GPAI Ledger › Claude Mythos Preview (Anthropic) › Capture 29 Aug 2026
Claude Mythos Preview — capture 20260829T184254Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/fb04f913855123fef5480e30e9d7ee55eb455a82/evals/claude-mythos-preview.yaml |
| Fetched (UTC) | 2026-08-29T18:42:54Z |
| 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 | 3,915 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 | a2a7d40794aa53017b9a3c2933771c0c10fc6a25233648871c6126b1d0dd0f0f |
| OpenTimestamps proof | a2a7d40794aa53017b9a3c2933771c0c10fc6a25233648871c6126b1d0dd0f0f.yaml.20260829T184254Z.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 | 3,915 bytes |
|---|---|
| Canonical text SHA-256 | 24ddae1a84817393fbd55d5e18db9b0aaf36f6af8a38c0cd3b9e3b28f98a7364 |
| Extracted text length | 435 words |