Provenance Record

Well-structured News piece (405 words, within 400-1200) with Overview, What We Know, What We Don't Know, and a short Analysis. Attribution is explicit and hedged appropriately (benchmark figures flagged as reported, not independently replicated).

Read all three snapshots from disk (gunzip). source-0.html.gz (VentureBeat, Carl Franzen, 6:30 pm PT Sept 21 2026): verbatim confirms the quoted sentence 'has arrived as the top-performing open-weight model in the world on third-party benchmarking firm Artificial Analysis' Intelligence Index, scoring 46'; 'MiMo-V2.6-Pro is open weight, MIT-licensed'; download free off Hugging Face; Pro 1.02T total/42B active; Flash sparse MoE 310B total/15B active; 'more than 7,000 RL task environments' and 'MiMo-V2.6-Distill-Qwen-9B, a smaller model distilled from MiMo RL trajectories'; pricing Pro $0.435/$0.87 and Flash $0.14/$0.28 per million tokens. It also says Pro is ahead of Grok 4.6 (44) and Gemini 3.8 Flash and level with Grok 4.7 (also 46), so the 'top open-weight' ranking claim holds (ranking is among open-weight models). The snapshot does NOT state that Flash is MIT-licensed; it says Xiaomi is releasing 'Pro and Flash model weights'. source-1.html.gz (SiliconANGLE, updated 10:45 EDT Sept 22 2026, 'today announced'): confirms 46.32 on the Artificial Analysis Intelligence Index, 'ahead of Kimi K3 and Qwen3.8 Max, the highest-ranked open-source/open-weight model in that comparison at launch'; the quoted phrase 'text, image, video and audio in the same family, with 1 million-token context windows' is verbatim; AutomationBench 53.1 vs 50.3, Agents' Last Exam 31.6 (tying Opus 5), Terminal Bench 2.1 89.9 vs 89.1; Pro-UltraSpeed up to 20x faster; Xiaomi claim of roughly one-20th to one-60th of overseas model cost; Pro $0.435/$0.87 and Flash $0.14/$0.28. source-2.html.gz (mimo.mi.com update log, not in allowlist, but it is the primary vendor page): lists '2026-09-22 MiMo-V2.6 Series Release' with mimo-v2.6-pro, mimo-v2.6-flash and mimo-v2.6-pro-ultraspeed. The article uses it only for the Sept 22 date and the three model names, and correctly discloses that the page does not give license terms, exact parameter counts or pricing (the page only says 'trillion-parameter' for Pro). All manifest sha256 entries were unchanged; no snapshot failed.

Every checked number traces to a cited source: Intelligence Index score 46 (VentureBeat) and 46.32 (SiliconANGLE), the 'top open-weight' ranking (both), MIT license for Pro (VentureBeat), Sept 22 2026 release date (Xiaomi update log and SiliconANGLE; VentureBeat's byline is Sept 21 PT, consistent with a Sept 22 announcement). One defect: the headline says Xiaomi released 'Pro and Flash as MIT-Licensed Open-Weight Models', implying Flash is also MIT-licensed; the sources only state that for Pro. Flash is confirmed open-weight only.

Substantively accurate, well-sourced release story. One recoverable headline overstatement is covered by a single correction.