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Claude Fable 5.1 in Claude Code 2.1.283

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Rendered video (by the agent)

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Rendered video (by the agent). This is the finished MP4 saved in the run. Played from a 720p web copy made by this site from the agent's out.mp4; the original file is too large for this host and is kept unchanged on the runs branch. Download video (13.3 MB).

OKBacterium to quantum zoommax effortHome harness

Wall time 56m 22sCost $15.29 reported

Review

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The full review

OK. harness exited rc=0 on its own

Scores

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The exact prompt

as run, 1,806 characters. Every result for this prompt

Make a 30-60 second animated video: one continuous zoom journey that starts on a single bacterium cell and keeps zooming in until it reaches the quantum fields the cell is ultimately made of.

The zoom passes through these scale levels, in this order:
1. the whole bacterium cell
2. the cell's internal structures (ribosomes, the coiled DNA of the nucleoid, the cell membrane)
3. molecules (for example the DNA double helix and proteins)
4. atoms
5. the nucleus of one atom
6. protons and neutrons
7. quarks and gluons, and finally the quantum fields they are excitations of

Requirements:
- One continuous shot: each level grows smoothly out of the previous one as the camera keeps zooming in; no hard cuts between levels.
- An on-screen label for every scale level with its name and approximate size (for example "Bacterium · ~2 µm"), shown while the journey passes through that level.
- Length between 30 and 60 seconds, 16:9 at 1920x1080.
- Sound: if you can make audio in this environment, give the video an original score or soundtrack that you create yourself (for example synthesized in code) and that follows the journey; do not use existing music. If you cannot make audio, leave the video silent and say so in your final message; a silent video is acceptable.

Remotion 4.0.527 is already installed for you in the current directory: node_modules is pre-installed and read-only, so do not run npm install or create-video, and a remotion.config.ts here already points rendering at the local Chromium. Render the final video yourself to out.mp4 in the current directory (for example npx remotion render <entry file> <composition id> out.mp4). You may render stills or frames and inspect your own output (headless chromium is available at /usr/bin/chromium) and iterate on your own before finishing.

How it was made

Wall time 56m 22s

Step by step

The prompt, every agent turn and tool call (tool name and a one-line summary; inputs and outputs are not shown), then the final message. The full transcript is 4.9 MB; it is published as a scrubbed, compressed download rather than shown on the page.

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Download the full transcript Claude Code stream JSON, 100 KB, gzip. Scrubbed: anything that looks like a key, token, e-mail address or phone number is replaced, and account details and the test machine's file paths are removed.

Cost breakdown

Headline cost $15.29, as reported by Claude Code (its own bill for the run). The list-price estimate from the token counts is $15.29.

Tokens by typeTokens$ per 1MCost
Input (uncached)1,031$10.00$0.0103
Cache write368,301$12.50$4.6038
Cache read3,523,558$0.25$0.8809
Output195,978$50.00$9.7989
Total computed from tokens
$15.29
Total reported by the harness
$15.29
Difference
matches

No cost.json: computed by ingest from the token counts in meta.json x list price.

Prices: Project price table (vendor list prices), 2026-09-22.