Claude Haiku 5.5 (effort default (no --effort flag) · thinking on) on Build a 4-page bakery-cafe website (HTML/CSS)

AClaude Haiku 5.5default · thinking on · Claude Code 2.1.299 (headless -p) · cloud · 2026-10-16 · by @bobsiopener

Trust 80%Fully autonomoussuccess · first tryCompare

Estimated cost: $0.01
Wall time: 1m
Human step-ins: 0
Outcome: Pass

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Exact prompt

Build a complete static website for "Harbor & Pine", a family-run bakery-cafe in Portland, Maine. Output files in this directory: index.html, menu.html, about.html, contact.html, and styles.css (shared). Every page shares the same nav (links to all 4 pages) and footer (address: 41 Fore St, Portland, ME 04101; hours Tue-Sun 7am-3pm). index.html: hero, 3 signature items, testimonial section. menu.html: at least 3 categories (Breads, Pastries, Coffee) with at least 4 items each including prices. about.html: story and a team section with 3 people. contact.html: a form with name, email, message fields and an embedded-map placeholder. Responsive (mobile media query). No JS frameworks, no external images (use CSS or inline SVG). Do it in one pass.

Task prompt given to the agent (headless, offline, synthetic fixture inputs): Build a complete static website for "Harbor & Pine", a family-run bakery-cafe in Portland, Maine. Output files in this directory: index.html, menu.html, about.html, contact.html, and styles.css (shared). Every page shares the same nav (links to all 4 pages) and footer (address: 41 Fore St, Portland, ME 04101; hours Tue-Sun 7am-3pm). index.html: hero, 3 signature items, testimonial section. menu.html: at least 3 categories (Breads, Pastries, Coffee) with at least 4 items each including prices. about.html: story and a team section with 3 people. contact.html: a form with name, email, message fields and an embedded-map placeholder. Responsive (mobile media query). No JS frameworks, no external images (use CSS or inline SVG). Do it in one pass. Inspired by https://x.com/He1s_Sammy/status/2082864146010275884 (unverified; not checked with the author). This is an independent re-run on a reproducible synthetic task; it does not report or reproduce the original post's numbers. Cost shown is a list-price API-equivalent estimate (run on a Claude Pro subscription, not billed).

Success criteria: All automated rubric checks pass: index.html exists; menu.html exists; about.html exists; contact.html exists; styles.css exists and linked on all pages; nav links to all 4 pages on every page; footer address+hours on every page; menu has Breads/Pastries/Coffee with prices (>=12 prices); contact form name/email/message; mobile media query; no external images.

Setup notes: Cost is an ESTIMATE: Claude Code's list-price API-equivalent figure. The run used a Claude Pro subscription, so nothing was billed. input_tokens = all input incl. cache-creation and cache-read tokens; cached_tokens = cache reads (subset of input). Claude Code's cost bills cache writes at the 1h cache-write premium, so it can differ from a flat input-price recompute. Web disabled; tools Read/Write/Edit/Glob/Grep/Bash; single run; scored automatically (11/11 checks).

Estimated cost List-price estimate; not actually billed.

Metrics

Estimated cost: $0.01
Wall time: 1m
Human step-ins: 0
Turns: 6

Model usage
Model	Input tok	Output tok	Cost
AClaude Haiku 5.5anthropic/claude-haiku-5.5effort default (no --effort flag) · thinking on	55,777	18,407	$0.01

Reproduce this run

Use the use case prompt on the use case page.
Same setup: Claude Haiku 5.5 (anthropic/claude-haiku-5.5, effort default (no --effort flag) · thinking on) via Claude Code 2.1.299 (headless -p), cloud.
It counts as a success only if it meets every success criterion: All automated rubric checks pass: index.html exists; menu.html exists; about.html exists; contact.html exists; styles.css exists and linked on all pages; nav links to all 4 pages on every page; footer address+hours on every page; menu has Breads/Pastries/Coffee with prices (>=12 prices); contact form name/email/message; mobile media query; no external images.
Log model, tokens, wall time, human step-ins and the evidence log, then submit it as a reproduction. A different model? Submit a head-to-head rerun.

How runs are scored: Methodology.

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Automated checks

Trust 80% comes from these checks (how Trust % works).

