StepFun(@StepFun_ai):Step 5 Preview is now open weights. BF16 and FP8 weights are live on Hugging Face and ModelScope, together with our technical blog. • Sparse MoE: 600B total, 27B active per token • 1M-token context window • Native text and vision input • Built for long-horizon agentic work: coding, software engineering, professional knowledge work and finance Frontier intelligence, open weights. Build what's next. Hugging Face: https://t.co/nMfayf37ja ModelScope: https://t.co/mkB3qIoMQA GitHub:

StepFun

@StepFun_ai

Scale-up possibilities for everyone. API Platform: HuggingFace:

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StepFun@StepFun_ai

2026.10.15 13:00

Step 5 Preview is now open weights. BF16 and FP8 weights are live on Hugging Face and ModelScope, together with our technical blog. • Sparse MoE: 600B total, 27B active per token • 1M-token context window • Native text and vision input • Built for long-horizon agentic work: coding, software engineering, professional knowledge work and finance Frontier intelligence, open weights. Build what's next. Hugging Face: ModelScope: GitHub:

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