GPAI Ledger › Claude Mythos 5 / Claude Fable 5 (Anthropic)
Claude Mythos 5 / Claude Fable 5
Public summary of training content · Article 53(1)(d), Regulation (EU) 2024/1689
Provider: Anthropic — status: Published
Anthropic publishes a public summary of training content for Claude Mythos 5 / Claude Fable 5 under the EU AI Act; every version this ledger has captured is archived below with its hash and timestamp proof.
AIAL metadata: summary dated 2026-07-24, model released 2026-06-09, eval page
Anthropic publishes this model's summary inside its trust center; the document is also captured in the Anthropic trust-center bundle.
Document versions
| Capture (UTC) | Source of copy | URL | SHA-256 | Bytes | Notes |
|---|---|---|---|---|---|
| 20260811T102525Z | AIAL archived copy | aial.ie/research/gpai-training-transpare…ythos_5_Fable_5_2026_08_03.pdf | 765afb9d4e62fa40… | 289,309 |
Watch-surface captures
Captures of the page(s) where the document is published (portals, hubs, docs pages) — monitored for change detection; not the document itself.
| Capture (UTC) | Source of copy | URL | SHA-256 | Bytes | Notes |
|---|---|---|---|---|---|
| 20260817T082322Z | provider site | trust.anthropic.com/resources | 76c2f3bf16214ed8… | 216,234 | rendered page (captured with a browser); content changed vs the previous capture of this target |
| 20260811T102430Z | provider site | trust.anthropic.com/resources | 4c3d597e28e68975… | 6,949 | page as served without JavaScript — mostly empty shell; later captures store the fully rendered page |
Last checked: 2026-08-21 (re-checked on the daily schedule — see Methodology). Seen a summary we missed? See the contact details.