阶跃星辰发布开源 Step 3.7 Flash(Apache 2.0),采用 MoE 架构(198B 总参/11B 活跃参),配备 MTP 辅助解码(3 个预测头),输出速度超 400 tokens/s,是同类两倍多。Artificial Analysis Intelligence Index 得分 42.6,较 Step 3.5 Flash 提升 4 分。智能体能力明显增强:GDPval-AA Elo 升至 1298,TerminalBench Hard 升至 35.6%。新增 1.8B 视觉编码器,MMMU-Pro 得分 75.3%。上下文窗口 256K tokens,提供 BF16、FP8、NVFP4 版本。缺点:AA-Omniscience 准确率仅 25.4%,幻觉率 84.4%。
Thanks @ArtificialAnlys for the detailed independent evaluation.
Step 3.7 Flash is built with a clear focus on the intelligence-speed frontier: MTP-assisted decoding, 400+ output tokens/s, stronger agentic performance, native multimodal capabilities, and Apache 2.0 open weights.
This is the direction we believe matters for production agent workloads: capable, efficient, and deployable at scale.