GPAI Ledger › Claude Opus 4.8 (Anthropic) › Capture 31 Aug 2026
Claude Opus 4.8 — capture 20260831T104837Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation page — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/fb0dc932d4685c18e0fd0d590eb52bbeb1ceb783/public/evals/claude-opus-4-8/index.html |
| Fetched (UTC) | 2026-08-31T10:48:37Z |
| 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 | 20,192 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 | d9eed854057acdc525f29504b14e06a4888ce45990bb37500f9da3b27ef710bb |
| OpenTimestamps proof | d9eed854057acdc525f29504b14e06a4888ce45990bb37500f9da3b27ef710bb.html.20260831T104837Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 78320b513d377c8256e2d4f5ef9c8ae845ce29363c7c8c94ab09c7022d1cb6a6 (captured 2026-08-31T10:36:53Z) |
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 | 20,192 bytes |
|---|---|
| Canonical text SHA-256 | b9d46f481033219434cf922274383fb88b3ea38d63a43b0284f29ed5af9f0018 |
| Extracted text length | 780 words |