GPAI Ledger › Claude Opus 5 (Anthropic) › Capture 31 Aug 2026
Claude Opus 5 — capture 20260831T105851Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation page — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/e23043c1a1254414a190531d23dca9b8b3da3415/public/evals/claude-opus-5/index.html |
| Fetched (UTC) | 2026-08-31T10:58:51Z |
| Upstream commit | 5 Aug 2026 — e23043c1a125 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 20,380 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 | 83c771c0745e0659d1eb8718942f3c45ea9e51253a012d014d267e3223fb4c34 |
| OpenTimestamps proof | 83c771c0745e0659d1eb8718942f3c45ea9e51253a012d014d267e3223fb4c34.html.20260831T105851Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | 0ca9fb0aaa1fdc97840509f24701158e8641612ddc6443a075562cdde6bd8299 (captured 2026-08-31T10:53:31Z) |
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 | 20,380 bytes |
|---|---|
| Canonical text SHA-256 | f5f8577bde3f2de562c5fbcb60d18661c981e1dcded7655f312e7e5fe22c4ba8 |
| Extracted text length | 791 words |