GPAI Ledger › Claude Opus 4.8 (Anthropic) › Capture 29 Aug 2026
Claude Opus 4.8 — capture 20260829T184549Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/53df02af107f3a461902c76956ffd4bcb4a99afc/evals/claude-opus-4-8.yaml |
| Fetched (UTC) | 2026-08-29T18:45:49Z |
| Upstream commit | 3 Aug 2026 — 53df02af107f (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 3,911 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 | 8100a0f7fc811185d1e45397f6f8648bb259c8649541492195555bdd1e811397 |
| OpenTimestamps proof | 8100a0f7fc811185d1e45397f6f8648bb259c8649541492195555bdd1e811397.yaml.20260829T184549Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | ba0f9d44c3ec266dcb69823966203ae4c58ea0e7156180a194dd9ffc8b8ecccf (captured 2026-08-29T18:43:09Z) |
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 | 3,911 bytes |
|---|---|
| Canonical text SHA-256 | b28660496674174a6c9b16b26c5128f18cbc91f70467c0456129f267d84a2da3 |
| Extracted text length | 435 words |