Claim · Date unknown · Stated in source · Supported

Anthropic's Claude 3.7 Sonnet System Card states that, under voluntary memorandums of understanding, the U.K. AI Security Institute conducted pre-deployment testing of Claude 3.7 Sonnet across the domains set out in its Responsible Scaling Policy framework, which include CBRN.

One recorded claim. The claim panel gives its qualification, the source passages with their place in each source, and how it was checked.

What it connects

→ documented evaluation engagement with → Anthropic

Where it appears

No collection page holds this claim. It is listed with its records in the explorer.

Claim and evidence

documented evaluation engagement with ↓Anthropic

Machine-checked, not reviewed by an editorStated in sourceSupported

Supporting evidence: primary · 1 source

Date: Date unknown
Activity stage: reported performed
Evaluated system: Claude 3.7 Sonnet
Activity scope: Pre-deployment testing of Claude 3.7 Sonnet across the RSP framework's domains, which include CBRN

Scope and limitsReported performed work, as the developer describes it. The institute's own report was not retrieved, and the card does not state what was tested within the CBRN domain.

The evidence 01

primary sourceSupports the claim

Claude 3.7 Sonnet System Card

Anthropic · Publication date unknown

Cite the original source

Cite the original document, not Selekoa. Check these details against it.

Source excerpt

“Under our voluntary Memorandums of Understanding, the U.S. AI Safety Institute (U.S. AISI) and U.K. AI Security Institute (U.K. AISI) conducted pre-deployment testing of Claude 3.7 Sonnet across the domains outlined in our RSP framework.”

Location in source PDF p. 41, §7.4 Third Party Assessments

How it was read Retrieved directly from the publisher

Machine-checked · 2026-10-30

Source details and check notes

Authors: Anthropic
Version: Retrieved for the candidate pack on 2026-10-28 (SHA-256 82947a46fc2d1b9a1d69501ef973fc3c5b328b703b9a17bd8a143c2672f8a1a6). 42-page PDF as served on 2026-10-28; the request to assets.anthropic.com redirected to https://www-cdn.anthropic.com/9ff93dfa8f445c932415d335c88852ef47f1201e.pdf. The document itself states no publication date; its references are dated February 2025. Retrieved again at admission on 2026-10-30 (SHA-256 82947a46fc2d1b9a1d69501ef973fc3c5b328b703b9a17bd8a143c2672f8a1a6, the same bytes).
Canonical address: Open the canonical source ↗
Accessed: 2026-10-28
Language: English (en)
Attribution: Anthropic, “Claude 3.7 Sonnet System Card”.
Reuse: No open redistribution licence asserted. Bibliographic metadata, editorial paraphrases and short attributed quotations (at most 50 words each). Recheck terms before wider redistribution.
Check notes: Candidate pack passage, AI and biosecurity (research/ai-bio). The quotation (35 words) matched the text retrieved for the candidate pack on 2026-10-28 and again at admission on 2026-10-30, in a fresh retrieval whose SHA-256 equals the pack’s. Matching ignored differences of whitespace, case, quotation marks, dashes and Unicode compatibility forms, so the source’s typography can differ. The same passage as in the US engagement record; it is counted once against the source's quotation budget. No human editorial review.

Status and meaning

Editorial status. Not reviewed by an editor. An exploratory record that no editor has accepted. This status does not say whether a person has read any linked passage. Each evidence record above shows how it was checked.

Relation. An evaluator’s explicitly documented, system-specific engagement with a developer. Proposed, announced and reported performed work are distinct activity stages. Reported performance does not independently verify execution, effectiveness or certification.

Date. The card states no date for the testing or for itself.

Record ID ab-ev-claude37-uk-aisi-engagement