GPAI Ledger › Claude Opus 4.8 (Anthropic) › Capture 31 Aug 2026
Claude Opus 4.8 — capture 20260831T113415Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation page — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/4c332ff3420ed7bf1328d384d4b53bbfe3489f9d/public/evals/claude-opus-4-8/version-2026-08-04.html |
| Fetched (UTC) | 2026-08-31T11:34:15Z |
| 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 | 20,851 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 | 5b498fe4831e021df93da075a86446ab4b181c0080dbcb59424606b5de9c3b65 |
| OpenTimestamps proof | 5b498fe4831e021df93da075a86446ab4b181c0080dbcb59424606b5de9c3b65.html.20260831T113415Z.ots (calendar-attested; anchored in bitcoin over time; identical bytes were first archived on 31 Aug 2026 — that version carries the earliest attestation) |
| Wayback | not saved |
| Prior capture of this target | 7234dbe6fd6fbb1166cc9764f08df1a28fcd0c82d5fbebea36403f1e4c97b1b7 (captured 2026-08-31T11:21:10Z) |
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 | 20,851 bytes |
|---|---|
| Canonical text SHA-256 | 0a99716a9621fd9f5519cf47f9dda863ffd304594895a3fe5972766803042555 |
| Extracted text length | 792 words |