GPAI Ledger › Claude Opus 5 (Anthropic) › Capture 29 Aug 2026
Claude Opus 5 — capture 20260829T185813Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/e23043c1a1254414a190531d23dca9b8b3da3415/evals/claude-opus-5.yaml |
| Fetched (UTC) | 2026-08-29T18:58:13Z |
| Upstream commit | 5 Aug 2026 — e23043c1a125 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 4,948 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 | 79a5b5d87f62cf0abd456aaf562cb724aa90588305509cfe50b7c1ec04acd286 |
| OpenTimestamps proof | 79a5b5d87f62cf0abd456aaf562cb724aa90588305509cfe50b7c1ec04acd286.yaml.20260829T185813Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 63438146da997bbcc0922aaff26f99f3b64f109b3b043e8a5d4ffee92d448866 (captured 2026-08-29T18:55:03Z) |
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 | 4,948 bytes |
|---|---|
| Canonical text SHA-256 | ca2b73b529555f347036060e3ed9f1b222d6b47954fd51f993229b603affc27f |
| Extracted text length | 644 words |