GPAI Ledger › Claude Opus 4.6 (Anthropic) › Capture 29 Aug 2026
Claude Opus 4.6 — capture 20260829T142319Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/main/evals/claude-opus-4-6.yaml |
| Fetched (UTC) | 2026-08-29T14:23:19Z |
| Stored file | 3,797 bytes — not served (third-party research, archived but not republished here); the hash, timestamp proof and Wayback witness below still establish what was published when |
| SHA-256 | b4d3e607bcac86f3e3e5b4ecc93279438cb89a32504cdd35918734234cbb558d |
| OpenTimestamps proof | b4d3e607bcac86f3e3e5b4ecc93279438cb89a32504cdd35918734234cbb558d.txt.20260829T142319Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | Wayback snapshot, 2026-08-29 14:41 UTC |
| Prior capture of this target | — first capture of this target |
Verify: obtain the file from the target address above, or from the Wayback snapshot below, 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 | 3,797 bytes |
|---|---|
| Canonical text SHA-256 | 20808211af732f618c7ccf82655b807926e226d5a40b5ff094b1e8a871543a15 |
| Extracted text length | 435 words |