Claude Opus 5.5 in Claude Code 2.1.280
skills off
Zoom, inline player and more ways to view
The model's own page, run in a sandboxed frame only when you ask (a page that needs its own origin opens in a new tab on a separate demo site). Phones get a full-screen player capped at 1.5x pixel density (2x on larger screens) so it stays smooth; the original page runs uncapped. It starts in its auto-tour (T switches to play mode on a keyboard).
Wall time 30m 07sCost $3.50 estimated
Review
No verdict yet.
The full review
OK. Finished on its own after 30.1 min.
Scores
AI judge
Not scored
No rubric for this prompt
Visitor votes and reviewer grades are not available yet.
- AI judge
- AI judge: the test runner (model claude-opus-5-5), scoring by visual review of the 1600 px render against the pre-registered rubric. No AI-judge score exists for this result: there is no rubric for this prompt, so no score is shown and none is made up.
- Visitors
- Public voting with a blind reveal is coming: you score the output first, then see the other scores.
- Reviewer
- The reviewer's own grade appears here once it is added.
Scores compare results for the same prompt only. AI-judge boards rank runs within one prompt, equal totals sharing a rank; scores from different prompts are never averaged.
Downloads
Files actually published for this run. Original output, site-made previews and post-run conversions are labelled separately.
The exact prompt
as run, 777 characters. Every result for this prompt
Create a seamless looping side-view animation of a red fox running through a forest at dusk. Deliver ONE self-contained index.html (inline CSS and JavaScript only, SVG and/or canvas; no external assets, libraries, fonts or network requests of any kind). The fox runs left to right, seen in profile, with an animated running gait: legs, body, head and tail all move in a believable run cycle. The scene moves past it: a dusk sky, several layers of trees scrolling at different speeds for parallax depth, and a ground strip. One loop lasts about 8 seconds and repeats forever with no visible seam or jump. Frame the scene at 16:9, scaled to fit any window, and make it look good on desktop and phone. Write everything into the working directory and finish with a short README.md.
How it was made
Versions saved during the run
6 intermediate outputs, in the order the model wrote them.
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 7.0 MB; it is published as a scrubbed, compressed download rather than shown on the page.
Show all 43 steps
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Download the full transcript Claude Code session JSONL, 108 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 $3.50, estimated from the token counts at list price.
| Tokens by type | Tokens | $ per 1M | Cost |
|---|---|---|---|
| Input (uncached) | 52 | $4.00 | $0.0002 |
| Cache write | 164,869 | $5.00 | $0.8243 |
| Cache read | 3,217,780 | $0.20 | $0.6436 |
| Output | 101,553 | $20.00 | $2.0311 |
| of which reasoning | 63,351 | billed as output |
- Total computed from tokens
- $3.4992
- Total reported by the harness
- none
Computed from harness-reported token counts x list prices.
Prices: Project price table (vendor list prices), 2026-09-22.
Run notes
- frozen prompt (written): prompts/html_fox_forest_run.md verbatim (written 2026-10-01 from a public X post x.com/srikanthvaluri/status/2105278940906668233: fox running through a forest, Opus 5.5 / Sonnet 5.5 / GPT-6.1 Sol / GPT-6 Sol grid; the post's prompt is not public, so this is our own; zero results)
- plain wave-1-equivalent cc_config copy (settings.json + .claude.json; no ECC files)
- Mode: interactive TUI in tmux (160x48), inside bubblewrap sandbox
- Context setting: 1M ([1m] model name)
- Isolation audit: none