GPAI Ledger › Claude Opus 5 (Anthropic) › Capture 29 Aug 2026
Claude Opus 5 — capture 20260829T184556Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/53df02af107f3a461902c76956ffd4bcb4a99afc/evals/claude-opus-5.yaml |
| Fetched (UTC) | 2026-08-29T18:45:56Z |
| Upstream commit | 3 Aug 2026 — 53df02af107f (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 3,907 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 | 278cf1ba7e1ef7553b8d232c5eeb5bc38924a95eed72ecf23d42fdd300034960 |
| OpenTimestamps proof | 278cf1ba7e1ef7553b8d232c5eeb5bc38924a95eed72ecf23d42fdd300034960.yaml.20260829T184556Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 770abc68be70cfffc0cd1e2aa3155a031214871ddd61cea97fbbda4b1c27a24f (captured 2026-08-29T18:43:17Z) |
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 | 3,907 bytes |
|---|---|
| Canonical text SHA-256 | 94e7e60de94c354b5757e6688ba42ceb20d6d29c82b29086a9ff004237e068fe |
| Extracted text length | 435 words |