Provenance Record

Well-structured News piece (Overview / What We Know / What We Don't Know) at 681 words, within the 400-1200 word News range. Every specific figure and quote is inline-attributed to a named source. Prose is clear and avoids marketing language even when paraphrasing Apple's own promotional copy.

All 6 source snapshots read in full from sources/2026-08/apples-m6-and-m5-ultra-chips-debut-a-new-core-ai-framework-for-on-device-model-training/ (source-0.html.gz through source-5.html.gz); sha256 of each decompressed file matches manifest.json. source-0 (Apple Newsroom, M6/M5 Ultra chip release) confirms verbatim: 'M6, Apple's first 2 nm chip' (headline/subhead) and 'M6 also introduces a Dual 16-core Neural Engine, providing up to 2x the peak compute over previous generations'. source-1 (Apple Newsroom, Mac Studio release) confirms verbatim: 'M5 Ultra is Apple's first quad-die architecture' (subhead), 'Its up-to-80-core GPU, the most powerful Apple silicon GPU ever, brings Neural Accelerators to the Ultra chip for the first time', 'With M5 Ultra, Mac Studio achieves up to 4.3x the peak AI compute performance of M3 Ultra and a staggering 9.8x more than M1 Ultra', the full Core AI and MLX descriptions, and Mac Studio pricing ($2,499 / $5,499) and the 512GB-in-late-October detail. source-2 (Apple Newsroom, Mac mini release) confirms the 32GB/170GB/s Mac mini memory specs and September 22 availability. source-3 (9to5Mac) confirms verbatim 'The M6 is Apple's first 2-nanometer chip, which the company says increases transistor density and power efficiency' and, critically, that the 4.4TB/s inter-die-bandwidth / 6x-connection-density figure is 9to5Mac's own paraphrase of the UltraFusion release, not an Apple quote -- the article correctly attributes this line to 9to5Mac rather than presenting it as Apple's words. source-4 (MacRumors, Mac mini) confirms verbatim 'the first-ever dual Neural Engine' and the 12-core CPU/GPU (up from 10-core) comparison and $899/$1,699 pricing. source-5 (MacRumors, Mac Studio) confirms verbatim 'the new Mac Studio with the M5 Ultra supports up to 512GB of unified memory and up to 1.2TB/s of memory bandwidth'. No snapshot fetch failed (all file fields populated, all status_code 200); no WebFetch fallback was needed. manifest.json suspicious_patterns is null for all 6 sources -- no injection-attempt content found, nothing to override.

Both attribution issues the contributor bot flagged as self-corrected were independently re-verified against the raw snapshots and confirmed fixed: (1) the 4.4TB/s/6x-connection-density figure is presented in the article as 'according to 9to5Mac,' not inside an Apple attribution, and the source text confirms it is 9to5Mac's own sentence rather than a quoted Apple statement; (2) the 'brings Neural Accelerators to the Ultra chip for the first time' quote is attributed to the Mac Studio press release (source-1) and appears there verbatim -- it is not present in the M6/M5-Ultra chip release (source-0), so the earlier misattribution is genuinely corrected. No hallucinated quotes found; every quoted string in body_markdown was located verbatim in its cited snapshot. No orphan source: all 6 article.sources URLs are cited in body_markdown and vice versa.

Clean, well-sourced News piece. All specifics and direct quotes trace verbatim to their cited snapshots, the two previously self-corrected attribution errors are confirmed genuinely fixed, and the 'What We Don't Know' section appropriately flags that Apple's performance multipliers come from Apple's own pre-production internal testing. Approved without corrections.