GPAI Ledger › Claude Opus 5 (Anthropic) › Capture 29 Aug 2026
Claude Opus 5 — capture 20260829T185207Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/fb0dc932d4685c18e0fd0d590eb52bbeb1ceb783/evals/claude-opus-5.yaml |
| Fetched (UTC) | 2026-08-29T18:52:07Z |
| Upstream commit | 4 Aug 2026 — fb0dc932d468 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 4,945 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 | 6b2899a86e1f8545b23f6a77a890dd2517a2dfa6c1f8aa3380f109cb3546b6e5 |
| OpenTimestamps proof | 6b2899a86e1f8545b23f6a77a890dd2517a2dfa6c1f8aa3380f109cb3546b6e5.yaml.20260829T185207Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 13fdba59438ad586b7d9fd84b8715287bf04524f08fe8bb3cb0bc5362ac0ee74 (captured 2026-08-29T18:49:34Z) |
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 | 4,945 bytes |
|---|---|
| Canonical text SHA-256 | 421d201cc3914c7df19952345c49a77d09811f708bce9d2ab8c578565da632ac |
| Extracted text length | 644 words |