GPAI Ledger › Claude Opus 5 (Anthropic) › Capture 29 Aug 2026
Claude Opus 5 — capture 20260829T184934Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/38dfbd8da731954fe4eef2364736805a3eef99be/evals/claude-opus-5.yaml |
| Fetched (UTC) | 2026-08-29T18:49:34Z |
| 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 | 4,073 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 | 13fdba59438ad586b7d9fd84b8715287bf04524f08fe8bb3cb0bc5362ac0ee74 |
| OpenTimestamps proof | 13fdba59438ad586b7d9fd84b8715287bf04524f08fe8bb3cb0bc5362ac0ee74.yaml.20260829T184934Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 95aff6a296e57a73ac3e5abdcbf6fc7d002c026198dc30f89aa00c3192a04ecf (captured 2026-08-29T18:48:48Z) |
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 | 4,073 bytes |
|---|---|
| Canonical text SHA-256 | a93903638e96300df7300eee41e395e0b48c1700912829dd546c10dd23bd0deb |
| Extracted text length | 531 words |