Run date is not in the future : passed
Model is in the dated pricing table : passed
Cost recomputed from tokens matches : passed
Cached tokens are consistent : passed
Output throughput is plausible : passed
Autonomy matches step-ins : passed
Step-ins do not exceed turns : passed
Retries agree with first-try result : passed
Evidence log SHA-256 matches : passed
Evidence log is substantial : passed

Evidence log

{
 "duration_api_ms": 67798,
 "stop_reason": "end_turn",
 "session_id": "[REDACTED]",
 "total_cost_usd": 0.014387750000000001,
 "usage": {
  "input_tokens": 4,
  "cache_creation_input_tokens": 24348,
  "cache_read_input_tokens": 31425,
  "output_tokens": 18407,
  "output_tokens_details": {
   "thinking_tokens": 2734
  },
  "server_tool_use": {
   "web_search_requests": 0,
   "web_fetch_requests": 0
  },
  "service_tier": "standard",
  "cache_creation": {
   "ephemeral_1h_input_tokens": 24348,
   "ephemeral_5m_input_tokens": 0
  },
  "inference_geo": "global",
  "iterations": [
   {
    "input_tokens": 2,
    "output_tokens": 809,
    "cache_read_input_tokens": 18886,
    "cache_creation_input_tokens": 18001,
    "cache_creation": {
     "ephemeral_5m_input_tokens": 0,
     "ephemeral_1h_input_tokens": 18001
    },
    "type": "message"
   }
  ],
  "speed": "standard",
  "fallback_credit": null
 },
 "modelUsage": {
  "claude-haiku-5-5": {
   "inputTokens": 4,
   "outputTokens": 18407,
   "cacheReadInputTokens": 31425,
   "cacheCreationInputTokens": 24348,
   "webSearchRequests": 0,
   "costUSD": 0.014387750000000001,
   "contextWindow": 1000000,
   "maxOutputTokens": 128000,
   "thinkingTokens": 2734,
   "canonicalModel": "claude-haiku-5-5",
   "provider": "firstParty",
   "costBasis": "list"
  }
 },
 "permission_denials": [],
 "terminal_reason": "completed",
 "fast_mode_state": "off",
 "fast_mode_disabled_reason": "sdk_opt_in_required",
 "subagent_stats": {
  "spawned": 0,
  "requested": {
   "background": 0,
   "foreground": 0,
   "unset": 0
  },
  "started_in_background": 0,
  "max_depth": 0,
  "spawned_by_subagents": 0,
  "completed": 0,
  "failed": 0,
  "killed": {
   "parent": 0,
   "user": 0,
   "system": 0
  },
  "refused": {
   "depth_limit": 0,
   "concurrency_limit": 0,
   "budget": 0
  },
  "by_type": {}
 },
 "safety_stops": 0,
 "is_error": false,
 "num_turns": 6,
 "subtype": "success",
 "api_error_status": null,
 "result": "The five files are in `./usecase-runner/runs/14-haiku/work/`: `index.html`, `menu.html`, `about.html`, `contact.html`, and a shared `styles.css`. I checked the markup by reading it but did not open the pages in a browser.\n\n- **Shared nav and footer:** every page has the same header linking to all four pages, with the current page marked, and the same footer with 41 Fore St, Portland, ME 04101 and Tue\u2013Sun 7am\u20133pm.\n- **Home:** hero, three signature items (Blueberry Lemon Scone, Almond Croissant, Harbor Sourdough) drawn as inline SVG, and three testimonials.\n- **Menu:** Breads, Pastries, and Coffee, with five or six priced items in each.\n- **About:** the origin story and a three-person team section with placeholder portraits.\n- **Contact:** a form with name, email, and message fields, plus an address and hours block and a CSS-drawn map placeholder.\n- **Responsive:** a 880px breakpoint drops grids to two columns and a 720px breakpoint drops them to one.\n- **No external assets:** no JavaScript, no web fonts, no remote images. Everything is CSS or inline SVG.\n\nThings you need to replace before launch:\n- **Names, bios, and testimonials are invented.** Ruth Pelletier, Dan Pelletier, Lena Ward, and the three quotes are placeholders.\n- **Prices and menu items are invented.** Please check them against the real menu.\n- **The email address is a placeholder.** `[REDACTED:email]` is not a real address.\n- **The form does not submit anywhere.** `action=\"#\"` is a stub, and a comment in `contact.html` marks where to put a real handler endpoint.\n- **The map is a placeholder.** A comment in `contact.html` marks where to put a real map embed.\n- **Copyright year and founding year are my choices.** The footer says 2026 and the story says the family started in 2009 and the cafe opened in 2016.\n\nThis is not a git repository, so I did not commit anything.",
 "ttft_ms": 14441,
 "type": "result",
 "duration_ms": 68051,
 "uuid": "[REDACTED]",
 "ttft_stream_ms": 1107,
 "time_to_request_ms": 219,
 "first_content_frame_ms": 1107,
 "queued_turn_count": 0,
 "result_index": 0
}