GPAI Ledger › Muse Spark (Meta)
Muse Spark
Public summary of training content · Article 53(1)(d), Regulation (EU) 2024/1689
Provider: Meta — status: Published
Meta publishes a public summary of training content for Muse Spark under the EU AI Act; every version this ledger has captured is archived below with its hash and timestamp proof.
AIAL metadata: summary dated 2026-07-08, model released 2026-04-08, eval page
Latest version differs from the previous one: 10 word(s) of extracted text changed between the captures of 22 Aug 2026 and 3 Sep 2026 (the comparison re-extracted both copies with one tool; the archived extracts on this site need not reproduce this count); both versions are archived below with their full text.
Version difference observed: the newest live copy and the archived third-party copy of this summary currently differ in content (text similarity 0.99). The rows below serve both — compare the extracted text of the two document versions to see the difference.
Document versions
Rows may capture the same summary from different sources or formats (the provider's site, AIAL's archived copy); sizes and hashes are comparable only within one URL.
| Capture (UTC) | Source of copy | URL | SHA-256 | Bytes | Notes |
|---|---|---|---|---|---|
| 20260903T061956Z | provider site | scontent-sin2-2.xx.fbcdn.net/m1/v/t0.841…oc=…&ccb=…&oh=…&oe=…&_nc_sid=… | 5adae941d8f2823a… | 258,570 | Meta CDN-hosted PDF (signed URL); content changed vs the previous capture of this target (10 word(s) differ in the extracted text) |
| 20260829T133054Z | AIAL archived copy | aial.ie/research/gpai-training-transpare…hive/Muse_Spark_2026_08_18.pdf | fb8e4a1daaba1538… | 257,787 | bytes identical to 20260817T085600Z |
| 20260822T073238Z | provider site | scontent-ams2-1.xx.fbcdn.net/m1/v/t0.841…oc=…&ccb=…&oh=…&oe=…&_nc_sid=… | 08e43427de4af503… | 259,322 | Meta CDN-hosted PDF (signed URL); content changed vs the previous capture of this target (15 word(s) differ in the extracted text) |
| 20260817T085600Z | provider site | scontent-mxp2-1.xx.fbcdn.net/m1/v/t0.841…oc=…&ccb=…&oh=…&oe=…&_nc_sid=… | fb8e4a1daaba1538… | 257,787 | Meta CDN-hosted PDF (signed URL) |
Watch-surface captures
Captures of the page(s) where the document is published (portals, hubs, docs pages) — monitored for change detection; not the document itself.
| Capture (UTC) | Source of copy | URL | SHA-256 | Bytes | Notes |
|---|---|---|---|---|---|
| 20260918T061302Z | provider site | transparency.meta.com/reports/regulatory-transparency-reports/ | 92e532a049697e3b… | 848,784 | rendered page (captured with a browser); page text changed vs the previous capture of this target (43 word(s) differ in the extracted text) |
| 20260821T110926Z | provider site | transparency.meta.com/reports/regulatory-transparency-reports/ | d45e518728b3cbf7… | 837,600 | rendered page (captured with a browser); captured with a different method than the previous capture (rendering, frame or consent handling changed): the extracted text differs, which is not evidence of a content change |
| 20260817T082935Z | provider site | transparency.meta.com/reports/regulatory-transparency-reports/ | 12509e1d776336e2… | 873,685 | rendered page (captured with a browser); captured with a different method than the previous capture (rendering, frame or consent handling changed): the extracted text differs, which is not evidence of a content change |
| 20260811T105149Z | provider site | transparency.meta.com/reports/regulatory-transparency-reports/ | ccf86bc0fa73ebc5… | 256,793 | page as served without JavaScript — mostly empty shell; later captures store the fully rendered page |
Third-party evaluation
The AI Accountability Lab scores published summaries against the Commission's template and publishes the result. These are captures of their assessment, archived here because they are revised over time and a score is otherwise unrecoverable once changed. It is AIAL's research judgement, not a legal determination, and not the provider's document. Their assessment is archived here but not served on this site or in the dataset: each capture below proves what was published and when, and points to AIAL for the content. Attribution: aial.ie.
