SourcesArcee Trinity Large — Open 400B Sparse MoE 13B ActiveArcee AI·high signalLargest open-weight US model. 400B total, 13B active. 87.2 MMLU. Apache 2.0. Trained in 33 days on 2048 B300s for ~20M.SourceSource pageArcee AI↳ Follow the threadStack layer / Threat patternMeta Stands Up a Cloud Business to Sell AI Compute — CoreWeave Stock Drops 14%The Motley FoolStack layer / Threat patternAirflowAttack Fools Infrared Remote-Sensing VLMs With Physical PerturbationsarXivStack layer / Threat patternUnit 42 and Zscaler catch web-based indirect prompt injection tricking AI agents into crypto payments in the wildUnit 42 (Palo Alto Networks)Stack layer / Update threadJim Fan: NVIDIA Open-Sources ASPIRE, and 'the Training Output Changes From Model Weights to a Continuously Expanding Skill Library'BigGo FinanceStack layer / Update threadSimon Willison Flags Tencent's Hy3 — a 295B Apache-2.0 Open MoE That Rivals GLM-5.2 and DeepSeek-V4, Free on OpenRouter Until July 21simonwillison.netStack layer / Follow-up threadArthur Mensch Teases a 'Fat but Sparse' MoE Family, Opening July Early Access for Research and Government PartnersX/Twitter (Arthur Mensch)Stack layer / Threat patternCritical Langflow Vulnerability (CVE-2026-10134) Exposes All Process Secrets to AttackersThreat-Modeling.comStack layer / ContrastChinese Open Models Take Up to 46% of US Developer Token Use as Costs SurgeCNBC