Analyzing METR dates to estimate Anthropic's internal capability lead — a 7-day shift moves the integral over 40%

teortaxesTex · x · 2026-11-06

tenobrus shows you can reverse-engineer from METR's "majority internal access" dates how long frontier models are used internally before public release, then compute a cumulative "internal capability gap integral" (AECI-days) tracking Anthropic's accumulated advantage over time.

Skeptics counter that the implied gaps — often just days to two weeks — are implausible: employees almost certainly had access to earlier, similarly capable checkpoints long before the named model's official internal date. The reported date likely only reflects the exact final checkpoint. By this reading, even a 7-day earlier access shift pushes total AECI-days up over 40%, meaning these internal-vs-external gap charts are highly misleading.

Related event: METR Report Finds Anthropic Internal AI R&D Nearly Doubled in Speed, Shaking Community Expectations(53 posts)→

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