| Capture (UTC) | Source of copy | URL | SHA-256 | Bytes | Notes |
|---|---|---|---|---|---|
| 20260916T074518Z | AIAL evaluation page | aial.ie/research/gpai-training-transparency/evals/meta-muse-spark/ | b02c12d156071744… | 20,721 | bytes identical to 20260831T114555Z |
| 20260916T074511Z | AIAL evaluation | raw.githubusercontent.com/AIAccountabili…ain/evals/meta-muse-spark.yaml | df4530ce622c7a31… | 4,833 | bytes identical to 20260829T143230Z |
| 20260831T114603Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | b02c12d156071744… | 20,721 | the state that stood upstream from 18 Aug 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T114555Z |
| 20260831T114555Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | b02c12d156071744… | 20,721 | the state that stood upstream from 18 Aug 2026 (fetched here on 31 Aug 2026); bytes differ from the previous capture; the extracted text is identical, so no change is visible in the text layer (the text layer does not carry checkbox or form-field state) |
| 20260831T114118Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | 721a84866a783812… | 20,717 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T114111Z |
| 20260831T114111Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | 721a84866a783812… | 20,717 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); page text changed vs the previous capture of this target (20 word(s) differ in the extracted text) |
| 20260831T113008Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | 0210847d1de2ec7d… | 20,878 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T113001Z |
| 20260831T113001Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | 0210847d1de2ec7d… | 20,878 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); page text changed vs the previous capture of this target (20 word(s) differ in the extracted text) |
| 20260831T111959Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | c54fa48e52a1368e… | 20,390 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T111953Z |
| 20260831T111953Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | c54fa48e52a1368e… | 20,390 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); bytes differ from the previous capture; the extracted text is identical, so no change is visible in the text layer (the text layer does not carry checkbox or form-field state) |
| 20260831T111740Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | 78b0bd23e1ffaf9a… | 20,723 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T111732Z |
| 20260831T111732Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | 78b0bd23e1ffaf9a… | 20,723 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); bytes differ from the previous capture; the extracted text is identical, so no change is visible in the text layer (the text layer does not carry checkbox or form-field state) |
| 20260831T110812Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | e8d89fc13fda01cd… | 20,196 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T110804Z |
| 20260831T110804Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | e8d89fc13fda01cd… | 20,196 | the state that stood upstream from 6 Aug 2026 (fetched here on 31 Aug 2026); page text changed vs the previous capture of this target (1 word(s) differ in the extracted text) |
| 20260831T110303Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | 3f6445fea41ded03… | 20,196 | the state that stood upstream from 5 Aug 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T110257Z |
| 20260831T110257Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | 3f6445fea41ded03… | 20,196 | the state that stood upstream from 5 Aug 2026 (fetched here on 31 Aug 2026); page text changed vs the previous capture of this target (4 word(s) differ in the extracted text) |
| 20260831T105650Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | 42e3de70f833f7e3… | 20,195 | the state that stood upstream from 5 Aug 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T105642Z |
| 20260831T105642Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | 42e3de70f833f7e3… | 20,195 | the state that stood upstream from 5 Aug 2026 (fetched here on 31 Aug 2026); page text changed vs the previous capture of this target (24 word(s) differ in the extracted text) |
