Claim · 2026-10-07 · publication · Stated in source · Supported

Anthropic published the Claude Haiku 5.5 system card, dated October 7, 2026 on its cover.

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 → System Card: Claude Haiku 5.5

Where it appears

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

Claim and evidence

Anthropicpublished ↓System Card: Claude Haiku 5.5

Machine-checkedStated in sourceSupported

Supporting evidence: primary · 1 source

Object version: As dated October 7, 2026 on its cover · Published 2026-10-07 · Effective date not established
Date: 2026-10-07 · publication Records dated 2026 →

Scope and limitsPublication is not evidence that the evaluations described were carried out as described.

The evidence 01

primary sourceSupports the claim

System Card: Claude Haiku 5.5

Anthropic · 2026-10-07

Archived copy, captured 2026-10-26: System Card: Claude Haiku 5.5

Cite the original source

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

Source excerpt

“System Card: Claude Haiku 5.5 October 7, 2026”

Location in source Cover, 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 d5dbaab6996c02ad6ff28b032ce5a9c7582e59af09b5d1bc0975cf0235535da9) directly from the publisher’s host; the request redirected to https://assets.claude.com/e1080d6bf5ae2018ea3c2f414064be03232f5be5.pdf. Retrieved again on 2026-11-03 with the same SHA-256. 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: 2026-11-02
Language: English (en)
Archive copy: Open archived copy, captured 2026-10-26: System Card: Claude Haiku 5.5. Captured 19 days after the recorded publication date. An archive copy shows only what the archive retrieved on 2026-10-26. It does not prove what the page said earlier, and it can differ from the copy checked on 2026-11-02.
Attribution: Anthropic, “System Card: Claude Haiku 5.5”, 2026-10-07.
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 (8 words) matched the card’s text retrieved for the candidate pack on 2026-11-02 (SHA-256 d5dbaab6996c02ad6ff28b032ce5a9c7582e59af09b5d1bc0975cf0235535da9) 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 printed on the cover; the card does not label it as an issue or publication date.

Record ID mc-anthropic-claude-haiku-5-5-card-published