GPAI Ledger › Claude Opus 4.5 (Anthropic) › Capture 29 Aug 2026
Claude Opus 4.5 — capture 20260829T184651Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/cc1125ae129d12f28d85d38665d6a87c9367e471/evals/claude-opus-4-5.yaml |
| Fetched (UTC) | 2026-08-29T18:46:51Z |
| Upstream commit | 3 Aug 2026 — cc1125ae129d (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 3,797 bytes — not served (third-party research, archived but not republished here); the hash and timestamp proof below still establish what was published when |
| SHA-256 | 3a79fc7a682fbdeb3fa406cd01ab67870fc747244aabcf2fe28094e0f41a51f9 |
| OpenTimestamps proof | 3a79fc7a682fbdeb3fa406cd01ab67870fc747244aabcf2fe28094e0f41a51f9.yaml.20260829T184651Z.ots (calendar-attested; anchored in bitcoin over time; identical bytes were first archived on 29 Aug 2026 — that version carries the earliest attestation) |
| Wayback | not saved |
| Prior capture of this target | — first capture of this target |
Verify: obtain the file from the target address above, then sha256sum it — it must equal the hash above; the .ots proof dates that hash.
Structured facts
This is another organisation's own research, and this project does not redistribute it: the file itself is not served here; these facts still pin its identity and let any copy be authenticated against this record.
| Document size | 3,797 bytes |
|---|---|
| Canonical text SHA-256 | 88f65bb28d7d58bbd16b9ef1871e0cfb36a38b8ada29359f4af7d2bd016ed7b1 |
| Extracted text length | 435 words |