GPT-6 Astra in OpenCode 1.18.32
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Wall time 18m 29sCost $2.95 reported8.0/10 · Draft score — AI judge
Review
Clean, well-built lighthouse (lantern room, gallery, keeper's cottage) on a solid rocky headland with waves breaking at its foot; beam is present but faint, rain is sparse, and the teal stylised sea is a little bright for a storm.
Verdict by the AI judge (provisional).
The full review
OK. Finished on its own after 18.5 min and produced lighthouse.svg.
Bugs
- beam faint, little volumetric mist
- rain streaks sparse
- moon reflection on water weak
Scores
AI judge
8.0/10
Draft score — AI judge
Visitor votes and reviewer grades are not available yet.
| Criterion | Marks |
|---|---|
| lighthouse | 2 |
| stormy sea + moonlight | 1.5 |
| beam through rain/mist | 1.5 |
| atmosphere | 1.5 |
| craft | 1.5 |
| Total (sum of the marks) | 8 / 10 |
- 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), 378 characters. Every result for this prompt
Create an SVG of a lighthouse on a rocky headland at night: stormy sea, the lighthouse beam cutting through rain and mist, moonlight on the waves, as atmospheric and painterly as you can. Save it as lighthouse.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 8.8 MB; it is published as a scrubbed, compressed download rather than shown on the page.
Show all 35 steps
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Download the full transcript OpenCode session export, 68 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 $2.95, as reported by OpenCode (its own bill for the run). The list-price estimate from the token counts is $2.83.
| Tokens by type | Tokens | $ per 1M | Cost |
|---|---|---|---|
| Input (uncached) | 48,446 | $10.00 | $0.4845 |
| Cache read | 617,119 | $1.00 | $0.6171 |
| Output | 34,665 | $50.00 | $1.7332 |
| of which reasoning | 5,390 | billed as output |
- Total computed from tokens
- $2.8348
- Total reported by the harness
- $2.9532
- Difference
- computed 2.8348 vs harness 2.9532
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; OpenAI Standard tier, requests whose prompt is >272K tokens bill at 2x input/cache and 1.5x output (applied per request where per-request usage is logged), 2026-09-22.
Run notes
- per-request tiering: requests with a prompt above 272K tokens billed at 2x input/cache, 1.5x output
- 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