GPAI Ledger › Claude Opus 4.8 (Anthropic) › Capture 31 Aug 2026
Claude Opus 4.8 — capture 20260831T103155Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation page — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/e358c0273a50a424019d5b1f4d36878280e445c3/public/evals/claude-opus-4-8/index.html |
| Fetched (UTC) | 2026-08-31T10:31:55Z |
| Upstream commit | 3 Aug 2026 — e358c0273a50 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 12,700 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 | b6f867170d1cfd469f8acd76a451e2028c59b4065d2eacbc2469b009c62a5de7 |
| OpenTimestamps proof | b6f867170d1cfd469f8acd76a451e2028c59b4065d2eacbc2469b009c62a5de7.html.20260831T103155Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | — first capture of this target |
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 | 12,700 bytes |
|---|---|
| Canonical text SHA-256 | 4c76e66a0f9efa49ca46cf7a9c26df363af774e4ef3487a62f9caba01cec0ec5 |
| Extracted text length | 332 words |