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It’s here! After the WAIC announcement, StepFun has just dropped Step 3 🔥 their latest multimodal reasoning model on the hub.
Paper: Step-3 is Large yet Affordable: Model-system Co-design for Cost-effective Decoding (2507.19427)
Model: stepfun-ai/step3
✨ 321B total / 32B active - Apache 2.0
✨ MFA + AFD : cutting decoding cost by up to 70% vs. DeepSeek-V3
✨ 4T image-text pretraining: strong vision–language grounding
✨ Modular, efficient, deployable: runs on just 8×48GB GPUs
Paper: Step-3 is Large yet Affordable: Model-system Co-design for Cost-effective Decoding (2507.19427)
Model: stepfun-ai/step3
✨ 321B total / 32B active - Apache 2.0
✨ MFA + AFD : cutting decoding cost by up to 70% vs. DeepSeek-V3
✨ 4T image-text pretraining: strong vision–language grounding
✨ Modular, efficient, deployable: runs on just 8×48GB GPUs