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Claude Sonnet 5.5 in Claude Code 2.1.280

skills off

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Poster frame of Claude Sonnet 5.5's page
Open the original page

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).

OKStillwater pondhigh effortNeutral harness

Wall time 25m 27sCost not recorded: the run's token counts were never reported, so there is no estimate

Review

No verdict yet.

The full review

OK. Finished on its own after 25.5 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, 2,431 characters. Every result for this prompt

Build "Millbrook Pond", a calm countryside pond diorama in Three.js, seen from above at a three-quarter angle. An irregular pond with soft grassy banks, rocks and reeds sits in a clearing ringed by trees and bushes, with a dirt path running around it. On one shore stands a small timber watermill cabin with a shingled roof and a stone chimney, and on its side a large wooden waterwheel turns continuously, its paddles dipping into the water and churning it. A plank dock juts out from the mill, a small arched wooden footbridge crosses an inlet, and a rowboat floats on the pond with a seated figure fishing, rod and line out; the boat bobs and drifts gently and the line's float makes small rings. The water is the star: a real-time reflective and refractive surface (a planar or render-target reflection of the mill, trees and sky; refraction of the shallow pond bed near the banks; depth-based tint from clear shallows to a dark centre) blended with a Fresnel term, soft normal-mapped wind ripples, and dynamic ripple rings from the waterwheel, the boat, the fishing float and the occasional rising fish, which spread and fade. Add gentle ambient life: swaying foliage, a few lily pads or drifting leaves, dragonflies or birds, and soft afternoon sun with shadows. The camera slowly orbits the pond on its own; the user can drag to orbit, pinch or scroll to zoom, and tap the water to make ripples, and a small unobtrusive control pauses the orbit and switches the time of day (for example afternoon and golden hour). The look is stylized and cohesive (low-poly or soft-shaded), and everything is built in code; no external models, textures or HDRIs. Also add a capture mode: opening index.html?capture=1 hides all UI and plays a scripted 12-second camera move around the pond that ends where it started, so it can be recorded as a seamless clip. Build it as index.html (plus any local asset files you create) in the current directory, with no build step; three.js and any addons may load from a pinned CDN. Aim for 60 fps on a laptop and at least 30 fps on a mid-range phone, with touch working. You may serve it locally and open it in headless chromium (/usr/bin/chromium, software WebGL, no GPU) to screenshot and inspect your own output, and iterate on your own before finishing. Close any browser you open as soon as you've taken your screenshot. Finish with a short README.md describing the controls and the capture mode.

How it was made

Wall time 25m 27sFirst artifact at 9m 15s3 saved versions

Versions saved during the run

3 intermediate outputs, in the order the model wrote them.

Version 3 of 3
  1. v1 9:17
  2. v2 21:32
  3. v3 24:13

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 4.2 MB; it is published as a scrubbed, compressed download rather than shown on the page.

Show all 56 steps

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Download the full transcript Claude Code session JSONL, 231 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

No cost figure: the run's tokens were never reported, so there is nothing to estimate from.

Tokens by typeTokens$ per 1MCost
Input (uncached)76n/an/a
Cache write182,925n/an/a
Cache read3,658,919n/an/a
Output153,704n/an/a
Total computed from tokens
unknown
Total reported by the harness
none

No harness total and no complete list-price estimate. No list price for claude-sonnet-5-5 in config/prices.json; no estimate computed.

Run notes

one prompt, agentic harness (self-review allowed)labelled re-run (of threejs_stillwater_pond__claude-code__sonnet-5-5-high)

  • frozen prompt (written): written 2026-10-02 for MR wave wa (owner request m:a155bced, after an X post of a three.js watermill pond demo; described in words, no assets or names copied); category threejs; 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: Claude Code default 200k context
  • Isolation audit: none