Claude system card reveals METR's internal-access team shared conclusions, not evidence

rohanpaul_ai · x · 2026-09-23

Per the Claude Opus 5.5 system card, a separate METR team with deep access to Anthropic's internal AI R&D data shared its conclusions with the public-assessment team — but not the supporting evidence or reasoning. Part of the public assessment of Anthropic's AI-driven R&D acceleration thus rests on evidence outsiders, and even another METR team, could not independently inspect.

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