SourcesArcee Trinity Large — Open 400B Sparse MoE 13B ActiveArcee AI·high signalXBlueskyLinkedInCopy linkLargest 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 threadPolicy dependency / Stack layerArcee open-sources NAC, an agent harness built around 'episodes' instead of one growing transcriptArcee AI BlogStack layerArcee AI Open-Sourced 'nac', a Long-Running Agent Harness, and Argues Harnesses Are Becoming a New Kind of Inference RuntimeArcee AI BlogPolicy dependency / Stack layerUS Will Tell Partner Nations to Pick a Side in the AI Race, Threatening Exclusion From the Pax Silica Coalitionr/LocalLLaMA (Reuters, via CNBC and Japan Times)Stack layer / Contrastwatermarks-remover v0.5.0 Turned an Agent Skill Into a Self-Hosted HTTP Service — and Documented a 9,894-vs-12 Token Reasoning BlowupGitHubStack layer / Threat patternllama.cpp b10451 Adds a Bounds Check on LoRA Tensor Data — Untrusted Adapter Files Could Read Past File Endllama.cpp (GitHub)Stack layer / Update threadPattern: Runtime Lag, Not Weight Availability, Is Now the Binding Constraint on Open-Weight Frontier ModelsGitHub / r/LocalLLaMA / GitHub ChangelogPolicy dependency / Stack layerCROSS-CATEGORY: Five Vendors in Ten Days Shipped the Same Product — a Gateway That Sits Between Your Apps and Your Agents and Meters ThemHelp Net Security (A10, SelectHub; corroborated by Snowflake's engineering blog, GlobeNewswire/AI-R Aug 10, and harnessrouter.ai)Stack layer / ContrastQwen ships Qwen3.8-27B under Apache 2.0 — a 27.8B dense multimodal model claiming 61.7% on SWE-Bench ProAI Release Tracker