GPAI Ledger › Claude Opus 4.8 (Anthropic) › Capture 29 Aug 2026
Claude Opus 4.8 — capture 20260829T184309Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/fb04f913855123fef5480e30e9d7ee55eb455a82/evals/claude-opus-4-8.yaml |
| Fetched (UTC) | 2026-08-29T18:43:09Z |
| Upstream commit | 3 Aug 2026 — fb04f9138551 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 3,901 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 | ba0f9d44c3ec266dcb69823966203ae4c58ea0e7156180a194dd9ffc8b8ecccf |
| OpenTimestamps proof | ba0f9d44c3ec266dcb69823966203ae4c58ea0e7156180a194dd9ffc8b8ecccf.yaml.20260829T184309Z.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 | 3,901 bytes |
|---|---|
| Canonical text SHA-256 | 4dc850e852d79af81a196aa395e29a76a628716b973c595f1118f51b548a901c |
| Extracted text length | 435 words |