Step 18: tool results

{
  "stance": "affirms",
  "context": "Executive summary of METR's high-access assessment. METR attributes a majority (perhaps about 80%) of the October 2026 acceleration to AI, but notes non-AI causes in late 2025 and expects cumulative attribution since October 2025 to be lower than the instantaneous figure; it affirms the claim for 'today' rather than the whole period.",
  "speaker": "METR (Cunningham, Rush, Whitfill, Wijk)",
  "claim_id": "e4cbf66e-fd61-4ae6-8247-19b9b2fa87c9",
  "reasoning": "The recorded passage was about autonomous contributions, not attribution of the acceleration. Having read the report, the executive-summary attribution sentence is the one that bears on this claim. Confidence lowered because METR affirms a majority share for the current (instantaneous) acceleration, while the claim covers the cumulative period.",
  "confidence": 0.7,
  "instance_id": "ce0702d7-3316-46a7-ae9d-ca5e74372db0",
  "publication": "METR Blog",
  "source_date": "2026-11-05",
  "verbatim_text": "A majority of this acceleration today is likely attributable to Anthropic's extensive use of AI to do R&D, though there is significant uncertainty and other causes likely played a large role in acceleration in late 2025."
}

{
  "note": "METR's attribution rests on internal Anthropic data that Anthropic redacted, including METR's detailed cumulative and instantaneous attribution estimates. Only the benchmark trend, staff interview impressions and loose Slack-poll uplift figures are public. METR states the public must rely on its judgment, and that cumulative attribution since October 2025 is expected to be lower than the roughly 80% instantaneous October 2026 figure.",
  "support": "evidence_not_shown",
  "deployment": "Headline subjective conclusion of an independent high-access assessment of AI R&D acceleration at Anthropic.",
  "instance_id": "ce0702d7-3316-46a7-ae9d-ca5e74372db0",
  "source_kind": "report",
  "source_read": true,
  "worth_reading": true,
  "worth_reading_reason": "It is the only substantive evidence on attribution; its methodology appendix distinguishes cumulative from instantaneous attribution, which decides how the claim should be read."
}