GPAI Ledger › Claude Opus 4.8 (Anthropic) › Capture 29 Aug 2026
Claude Opus 4.8 — capture 20260829T185806Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/e23043c1a1254414a190531d23dca9b8b3da3415/evals/claude-opus-4-8.yaml |
| Fetched (UTC) | 2026-08-29T18:58:06Z |
| 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 | 4,952 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 | 09ca67ef01d015e694b127ee4025c01b22b48af87f67c75a01354aec839e92e5 |
| OpenTimestamps proof | 09ca67ef01d015e694b127ee4025c01b22b48af87f67c75a01354aec839e92e5.yaml.20260829T185806Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | c8b4bb6d1ac392e63235f9f0a1a6bb2cd062871d5751fc7cd21cf2e69f1336ea (captured 2026-08-29T18:54:57Z) |
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 | 4,952 bytes |
|---|---|
| Canonical text SHA-256 | f749c6888989ff44686e344629edfbf187d089e4edc73b9cb715f2a3f0827b71 |
| Extracted text length | 644 words |