GPAI Ledger › Claude Mythos Preview (Anthropic) › Capture 29 Aug 2026
Claude Mythos Preview — capture 20260829T184536Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/53df02af107f3a461902c76956ffd4bcb4a99afc/evals/claude-mythos-preview.yaml |
| Fetched (UTC) | 2026-08-29T18:45:36Z |
| 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 | 3,925 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 | ec2ebb9f030a2f742c451ca177153c44e33989326c156fb2b2629dc78516c0b6 |
| OpenTimestamps proof | ec2ebb9f030a2f742c451ca177153c44e33989326c156fb2b2629dc78516c0b6.yaml.20260829T184536Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | a2a7d40794aa53017b9a3c2933771c0c10fc6a25233648871c6126b1d0dd0f0f (captured 2026-08-29T18:42:54Z) |
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 | 3,925 bytes |
|---|---|
| Canonical text SHA-256 | 6e29a90273c2d94dab0823125a8730100a8b284c3c0c399534546192df5c477f |
| Extracted text length | 435 words |