| 20260831T104632Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | 116a47e8b5f44b66… | 20,683 | the state that stood upstream from 4 Aug 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T104624Z |
| 20260831T104624Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | 116a47e8b5f44b66… | 20,683 | the state that stood upstream from 4 Aug 2026 (fetched here on 31 Aug 2026); page text changed vs the previous capture of this target (20 word(s) differ in the extracted text) |
| 20260831T103020Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | 7572616cc5850233… | 20,195 | the state that stood upstream from 27 Jul 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T103013Z |
| 20260831T103013Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | 7572616cc5850233… | 20,195 | the state that stood upstream from 27 Jul 2026 (fetched here on 31 Aug 2026); page text changed vs the previous capture of this target (8 word(s) differ in the extracted text) |
| 20260831T102600Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | fe259e9c30c8d07f… | 20,196 | the state that stood upstream from 27 Jul 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T102553Z |
| 20260831T102553Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | fe259e9c30c8d07f… | 20,196 | the state that stood upstream from 27 Jul 2026 (fetched here on 31 Aug 2026); page text changed vs the previous capture of this target (65 word(s) differ in the extracted text) |
| 20260831T102228Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | 1c8d4b7c61fb3373… | 19,613 | the state that stood upstream from 24 Jul 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T102219Z |
| 20260831T102219Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | 1c8d4b7c61fb3373… | 19,613 | the state that stood upstream from 24 Jul 2026 (fetched here on 31 Aug 2026); bytes differ from the previous capture; the extracted text is identical, so no change is visible in the text layer (the text layer does not carry checkbox or form-field state) |
| 20260831T101733Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | 9a7b31133455815d… | 19,607 | the state that stood upstream from 24 Jul 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T101725Z |
| 20260831T101725Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | 9a7b31133455815d… | 19,607 | the state that stood upstream from 24 Jul 2026 (fetched here on 31 Aug 2026); bytes differ from the previous capture; the extracted text is identical, so no change is visible in the text layer (the text layer does not carry checkbox or form-field state) |
| 20260831T101246Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | 2e54aa58924993f9… | 19,611 | the state that stood upstream from 23 Jul 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T101240Z |
| 20260831T101240Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | 2e54aa58924993f9… | 19,611 | the state that stood upstream from 23 Jul 2026 (fetched here on 31 Aug 2026); bytes differ from the previous capture; the extracted text is identical, so no change is visible in the text layer (the text layer does not carry checkbox or form-field state) |
| 20260831T100813Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…-spark/version-2026-07-21.html | 84075b6d66950c6c… | 19,606 | the state that stood upstream from 23 Jul 2026 (fetched here on 31 Aug 2026); bytes identical to 20260831T100807Z |
| 20260831T100807Z | AIAL evaluation page | raw.githubusercontent.com/AIAccountabili…ic/evals/muse-spark/index.html | 84075b6d66950c6c… | 19,606 | the state that stood upstream from 23 Jul 2026 (fetched here on 31 Aug 2026) |
| 20260829T190948Z | AIAL evaluation (earlier state) | raw.githubusercontent.com/AIAccountabili…575fcb1f/evals/muse-spark.yaml | df4530ce622c7a31… | 4,833 | the state that stood upstream from 18 Aug 2026 (fetched here on 29 Aug 2026); bytes identical to 20260829T143230Z |
| 20260829T190609Z | AIAL evaluation (earlier state) | raw.githubusercontent.com/AIAccountabili…1196846c/evals/muse-spark.yaml | e07bf83a9fc6a10d… | 4,829 | the state that stood upstream from 6 Aug 2026 (fetched here on 29 Aug 2026); page text changed vs the previous capture of this target (13 word(s) differ in the extracted text) |
