METR
Every datapoint in the Fieldbook that cites METR as a source, with the credibility tier it carries and a link to where the claim appears. The public provenance record for this source.
metr.org · cited 19 citations across the Fieldbook
METR (metr.org) is a primary or authoritative reference: a vendor statement about its own product, or an established research body, standards organisation or government source, strong enough to underpin a confirmed datapoint. It is cited 19 times across the Fieldbook, backing datapoints in safety evals and task horizon. Every figure the corpus draws from this source is graded T1, so the credibility of the claim travels with the claim itself.
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Every datapoint below links to where the claim appears in the corpus, where a dedicated view exists, and to the exact source URL it rests on. Any reader can follow a fact back to its origin and check it, rather than take it on trust.