StepFun

StepFun released Step 5 Preview as open weights, with BF16 and FP8 versions on Hugging Face and ModelScope.

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StepFun made Step 5 Preview available on OpenRouter, with a week of free access rolling out across several coding tools.

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StepFun open-sourced onPanda, its internal tool for annotating LLM training data and inspecting model outputs token by token.

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StepFun released Step Code v0.1.0, an open-source command line tool under the MIT License that covers coding, testing and publishing static sites.

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StepFun introduced Step 5 Preview, a new flagship model for agentic work with 600B total and 27B active parameters, 1M context and vision.

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StepFun and ACE Studio released StepAudio 3 Music, StepFun's first music generation model, which turns a prompt and lyrics into a complete song.

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StepFun launched StepAudio 3, a family of 5 audio models for real-time voice, speech recognition, speech generation, audio generation and music, available now.

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