Claim · Date unknown · Inferred · Supported

No passage meeting the model-card question “Release date” was found in Claude 3.5 Sonnet Model Card Addendum within the inspected scope.

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

Claude 3.5 Sonnet Model Card Addendum → has no matching provision within the inspected scope → Release date

Where it appears

Model cards compared →

Claim and evidence

Claude 3.5 Sonnet Model Card Addendumhas no matching provision within the inspected scope ↓Release date

Machine-checkedInferredSupported

Supporting evidence: primary · 1 source

Reasoning and premisesPremises: the model-card question asks for the following. A passage of the card giving the model’s release, launch or availability date, or the release form (API, consumer product, open weights, limited preview), quoted. Stated if a date or a dated event is given; partly if only the form of release, or only a relative timing (for example, “at launch”), is given. The inspected scope of Claude 3.5 Sonnet Model Card Addendum was: Whole text. Terms searched: “release”, “available”, “availability”, “launch”, “API”, “Claude.ai”. Passages read and not counted: Section 3 'Safety', Introduction, PDF p. 6: 'regular safety testing prior to releasing frontier models' states a practice, not this model's release. The conclusion is bounded by that scope and method.

Provision: Model-card question · provision ID model-card-q02
Date: Date unknown

Scope and limitsNo release or availability date or form of release was found in the addendum. A recorded absence within the stated scope of the card read: not evidence that the developer did not do the thing asked about, or did not disclose it elsewhere.

The evidence 01

primary sourceSupports the claim

Claude 3.5 Sonnet Model Card Addendum

Anthropic · Publication date unknown

Archived copy, captured 2024-06-20: Claude 3.5 Sonnet Model Card Addendum

Cite the original source

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

Paraphrase

Within the inspected scope, no passage meeting the model-card question “Release date” was found.

Location in source Claude 3.5 Sonnet Model Card Addendum: Whole text.

How it was read Retrieved directly from the publisher

Machine-checked · 2026-11-04

Source details and check notes

Authors: Anthropic
Version: Retrieved for the candidate pack on 2026-11-04 (SHA-256 ac396c7f155dcbfb33ceb342b48647e330ca518c01c7f508001d6aad93257a03) directly from the publisher’s host. Retrieved again on 2026-11-03 with the same SHA-256. The addendum prints no date. Anthropic's card index gives June 2024, and an update line of the Claude 3 card dates the addendum's addition to that card to June 20, 2024; neither is the addendum's own date. The archive capture was found by an index search of the Internet Archive on 2026-11-03; it was not opened, and its bytes are not authenticated.
Canonical address: Open the canonical source ↗
Accessed: 2026-11-04
Language: English (en)
Archive copy: Open archived copy, captured 2024-06-20: Claude 3.5 Sonnet Model Card Addendum. No publication date is recorded for this source. An archive copy shows only what the archive retrieved on 2024-06-20. It does not prove what the page said earlier, and it can differ from the copy checked on 2026-11-04.
Attribution: Anthropic, “Claude 3.5 Sonnet Model Card Addendum”.
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: Absence recorded for the model-cards candidate pack (research/model-cards-2) on 2026-11-04 by an automated research assistant and audited in a fresh context by the same model family. 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. A recorded absence: within the stated locator scope of an exact edition, no passage stating the keyed provision was found. It is not an inferred deletion and says nothing about other documents, practice or intent.

Date. The card prints no date of its own, so its cells carry no date.

Record ID mc-cell-anthropic-claude-3-5-sonnet-q02