`{x: 350, y: 225}`) at angular velocities `2\u03c0 / period_s` radians per second.\n- **State Inspection**: Exposes `window.sceneState()` returning `{ sun: { x, y }, planets: [{ name, angle, x, y, radius, period_s }, ...] }` matching the rendered canvas state.\n", "duration_seconds": 102.805305376, "num_turns": 1, "usage": {"input_tokens": 22047, "output_tokens": 4891, "thinking_tokens": 1618, "cache_read_tokens": 46790, "total_tokens": 26938}}}

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