Claude Fable 5.1 in OpenCode 1.18.32
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Showing a WebP render of the 269 KB SVG so the page loads fast; zooming loads the SVG itself.
Wall time 39m 11sCost $13.67 reported10.0/10 · Draft score — stored total; criterion breakdown unavailable
Review
Showcase Nordic autumn river town "Bjørkelva": 15 building symbols in <defs>, shown as a labelled sprite sheet and placed 24 times on a true 2:1 isometric slab with clean back-to-front ordering.
The full review
Showcase Nordic autumn river town "Bjørkelva": 15 building symbols in <defs>, shown as a labelled sprite sheet and placed 24 times on a true 2:1 isometric slab with clean back-to-front ordering. It has a winding river with a wooden bridge and boats, a water mill, a windmill, a market stalls square, birch and pine trees, sheep and lamps, all in one restrained Scandinavian palette with elegant typography. No visible glitches.
Verdict by the AI judge (provisional).
OK. Finished on its own after 39.2 min and produced town.svg.
Scores
AI judge
10.0/10
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
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 6.3 MB; it is published as a scrubbed, compressed download rather than shown on the page.
Show all 107 steps
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Download the full transcript OpenCode session export, 83 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 $13.67, as reported by OpenCode (its own bill for the run). The list-price estimate from the token counts is $13.67.
| Tokens by type | Tokens | $ per 1M | Cost |
|---|---|---|---|
| Input (uncached) | 112 | $10.00 | $0.0011 |
| Cache write | 307,567 | $12.50 | $3.8446 |
| Cache read | 6,989,475 | $0.25 | $1.7474 |
| Output | 62,771 | $50.00 | $3.1385 |
| reasoning | 98,764 | $50.00 | $4.9382 |
- Total computed from tokens
- $13.67
- Total reported by the harness
- $13.67
- Difference
- computed 8.7316 vs harness 13.6698
Tokens from OpenCode per-message usage; harness total = sum of OpenCode per-message cost. OpenCode reports reasoning separately; both bill at the output rate (output line here = output only, see reasoning).
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 and /run, private PID ns; only this run dir, harness binaries (ro), opencode config, /usr, /etc bound; HOME/TMPDIR/XDG data private; the project files and other runs not mounted