GPAI Ledger › Claude Opus 5 (Anthropic) › Capture 31 Aug 2026
Claude Opus 5 — capture 20260831T113422Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation page — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/4c332ff3420ed7bf1328d384d4b53bbfe3489f9d/public/evals/claude-opus-5/index.html |
| Fetched (UTC) | 2026-08-31T11:34:22Z |
| Upstream commit | 6 Aug 2026 — 4c332ff3420e (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 20,845 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 | 26f03dc67c223b5ddff1fc388caad18758c7daa88dd218744e0952857249747b |
| OpenTimestamps proof | 26f03dc67c223b5ddff1fc388caad18758c7daa88dd218744e0952857249747b.html.20260831T113422Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | a73bedfc12947c49ab095a7232168eb9b2d849b8f4ed5a42413cb8a0ce504d0e (captured 2026-08-31T11:21:18Z) |
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 | 20,845 bytes |
|---|---|
| Canonical text SHA-256 | 81d03396ba2f1373dc2ed70c6e865f4af8d025caadde927b2312377a652939b5 |
| Extracted text length | 792 words |