Moonshot's 2.8T-parameter Kimi K3 weights land on Hugging Face
Moonshot AI has published Kimi K3's full 2.8-trillion-parameter weights under a Modified MIT license — the largest open-weight model release to date.
Open Source — Category
Kuaishou's KAT-Coder-V2.5 tops PinchBench with open Dev variant
Kuaishou's KwaiKAT team says its new agentic coder, trained by RL in 100,000+ verifiable repository environments, edges Claude Opus 4.8 on PinchBench.
Open Dreamer rebuilds Dreamer 4 in JAX with full training recipe
Research group Reactor has released a JAX/Flax reproduction of DeepMind's Dreamer 4 pipeline, publishing the full recipe and the stability fixes that made it train.
US said to favor selective bans on Chinese open models
Reporting indicates the White House is leaning toward targeting specific Chinese open-weight models on security grounds rather than a blanket prohibition.
Nvidia, Microsoft, Meta urge US to spare open models
Over 20 tech firms including Nvidia, Microsoft and Meta signed a letter warning Washington that broad open-weight curbs would push AI innovation offshore.
OpenAI joins open-weights letter, signatories reach 35
After conspicuously sitting out the industry's open-weights appeal to Washington, OpenAI has added its name, pushing the coalition to 35 organizations.
StepFun brings Attention-FFN disaggregation to vLLM
StepFun says it is open-sourcing its Attention-FFN disaggregation work with the vLLM team, Ant Group and FastAFD, pushing a key MoE-serving efficiency technique into the community.
Andrew Ng releases OpenWorker, an open-source desktop agent
Andrew Ng shipped an MIT-licensed, local-first desktop agent that plans tasks across files and apps and hands back finished deliverables instead of chat.
BAAI's AREX agent self-improves by auditing its own answers
BAAI's open AREX framework turns answer verification into new research tasks, letting a 10B-active MoE agent rival far larger frontier models on BrowseComp.
DeepSeek V4 goes GA with 1M context as legacy APIs retire
DeepSeek's flagship V4 line exits preview: legacy chat and reasoner endpoints shut down today as new peak and off-peak API pricing takes effect.
Cisco open-sources tiny Antares models to locate code flaws
Cisco's Foundation AI arm releases 350M and 1B open-weight models that trace known vulnerabilities to specific files, nearing frontier accuracy at a fraction of the cost.
Poolside's Laguna S 2.1 tops open-weight agentic coding class
Poolside released Laguna S 2.1, a 118B MoE coding model with 1M context under an open license, hitting 78.5% on SWE-Bench Multilingual with only 8B active params.
NVIDIA ships Cosmos 3 Edge, a 4B world model for on-device robots
NVIDIA open-sourced Cosmos 3 Edge, a 4B-parameter world model that reasons and generates robot actions locally, hitting 15 Hz real-time control on Jetson Thor.
Moonshot pauses Kimi K3 signups as demand outstrips GPUs
Moonshot AI halted new Kimi K3 subscriptions after demand surged sixfold, as third-party tests put the open-weight model within reach of Claude Fable 5.