GPAI Ledger › Claude Mythos 5 / Claude Fable 5 (Anthropic) › Capture 29 Aug 2026
Claude Mythos 5 / Claude Fable 5 — capture 20260829T185438Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/06ddb124fa2483d962c846bc0ea88b030295607a/evals/claude-mythos-5-fable-5.yaml |
| Fetched (UTC) | 2026-08-29T18:54:38Z |
| 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 | 4,979 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 | c9fb8d76bd6dc92d9e6b307b5a99d21f731ea98c99b066972dabab3eb596211d |
| OpenTimestamps proof | c9fb8d76bd6dc92d9e6b307b5a99d21f731ea98c99b066972dabab3eb596211d.yaml.20260829T185438Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 2ddb6e6baad37fa15cdd0d4367bf3e36063eec55527b6376f931a680653e04ba (captured 2026-08-29T18:51:41Z) |
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 | 4,979 bytes |
|---|---|
| Canonical text SHA-256 | ca72b8611dbe267caac27c348de50610333c68e50627c023d3c30bff83220a6e |
| Extracted text length | 648 words |