The Driftproof receipt for hyperframes on Claude Opus 5.5, dated 2026-10-18, and what it can say.
hyperframes 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 existing: the two arms' spreads sum to 0.077, at or above the 0.05 floor).
The two arms
| arm | mean | spread across cases | cases |
|---|---|---|---|
| with the skill | 0.965 | ± 0.017 | 3 |
| without the skill | 0.940 | ± 0.009 | 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/69be076a5223146e507dce6a99c23634ad440486efe0239c324e3ff0563ecc69.json; run.transcripts records retained-local.
Receipt hash: 8c6c0dae462e3c4f66ead0569945188d38bc210e5a942b5d25f25fe219048de2
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/69be076a5223146e507dce6a99c23634ad440486efe0239c324e3ff0563ecc69.json
npx driftproof@0.22.4 validate 69be076a5223146e507dce6a99c23634ad440486efe0239c324e3ff0563ecc69.json