Claim · 2025-03-31 · effective · Stated in source · Supported

The RSP v2.1 change log states that the update adds a new capability threshold related to CBRN development, defining capabilities that could substantially uplift the development capabilities of moderately resourced state programs.

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

Anthropic Responsible Scaling Policy — v2.1 → changes from → Anthropic Responsible Scaling Policy — v2.0

Where it appears

Frontier safety frameworks →

Claim and evidence

Anthropic Responsible Scaling Policy — v2.1changes from ↓Anthropic Responsible Scaling Policy — v2.0

Machine-checked, not reviewed by an editorStated in sourceSupported

Supporting evidence: primary · 1 source

Basis of the change: Official changelog
Subject version: v2.1 · Publication date unknown · Effective 2025-03-31
Object version: v2.0 · Publication date unknown · Effective 2024-10-15
Date: 2025-03-31 · effective

Scope and limitsThe change is the publisher’s own description in its change log. It establishes no effect on practice and no safety ranking between the editions.

The evidence 01

primary sourceSupports the claim

Responsible Scaling Policy — v2.1

Anthropic · Publication date unknown

Archived copy, captured 2025-04-02: Responsible Scaling Policy — v2.1

Cite the original source

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

Source excerpt

“We have added a new capability threshold related to CBRN development, which defines capabilities that could substantially uplift the development capabilities of moderately resourced state programs.”

Location in source PDF p. 22 (printed p. 18), Changelog, entry “March 31, 2025 (RSP v2.1)”, paragraph “New Capability Thresholds”, first sentence

How it was read Retrieved directly from the publisher

Machine-checked · 2026-10-30

Source details and check notes

Authors: Anthropic
Version: Responsible Scaling Policy v2.1; effective date 2025-03-31.
Version date: 2025-03-31
Canonical address: Open the canonical source ↗
Accessed: 2026-09-18
Language: English (en)
Archive copy: Open archived copy, captured 2025-04-02: Responsible Scaling Policy — v2.1. Captured 2 days after the recorded version date. An archive copy shows only what the archive retrieved on 2025-04-02. It does not prove what the page said earlier, and it can differ from the copy checked on 2026-09-18.
Attribution: Anthropic, Responsible Scaling Policy — v2.1.
Reuse: No open redistribution licence asserted. Selekoa practice: metadata, attributed paraphrases and short attributed quotations under the editorial policy (at most 50 words each; at most 400 quoted words per document across the dataset, and about 10% of a document under about 2,000 words). Documents are linked externally, not redistributed. Publisher terms that forbid quotation override this practice.
Check notes: Candidate pack passage, AI and biosecurity (research/ai-bio). The quotation (26 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. A cross-family machine check (2026-10-30, item 4) re-read the record’s sources and found full support. 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. One scoped difference between document versions. The claim identifies publisher-stated change, official changelog/redline, or an explicitly inferred comparison. It does not establish implementation, effectiveness or a safety ranking.

Date. Change as stated in the v2.1 change log, dated by the edition’s effective date.

Record ID ab-fw-rsp-v2-1-adds-cbrn-development-threshold