Claude Fable 5.1 in Claude Code 2.1.280
skills off
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Showing a WebP render of the 233 KB SVG so the page loads fast; zooming loads the SVG itself.
Wall time 39m 42sCost $12.27 reported9.5/10 · Draft score — stored total; criterion breakdown unavailable
Review
Polished autumn town "Harvest Hollow" on a floating slab: a <defs> sprite set reused 120 times, 30+ buildings (church, town hall, watermill, barn, water tower, greenhouse), a fountain square, lanes, autumn trees, and a river with two bridges spilling off the edge, all in one warm palette. Minor: in the middle, the river is partly hidden behind the waterfront buildings, so its course and the second bridge read less clearly.
Verdict by the AI judge (provisional).
The full review
OK. Finished on its own after 39.7 min and produced town.svg.
Bugs
- river course partly hidden behind waterfront buildings
Scores
AI judge
9.5/10
Draft score — stored total; criterion breakdown unavailable
Visitor votes and reviewer grades are not available yet.
Draft score — stored total; criterion breakdown unavailable. the per-criterion marks could not be read, so the stored score is shown; the displayed total has not been verified through a criterion breakdown.
- 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. A draft score until the reviewer checks it. Rubric: Wave-1 SVG scoring rubric (AI Model Reviewer).
- 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
agentic harness (save the file; self-render allowed), 401 characters. Every result for this prompt
Create an isometric SVG town: first design a small sprite sheet of distinct buildings (in <defs>), then place 20+ of them on an isometric grid with roads, trees, a river and a bridge. Pick your own theme and palette. Save it as town.svg in the current directory. You may render and inspect your own output (headless chromium is available at /usr/bin/chromium) and iterate on your own before finishing.
How it was made
Versions saved during the run
4 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 6.8 MB; it is published as a scrubbed, compressed download rather than shown on the page.
Show all 38 steps
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Download the full transcript Claude Code session JSONL, 118 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 $12.27, as reported by Claude Code (its own bill for the run). The list-price estimate from the token counts is $12.25.
| Tokens by type | Tokens | $ per 1M | Cost |
|---|---|---|---|
| Input (uncached) | 868 | $10.00 | $0.0087 |
| Cache write | 212,330 | $12.50 | $2.6541 |
| Cache read | 3,237,704 | $0.25 | $0.8094 |
| Output | 175,642 | $50.00 | $8.7821 |
| of which reasoning | not recorded | billed as output |
- Total computed from tokens
- $12.25
- Total reported by the harness
- $12.27
- Difference
- computed $12.25 vs reported $12.27 (diff -0.02)
Tokens summed from the Claude Code session JSONL (per message id, incl. subagent files); harness total from /cost.
Prices: Project price table (vendor list prices); cache write 1.25x input, 2026-09-22.
Run notes
- Mode: interactive TUI in tmux (160x48), inside bubblewrap sandbox
- Isolation: bwrap: private /tmp, HOME and TMPDIR inside run dir, own CLAUDE_CONFIG_DIR/CODEX_HOME copy; the project files, other runs, /tmp/hx_* not mounted