GPAI Ledger › Claude Opus 5 (Anthropic) › Capture 29 Aug 2026
Claude Opus 5 — capture 20260829T142358Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/main/evals/claude-opus-5.yaml |
| Fetched (UTC) | 2026-08-29T14:23:58Z |
| Stored file | 4,958 bytes — not served (third-party research, archived but not republished here); the hash, timestamp proof and Wayback witness below still establish what was published when |
| SHA-256 | 286ae8f472832d79ccb088a4e314edc832ec6bec7beda1bf4f1932991fe322e3 |
| OpenTimestamps proof | 286ae8f472832d79ccb088a4e314edc832ec6bec7beda1bf4f1932991fe322e3.txt.20260829T142358Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | Wayback snapshot, 2026-08-29 15:04 UTC |
| Prior capture of this target | — first capture of this target |
Verify: obtain the file from the target address above, or from the Wayback snapshot below, 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 | 4,958 bytes |
|---|---|
| Canonical text SHA-256 | a425b16e08bab507c9b6d7f4adb524b5aa9383c3bc90e547adf95a02ad892c24 |
| Extracted text length | 644 words |