GPAI Ledger › Claude Opus 5 (Anthropic) › Capture 31 Aug 2026
Claude Opus 5 — capture 20260831T103700Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation page — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/38dfbd8da731954fe4eef2364736805a3eef99be/public/evals/claude-opus-5/index.html |
| Fetched (UTC) | 2026-08-31T10:37:00Z |
| Upstream commit | 3 Aug 2026 — 38dfbd8da731 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 19,415 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 | 4e8defa99d8e19a10b188c4328d8480188473cd63312ee64d04752ae205108b9 |
| OpenTimestamps proof | 4e8defa99d8e19a10b188c4328d8480188473cd63312ee64d04752ae205108b9.html.20260831T103700Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 9c7c4a049a26ed7e304bf4a5a9e5f1d561bde83729a905054d80233a48721c70 (captured 2026-08-31T10:32:03Z) |
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 | 19,415 bytes |
|---|---|
| Canonical text SHA-256 | ec467ec3e380474715cd94d1fe0062dcfad89afe5efac79083bc0d8b79862842 |
| Extracted text length | 679 words |