GPAI Ledger › Claude Opus 4.8 (Anthropic) › Capture 29 Aug 2026
Claude Opus 4.8 — capture 20260829T185201Z
| Provider | Anthropic |
|---|---|
| Target | AIAL evaluation (earlier state) — https://raw.githubusercontent.com/AIAccountabilityLab/gpai-training-transparency/fb0dc932d4685c18e0fd0d590eb52bbeb1ceb783/evals/claude-opus-4-8.yaml |
| Fetched (UTC) | 2026-08-29T18:52:01Z |
| Upstream commit | 4 Aug 2026 — fb0dc932d468 (when this state began to stand in the upstream repository; this archive fetched it at the time above, not then) |
| Stored file | 4,949 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 | 32232db22f1c6a3ca71306c57350fc64d47f410ba93034d9c359167e640f4894 |
| OpenTimestamps proof | 32232db22f1c6a3ca71306c57350fc64d47f410ba93034d9c359167e640f4894.yaml.20260829T185201Z.ots (calendar-attested; anchored in bitcoin over time) |
| Wayback | not saved |
| Prior capture of this target | bf55e291a75bc6e5c5281c9e52362911843732d366c27c281ca0e98a21cbf50d (captured 2026-08-29T18:49:26Z) |
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 | 4,949 bytes |
|---|---|
| Canonical text SHA-256 | b8b2249897baab3cf1b1bb67c5cb6529f5e98adc8626072b3e9164a81d536c13 |
| Extracted text length | 644 words |