GPAI Ledger The public record of EU AI Act training-data summaries

GPAI Ledger › Claude Mythos 5 / Claude Fable 5 (Anthropic) › Capture 31 Aug 2026

Claude Mythos 5 / Claude Fable 5 — capture 20260831T105304Z

ProviderAnthropic
TargetAIAL evaluation page — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/06ddb124fa2483d962c846bc0ea88b030295607a/public/evals/claude-mythos-5-fable-5/index.html
Fetched (UTC)2026-08-31T10:53:04Z
Upstream commit5 Aug 2026 — 06ddb124fa24 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then)
Stored file20,429 bytes — not served (third-party research, archived but not republished here); the hash and timestamp proof below still establish what was published when
SHA-2564b38b796a579fd15d77479314e8587d164b1e3b629198c9fff7355aa5d725989
OpenTimestamps proof4b38b796a579fd15d77479314e8587d164b1e3b629198c9fff7355aa5d725989.html.20260831T105304Z.ots (calendar-attested; anchored in bitcoin over time)
Waybacknot saved
Prior capture of this target732865b787fbe85f52024144f1a7da5d1a6e0a8bd688bfc8f07530e48af5fcd0 (captured 2026-08-31T10:48:14Z)

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 size20,429 bytes
Canonical text SHA-2563214af03d9101749150e7ec8e7cab6024f850a71f4a566d7baf34e4d81e15e4e
Extracted text length799 words