{"schema":"chai-model-card/0.1-stub","vendor":"ChatGPT","metrics":{"composite_score":0.9722,"fabrication_rate":0.0115,"unsupported_inference_rate":0.0745,"severity_weighted_omission_rate":0.0449},"workflow":"Ambient Clinical Scribe","signed_by":{"name":"Dr. Alice Reviewer","credential":"MD"},"attested_at":"2026-08-25T18:42:52.534613+00:00","methodology":"Controlled synthetic cases; atomic claim grounding vs. the source packet; per-run canary registry for cross-subject containment testing; reviewer-adjudicated low-confidence, fabrication, containment, and severe-omission claims; severity-weighted tiering. Rates carry 95% Wilson confidence intervals, and tiers gate on the conservative (upper) bound of the interval rather than the point estimate.","attested_tier":"fail","model_version":"chatgpt-gpt-4o","workflow_slug":"ambient-scribe-v1","assurance_level":"verified","integration_mode":"connected","workflow_version":1}