GPAI Ledger › Claude Opus 4.8 (Anthropic) › Capture 29 Aug 2026
Claude Opus 4.8 — capture 20260829T185457Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/06ddb124fa2483d962c846bc0ea88b030295607a/evals/claude-opus-4-8.yaml |
| Fetched (UTC) | 2026-08-29T18:54:57Z |
| Upstream commit | 5 Aug 2026 — 06ddb124fa24 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 4,953 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 | c8b4bb6d1ac392e63235f9f0a1a6bb2cd062871d5751fc7cd21cf2e69f1336ea |
| OpenTimestamps proof | c8b4bb6d1ac392e63235f9f0a1a6bb2cd062871d5751fc7cd21cf2e69f1336ea.yaml.20260829T185457Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 32232db22f1c6a3ca71306c57350fc64d47f410ba93034d9c359167e640f4894 (captured 2026-08-29T18:52:01Z) |
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 | 4,953 bytes |
|---|---|
| Canonical text SHA-256 | 692d5957c0360b93270aedc48728a09ad9c8d5c236df9da120bd228ee664a246 |
| Extracted text length | 644 words |