Hugging Face
- StepFun Step 5 Preview: announced Sept 20, weights visible on the Oct 15 plan
- Meta opens Muse Spark Open weights: an 816B multimodal MoE with 1M context, licensed with a separate deal for big model-service providers
- A week of open weights: from a Flash bump to an 816B MoE, licenses and channels matter more than parameter counts
- NVIDIA: fine-tuned Nemotron 3 reaches gold-medal level at IMO 2026 and IOI 2026, with checkpoints and training data released
- Ai2 open-sources AstaBrief, a research-report model that can run locally and averages about 51 seconds per cited report
- H Company releases Holo4, open-weight computer-use agent models that operate interfaces, write code and call MCP/APIs with one model