GPAI Ledger › Claude Sonnet 4.5 (Anthropic)
Claude Sonnet 4.5
Public summary of training content · Article 53(1)(d), Regulation (EU) 2024/1689
Provider: Anthropic — status: Missing (The AI Accountability Lab (AIAL) assesses this model as covered by the EU disclosure obligation but has found no published summary — their research assessment, not a legal ruling.)
No public summary of training content has been located for Claude Sonnet 4.5. This page tracks the locations where one would appear and will archive every version once published.
AIAL metadata: summary dated none found, model released 2025-09-29, eval page
Anthropic publishes summaries for some newer models in its trust center (watched here); none has been located for this model.
Third-party evaluation
The AI Accountability Lab scores published summaries against the Commission's template and publishes the result. These are captures of their assessment, archived here because they are revised over time and a score is otherwise unrecoverable once changed. It is AIAL's research judgement, not a legal determination, and not the provider's document. Their assessment is archived here but not served on this site or in the dataset: each capture below proves what was published and when, and points to AIAL for the content. Attribution: aial.ie.
| Capture (UTC) | Source of copy | URL | SHA-256 | Bytes | Notes |
|---|---|---|---|---|---|
| 20260916T072750Z | AIAL evaluation page | aial.ie/research/gpai-training-transpare…s/anthropic-claude-sonnet-4-5/ | 6c87a8eb2facb4fe… | 11,795 | bytes identical to 20260831T113435Z |
| 20260916T072744Z | AIAL evaluation | raw.githubusercontent.com/AIAccountabili…thropic-claude-sonnet-4-5.yaml | d666d3cd0ce192f4… | 3,801 | bytes identical to 20260829T142404Z |
| 20260915T074123Z | AIAL evaluation (earlier state) | raw.githubusercontent.com/AIAccountabili…thropic-claude-sonnet-4-5.yaml | d666d3cd0ce192f4… | 3,801 | the state that stood upstream from 14 Sep 2026 (fetched here on 15 Sep 2026); bytes identical to 20260829T142404Z |
| 20260831T113435Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…s/claude-sonnet-4-5/index.html | 6c87a8eb2facb4fe… | 11,795 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); bytes differ from the previous capture; the extracted text is identical, so no change is visible in the text layer (the text layer does not carry checkbox or form-field state) |
| 20260831T111221Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…s/claude-sonnet-4-5/index.html | ef4d4f3619cd936c… | 11,468 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); bytes differ from the previous capture; the extracted text is identical, so no change is visible in the text layer (the text layer does not carry checkbox or form-field state) |
| 20260831T103210Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…s/claude-sonnet-4-5/index.html | e9215440383c8aa9… | 11,414 | the state that stood upstream from 3 Aug 2026 (fetched here on 31 Aug 2026) |
| 20260829T184703Z | AIAL evaluation (earlier state) | raw.githubusercontent.com/AIAccountabili…1/evals/claude-sonnet-4-5.yaml | d666d3cd0ce192f4… | 3,801 | the state that stood upstream from 3 Aug 2026 (fetched here on 29 Aug 2026); bytes identical to 20260829T142404Z |
| 20260829T183321Z | AIAL evaluation (earlier state) | raw.githubusercontent.com/AIAccountabili…8/evals/claude-sonnet-4.5.yaml | 61b2763c56bd8a0b… | 3,800 | the state that stood upstream from 20 Mar 2026 (fetched here on 29 Aug 2026) |
Captures of superseded target URLs
Locations this ledger previously tracked for this source (per-row notes give the reason each was superseded) — kept as faithful records of what those URLs served at capture time.
| Capture (UTC) | Source of copy | URL | SHA-256 | Bytes | Notes |
|---|---|---|---|---|---|
| 20260831T120055Z | AIAL evaluation page | aial.ie/research/gpai-training-transparency/evals/claude-sonnet-4-5/ | 6c87a8eb2facb4fe… | 11,795 | bytes identical to 20260831T113435Z; superseded 16 Sep 2026: AIAL's 14 Sep 2026 rename moved this evaluation's page to https://aial.ie/research/gpai-training-transparency/evals/anthropic-claude-sonnet-4-5/, which the ledger now tracks. The pre-rename path is a leftover directory in their repository: their site writes one directory per evaluation file, and no file carries the old name any more. |
| 20260829T142404Z | AIAL evaluation | raw.githubusercontent.com/AIAccountabili…n/evals/claude-sonnet-4-5.yaml | d666d3cd0ce192f4… | 3,801 | superseded 16 Sep 2026: AIAL's 14 Sep 2026 'name consistency check' renamed this evaluation file to anthropic-claude-sonnet-4-5.yaml, which the ledger now tracks; this address has answered 404 since that rename (recorded by the 14 and 15 Sep 2026 sweeps). |
Last checked: 2026-10-05 (re-checked on the daily schedule — see Methodology). Seen a summary we missed? See the contact details.