Releases from frontier labs, major companies and research institutes — grouped by model, deduplicated across HuggingFace, OpenRouter and official blogs.
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StepFun🇨🇳Major lab
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional...
StepFun🇨🇳Major lab
201B multimodal open-weights model from StepFun — underrated in the West. Image+text input, strong reasoning. Successor to Step 3.5 Flash (199B). $0.20/$1.15 per MTok on OpenRouter.