organizational research article

Summary of METR's predeployment evaluation of Claude Opus 5.5

METR · Published 2026-09-22

Evidence from this source

Results and research linked to this document
Type	Evidence
Paper / report	Summary of METR's predeployment evaluation of Claude Opus 5.5 Source details Primary publication source

Document tracking details

Source ID: src-metr-opus55-predeployment-20260922
Source type: Primary
Original URL: https://metr.org/blog/2026-09-22-claude-opus-5-5/
Retrieved URL: https://metr.org/blog/2026-09-22-claude-opus-5-5/
Last updated by publisher: Not reported
Access status: available
Retrieved: 2026-10-14T20:07:41Z
Document fingerprint: ddc9cb95316c9b1a8c49494a4ec04f9121412ffba2810375e0c8daa04ae297b4
Based on original bytes. Used to detect changes to the source.

2026-10-14T20:07:41Z · success: Original HTML retained; dated byline, independence note, Summary of evidence and Conclusions A/B checked. Linked system card, underlying private tasks and other reports were not newly audited.