GPAI Ledger › Claude Mythos Preview (Anthropic) › Capture 29 Aug 2026
Claude Mythos Preview — capture 20260829T185752Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/e23043c1a1254414a190531d23dca9b8b3da3415/evals/claude-mythos-preview.yaml |
| Fetched (UTC) | 2026-08-29T18:57:52Z |
| Upstream commit | 5 Aug 2026 — e23043c1a125 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 4,966 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 | 162d8142b7a493042430d1da8a82030abcc1e8fd19512b8fb5140dd547d03624 |
| OpenTimestamps proof | 162d8142b7a493042430d1da8a82030abcc1e8fd19512b8fb5140dd547d03624.yaml.20260829T185752Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 5d97e2fc76b2a842734c955b3ae72a6c213d361e5af250b9fe5da6e7321e62f9 (captured 2026-08-29T18:54:45Z) |
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 | 4,966 bytes |
|---|---|
| Canonical text SHA-256 | 358cefb5dd8fb8be17771f312b18ccb6f7c2c6dfb73db67f3a43db52a0800eb1 |
| Extracted text length | 644 words |