# Anthropic Confirmatory v2 Result

## Status

Protocol `pfb-anthropic-confirmatory-v2` was frozen before live execution. The
provider, model identifier, complete-object conformance function, 40-scenario
corpus, ten repetitions, randomized 400-trial schedule, compound endpoint,
denominator, cost ceiling, and reporting commitment were fixed in advance.

The 12-case exact-conformance preflight passed 12/12. The main run then
completed all 400 scheduled trial identifiers.

## Primary endpoint

- Strict confirmatory successes: **400/400**
- Strict failures: **0**
- Full-object conformance failures: **0**
- Policy-oracle failures: **0**
- State-transition failures: **0**
- Containment failures: **0**
- Missing trials: **0**
- Trial-level exact 95% lower bound: **99.08%**
- Scenario clusters with all repetitions successful: **40/40**
- Scenario-level exact 95% lower bound: **91.19%**
- Threat-family clusters with all cases successful: **10/10**
- Family-level exact 95% lower bound: **69.15%**

The pre-specified provider acceptance rule passed.

## Operational record

- Model recorded in the ledger: `claude-sonnet-5`
- Main-run cost: **USD 1.70192**
- Preflight cost estimated from recorded tokens: **USD 0.05289**
- Main-run input tokens: **513,990**
- Main-run output tokens: **67,394**
- Trial latency median: **2.530 s**
- Scenario median-of-medians: **2.285 s**
- Transient or terminal aborts: **0**
- Ledger events: **4,000**
- Duplicate event identifiers: **0**
- Payload-hash failures: **0**

## Evidence interpretation

The result promotes the new Anthropic v2 ledger to prospective primary
evidence. It does not replace the historical Anthropic v1 ledger, where exact
full-object conformance was 291/400 because commentary was added inside the
context object. The v1 discrepancy remains evidence of interface drift under
the earlier execution path. The v2 result establishes that the corrected,
prospectively frozen path satisfied its complete compound endpoint in 400/400
scheduled trials.

Across OpenAI v1, Anthropic v1, and Anthropic confirmatory v2, the study now
contains 1,200 completed records. Decision and transition verification passed
in all 1,200, and the decision-relevant authorization envelope matched in all
1,200. Exact full-object results must still be reported by cohort rather than
silently pooled.

## Integrity

The archived analysis was reproduced independently from the ledger and frozen
schedule. The regenerated analysis had the same SHA-256 digest as the archived
analysis:

`f4e1f11222c565e61be9c7abf0e2bc56ac627da13dea66466a62280842d8c959`

No API key is included in the evidence package.
