{
 "generated": "2026-08-25",
 "score_semantics": "score = log2(given_cost / optimized_cost); higher is better",
 "curve_semantics": "running best score vs minutes of active agent time; every listed run is solo (no subagents) at high reasoning and passed the official final correctness grade",
 "notes": [
  "Runs were recorded on different dates with different harness versions; each cell is one run.",
  "jcode and Claude Code Opus 4.8 curves are the historical 2026-07-05/06 head-to-head runs on one shared 8-core machine.",
  "Codex CLI, OpenCode, and the 2026-07-19 jcode model-matrix runs used 4-CPU single-use Modal containers.",
  "Best scores are the highest sampled grade in the run and are not all full-exhaustive-gate measurements.",
  "The four Claude Opus 5 low/high series use the canonical 2026-08-24 selection: seven clean originals and five validated replacements.",
  "Ox Alpha low/high/max uses seven original cells plus two guarded Float Print replacements. High Float Print includes both active-time segments of a seeded recovery and was accepted only after a positive exhaustive 2^32-value gate; max Float Print also passed the exhaustive gate."
 ],
 "excluded_samples": [
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   "task": "json-unescape",
   "run_id": "20260719T023554Z-jcode-solo-claude-sonnet-5-json-unescape",
   "sample": {
    "minute": 26.7,
    "score": 14.3015,
    "seed": 30166,
    "cost": 2633
   },
   "reason": "single non-repeated sample from a degenerate random corpus; the immediately following grades returned to ~0.93 and no later grade approached it"
  }
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