Claim · 2023-11-21 · revision · Stated in source · Supported

Anthropic published an update of its Claude 2 model card, dated November 21, 2023, which adds an appendix on Claude 2.1.

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 → published → Claude 2 model card

Where it appears

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

Claim and evidence

Anthropicpublished ↓Claude 2 model card

Machine-checkedStated in sourceSupported

Supporting evidence: primary · 1 source

Date: 2023-11-21 · revision Records dated 2023 →

Scope and limitsThe update is recorded as a later version of the existing Claude 2 model card. Publication is not evidence that the evaluations described were carried out as described.

The evidence 01

primary sourceSupports the claim

Model Card and Evaluations for Claude Models, with 'Claude 2.1 Model Card Appendix' (update of November 21, 2023)

Anthropic · Publication date unknown

Cite the original source

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

Source excerpt

“Update (November 21, 2023): We have added an appendix section covering Claude 2.1.”

Location in source Section 1 'Introduction', PDF p. 1

How it was read Retrieved directly from the publisher

Machine-checked · 2026-11-03

Source details and check notes

Authors: Anthropic
Version: Retrieved for the candidate pack on 2026-11-02 (SHA-256 e735ad89f95c7aa295459e0ef9153d2c54a7503f16ff39c8e20b9b4f22fd4d56) directly from the publisher’s host. Retrieved again on 2026-11-03 with the same SHA-256. The Claude 2 model card as re-issued with a 'Claude 2.1 Model Card Appendix' (16 pages), linked from Anthropic's Claude 2.1 announcement. Its update line is dated November 21, 2023; the card prints no issue date. A later expression of the card than the 14-page expression the dataset already holds.
Version date: 2023-11-21
Canonical address: Open the canonical source ↗
Accessed: 2026-11-02
Language: English (en)
Attribution: Anthropic, “Model Card and Evaluations for Claude Models, with 'Claude 2.1 Model Card Appendix' (update of November 21, 2023)”.
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, model cards compared (research/model-cards). The quotation (13 words) matched the card’s text retrieved for the candidate pack on 2026-11-02 (SHA-256 e735ad89f95c7aa295459e0ef9153d2c54a7503f16ff39c8e20b9b4f22fd4d56) and again on 2026-11-03 in a fresh retrieval with the same SHA-256. Matching ignored differences of whitespace, case, quotation marks, dashes, PDF line-break hyphens and Unicode compatibility forms, so the source’s typography can differ. No human editorial review.

Status and meaning

Editorial status. Machine-checked. Machines found this record and checked it against its sources; no person accepted it individually. Each evidence record above shows how it was checked.

Relation. Publication of a specific document or version. Publication of a policy is not evidence of implementation.

Date. The date of the card's update line, day precision. The card prints no issue date of its own; its text dates the release of Claude 2, not the card.

Record ID mc-anthropic-claude-2-1-card-update