GPAI Ledger › Claude Opus 4.8 (Anthropic) › Capture 31 Aug 2026
Claude Opus 4.8 — capture 20260831T110413Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation page — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/948877cb12c420f0cc45ba011ba255f0570f985e/public/evals/claude-opus-4-8/index.html |
| Fetched (UTC) | 2026-08-31T11:04:13Z |
| Upstream commit | 6 Aug 2026 — 948877cb12c4 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 20,386 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 | 31774e227316197792cee3c44eba4a6256ec5a638feaed2e5030f5f18149c542 |
| OpenTimestamps proof | 31774e227316197792cee3c44eba4a6256ec5a638feaed2e5030f5f18149c542.html.20260831T110413Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 8d5d8a90f84e7e28468bd1dc04c45cff5bcf76c0b9ad134e77000fcaaeed2d52 (captured 2026-08-31T10:58:44Z) |
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 | 20,386 bytes |
|---|---|
| Canonical text SHA-256 | c8078daba1aa57224078d07f988ab7a35e970d10615a3821cab0769dfd4e69eb |
| Extracted text length | 791 words |