The Driftproof receipt for grill-me on Claude Opus 5.5, dated 2026-10-18, and what it can say.
grill-me on claude-opus-5-5
Not enough draws
Not enough draws to conclude at this effect floor.
Draws needed: no draw count at these spreads (case plan: the two arms' spreads sum to 0.165, at or above the 0.05 floor).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.744 | ± 0.088 | 3 |
| without the skill | 0.752 | ± 0.107 | 3 |
No lift is stated for a state that did not measure one. A spread is the sample standard deviation of the per-case means: a descriptive spread with no coverage probability. The verdict above reads each case's two bands, not these aggregates.
What was verified
receipt_hash verified when this page was built from receipts/skill-measurements/published/8338050790d9fcc1b2c1ffedadd52a1bc0b4df8becccf406b54f1dd6a5e99ab0.json; run.transcripts records retained-local.
Receipt hash: cd684c7ebf96b6fb9841b6ac0f148b0b31213f1c4b912cea4706d6b13b799879
Check this file yourself
validate shows that this file is unchanged since it was sealed. It does not show who made it or who sealed it.
curl -fsSLO https://raw.githubusercontent.com/driftproofhq/driftproof/main/receipts/skill-measurements/published/8338050790d9fcc1b2c1ffedadd52a1bc0b4df8becccf406b54f1dd6a5e99ab0.json
npx driftproof@0.22.4 validate 8338050790d9fcc1b2c1ffedadd52a1bc0b4df8becccf406b54f1dd6a5e99ab0.json