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This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: Introducing Step 3.7 Flash: multimodal reasoning at scale Announcing our Series F . 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Learn more AI models Introducing Step 3.7 Flash: multimodal reasoning at scale StepFun's Step 3.7 Flash is now available in the Baseten Model Library in a hardware-efficient configuration. Authors Albert Lee Last updated July 14, 2026 Share TL;DR StepFun's Step 3.7 Flash, a 198-billion-parameter sparse MoE vision-language model, is now available in the Baseten Model Library in a hardware-efficient configuration (lower cost per token, smoother autoscaling). We're excited to welcome StepFun to the Baseten Model Library! StepFun is doing incredible work building frontier-scale foundation models across text, vision, audio, and reasoning. Step 3.7 Flash is StepFun’s debut model in our library, and we can't wait to see how teams use it. Why Step 3.7 Flash matters Step 3.7 Flash is StepFun's flagship multimodal reasoning model. Here's what makes it stand out: Efficient architecture: A highly efficient, sparse MoE architecture (198B total parameters / 11B activated parameters). 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