The prompt (verbatim, sent to every lane)
Extract every email address from the text below. Normalize spelled-out addresses (e.g. "x DOT y AT z DOT com" becomes x.y@z.com). Reply with the unique addresses only: lowercase, sorted alphabetically, one per line, nothing else. Contact ops@LedgerLane.co.uk for invoices. Marketing wants you to cc mara DOT chen AT ledgerlane DOT com — she hates spam. JT prefers jt+receipts@mail.ledgerlane.co.uk (the plus tag keeps his inbox sorted). The old alias ops@ledgerlane.co.uk still works, and the Slack handle @finance-bot is not an email.
Live runs are switched off right now — replays (recorded 2026-07-12) are the whole show today.
Live means live: 4 models answer this prompt for real, on my dime — reserving $0.0087 for this run against a shared $0.50 daily reservation ceiling. Replays stay free either way.
Going live sets one cookie (bl_sid, 30 days). It holds a random id, not your identity. The five-runs-a-day gate counts both that signed browser session and a one-way hash of the connection address; raw IP addresses never touch storage, and nothing else rides along.
How scoring works
Every lane gets the identical prompt at the same moment. A small script — not an AI judge — checks each answer against the rule below and stamps it CORRECT or WRONG; the line under each lane shows exactly what the check saw. No partial credit.
This challenge's rule
Unique, lowercase, sorted, one per line — exact match against the three correct addresses. WRONG lanes show the first mismatch position. Scoring strips leading/trailing whitespace and one wrapping pair of code fences or quotes before it judges — content over ceremony. Winner rule: correct → cheapest → fastest.
Prices as listed by OpenAI and Anthropic, July 2026. Costs come from provider usage fields × list prices — nothing is invented.
LIVE BUDGET ················ UTC day live runs ··········· ········open budget reserved ········ $0.00 daily cap ··················· $0.50 ──────────────────────────────────── replays ··········· free, unmetered