| 20260829T190457Z | AIAL evaluation (earlier state) | raw.githubusercontent.com/AIAccountabili…570f985e/evals/muse-spark.yaml | a23950aeb3119e68… | 5,142 | the state that stood upstream from 6 Aug 2026 (fetched here on 29 Aug 2026); page text changed vs the previous capture of this target (1 word(s) differ in the extracted text) |
| 20260829T190118Z | AIAL evaluation (earlier state) | raw.githubusercontent.com/AIAccountabili…b3da3415/evals/muse-spark.yaml | 6fd79d5ddb342f62… | 5,142 | the state that stood upstream from 5 Aug 2026 (fetched here on 29 Aug 2026); page text changed vs the previous capture of this target (1 word(s) differ in the extracted text) |
| 20260829T185714Z | AIAL evaluation (earlier state) | raw.githubusercontent.com/AIAccountabili…0295607a/evals/muse-spark.yaml | 6acd5daeb6d7ca70… | 5,143 | the state that stood upstream from 5 Aug 2026 (fetched here on 29 Aug 2026); page text changed vs the previous capture of this target (1 word(s) differ in the extracted text) |
| 20260829T184234Z | AIAL evaluation (earlier state) | raw.githubusercontent.com/AIAccountabili…926092aa/evals/muse-spark.yaml | 4b375d0bf3191710… | 5,143 | the state that stood upstream from 27 Jul 2026 (fetched here on 29 Aug 2026); page text changed vs the previous capture of this target (3 word(s) differ in the extracted text) |
| 20260829T183933Z | AIAL evaluation (earlier state) | raw.githubusercontent.com/AIAccountabili…57dfd3ff/evals/muse-spark.yaml | 552d833e17822963… | 5,144 | the state that stood upstream from 27 Jul 2026 (fetched here on 29 Aug 2026); page text changed vs the previous capture of this target (100 word(s) differ in the extracted text) |
| 20260829T183742Z | AIAL evaluation (earlier state) | raw.githubusercontent.com/AIAccountabili…3aed273f/evals/muse-spark.yaml | 3554c457130386b9… | 4,456 | the state that stood upstream from 23 Jul 2026 (fetched here on 29 Aug 2026) |
Captures of superseded target URLs
Locations this ledger previously tracked for this source (per-row notes give the reason each was superseded) — kept as faithful records of what those URLs served at capture time.
| Capture (UTC) | Source of copy | URL | SHA-256 | Bytes | Notes |
|---|---|---|---|---|---|
| 20260831T121201Z | AIAL evaluation page | aial.ie/research/gpai-training-transparency/evals/muse-spark/ | b02c12d156071744… | 20,721 | bytes identical to 20260831T114555Z; superseded 16 Sep 2026: AIAL's 14 Sep 2026 rename moved this evaluation's page to https://aial.ie/research/gpai-training-transparency/evals/meta-muse-spark/, which the ledger now tracks. The pre-rename path is a leftover directory in their repository: their site writes one directory per evaluation file, and no file carries the old name any more. |
| 20260829T143230Z | AIAL evaluation | raw.githubusercontent.com/AIAccountabili…ncy/main/evals/muse-spark.yaml | df4530ce622c7a31… | 4,833 | superseded 16 Sep 2026: AIAL's 14 Sep 2026 'name consistency check' renamed this evaluation file to meta-muse-spark.yaml, which the ledger now tracks; this address has answered 404 since that rename (recorded by the 14 and 15 Sep 2026 sweeps). |
| 20260820T110728Z | provider site | scontent-mxp1-1.xx.fbcdn.net/m1/v/t0.841…oc=…&ccb=…&oh=…&oe=…&_nc_sid=… | fb8e4a1daaba1538… | 257,787 | Meta CDN-hosted PDF (signed URL); bytes identical to 20260817T085600Z; duplicate target identity minted 20 Aug 2026 when Meta's CDN shard hostname rotated; bytes identical to the canonical target, which now tracks the content-addressed path only |
| 20260811T111428Z | AIAL archived copy | aial.ie/research/gpai-training-transpare…hive/Muse_Spark_2026_07_21.pdf | 6d0dce769e8b2edd… | 258,200 | superseded: AIAL corrected the archive_file_name for this model (it had pointed at Gemini_2026_07_21.pdf, another provider's document); the registry now tracks the corrected filename and this target no longer exists upstream |
Last checked: 2026-10-05 (re-checked on the daily schedule — see Methodology). Seen a summary we missed? See the contact details.