GPAI Ledger › Claude Mythos Preview (Anthropic) › Capture 29 Aug 2026
Claude Mythos Preview — capture 20260829T184825Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/e358c0273a50a424019d5b1f4d36878280e445c3/evals/claude-mythos-preview.yaml |
| Fetched (UTC) | 2026-08-29T18:48:25Z |
| Upstream commit | 3 Aug 2026 — e358c0273a50 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 4,091 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 | 28d343ead36b45c41a1cfd14fa041d5e37591fa18c824ed1c98b72457d85ecaf |
| OpenTimestamps proof | 28d343ead36b45c41a1cfd14fa041d5e37591fa18c824ed1c98b72457d85ecaf.yaml.20260829T184825Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | ec2ebb9f030a2f742c451ca177153c44e33989326c156fb2b2629dc78516c0b6 (captured 2026-08-29T18:45:36Z) |
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 | 4,091 bytes |
|---|---|
| Canonical text SHA-256 | 9651932bc9f29e827de5eca79bfe125c9790935b9430291b166393c629a2f604 |
| Extracted text length | 531 words |