GPAI Ledger › Claude Mythos 5 / Claude Fable 5 (Anthropic) › Capture 29 Aug 2026
Claude Mythos 5 / Claude Fable 5 — capture 20260829T184907Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/38dfbd8da731954fe4eef2364736805a3eef99be/evals/claude-mythos-5-fable-5.yaml |
| Fetched (UTC) | 2026-08-29T18:49:07Z |
| Upstream commit | 3 Aug 2026 — 38dfbd8da731 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 4,085 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 | c383c209793aab0c31f777203c9c806e35e8f5a8e2e8bf4d4d1b3bece004e91d |
| OpenTimestamps proof | c383c209793aab0c31f777203c9c806e35e8f5a8e2e8bf4d4d1b3bece004e91d.yaml.20260829T184907Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | ab5159d0426e2abed0111c44a5e2bf0f74b39552c10fb3970767598237028019 (captured 2026-08-29T18:48:18Z) |
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 | 4,085 bytes |
|---|---|
| Canonical text SHA-256 | ba8df5eb925ad169c90c7381b10286606ed036a0ac286757b3b20e680d5b4361 |
| Extracted text length | 531 words |