GPAI Ledger › Claude Opus 5 (Anthropic) › Capture 31 Aug 2026
Claude Opus 5 — capture 20260831T112127Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation page — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/a3575567d55d0b1e4744c902cf7806232eaef55d/public/evals/claude-opus-5/version-2026-08-04.html |
| Fetched (UTC) | 2026-08-31T11:21:27Z |
| Upstream commit | 6 Aug 2026 — a3575567d55d (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 20,518 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 | a73bedfc12947c49ab095a7232168eb9b2d849b8f4ed5a42413cb8a0ce504d0e |
| OpenTimestamps proof | a73bedfc12947c49ab095a7232168eb9b2d849b8f4ed5a42413cb8a0ce504d0e.html.20260831T112127Z.ots (calendar-attested; anchored in bitcoin over time; identical bytes were first archived on 31 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 | 20,518 bytes |
|---|---|
| Canonical text SHA-256 | 81d03396ba2f1373dc2ed70c6e865f4af8d025caadde927b2312377a652939b5 |
| Extracted text length | 792 words |