GPAI Ledger › Claude Opus 5 (Anthropic) › Capture 31 Aug 2026
Claude Opus 5 — capture 20260831T111214Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation page — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/6da9b3fc0d502cd8720a20cd4e9a4f0ce6f8b451/public/evals/claude-opus-5/index.html |
| Fetched (UTC) | 2026-08-31T11:12:14Z |
| Upstream commit | 6 Aug 2026 — 6da9b3fc0d50 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 20,508 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 | 1bee952cbecca8bd8b2abba899e7e367ee022a7269fb391790bd43a1c41c7bbb |
| OpenTimestamps proof | 1bee952cbecca8bd8b2abba899e7e367ee022a7269fb391790bd43a1c41c7bbb.html.20260831T111214Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 5034434e00b1cd19276d6decee8362e7e6289f1118e059c083a7f4b5809de753 (captured 2026-08-31T11:04:20Z) |
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 | 20,508 bytes |
|---|---|
| Canonical text SHA-256 | a3998dc19b53857dfc0732295483dfbc8873ff3f94c0ad192493fb0fcc4ed512 |
| Extracted text length | 791 words |