{
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 "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."
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   "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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