Stepfun News
Latest news, updates, and announcements from Stepfun.
StepFun's Step 5 Preview Climbs to Global No. 2 Open-Source Model, Passing Kimi K3
StepFun's newest flagship model, Step 5 Preview, moved from third to second place on Artificial Analysis' global open-source Intelligence Index in a single day, per the leaderboard's September 20 upda...
StepFun releases Step 5 Preview, claims top-3 global open-source rank at a fraction of Claude Opus 5's cost
StepFun (阶跃星辰) released Step 5 Preview on September 20, a new flagship base model built for real-world agentic work — coding, software engineering, professional knowledge tasks, and finance. The model...
StepFun launches StepAudio 3, claiming top Artificial Analysis voice ranks
On September 15, StepFun released its StepAudio 3 speech-model family—Realtime, ASR, TTS, Gen, and Music—spanning full-duplex conversation, speech recognition, human-like synthesis, multi-element audi...
StepFun separates its foundation model and agent-device businesses, moving its phone business into a...
StepFun separates its foundation model and agent-device businesses, moving its phone business into a separate company while the original entity continues operating the model business. The company is a...
Stepfun (阶跃星辰) announced the launch of STEPX, billed as the world's first AI-native terminal brand,...
Stepfun (阶跃星辰) announced the launch of STEPX, billed as the world's first AI-native terminal brand, along with Step AOS, an agentic-native operating system. The company also debuted the STEPX Neo, the...
Step AI unveils world's first agentic-native OS, Step AOS, and personal AI agent Amoo.
On July 13, 2026, Step AI (阶跃星辰) held a launch event in Shanghai to unveil Step AOS (Step Agentic-native OS), a new operating system designed from the ground up for AI agents, alongside a personal AI...
Stepfun releases Step Edge on-device model family for phones and cars
Chinese AI lab Stepfun (阶跃星辰) has introduced Step Edge, a new family of on-device AI models designed to run directly on smartphones and automotive systems. The model family targets edge inference for...
StepFun (阶跃星辰) has launched StepAudio 2.5 Realtime, a next-generation real-time voice foundation mod...
StepFun (阶跃星辰) has launched StepAudio 2.5 Realtime, a next-generation real-time voice foundation model. The model claims industry-leading deep perception capabilities, including detection of tone, spe...
StepFun, backed by state capital and Tencent, is dismantling its Cayman‑based red‑chip structure to...
StepFun, backed by state capital and Tencent, is dismantling its Cayman‑based red‑chip structure to meet new CSRC guidance and clear the path for a Hong Kong IPO slated for June. The company aims to r...
StepFun has secured 717 million USD in Series B+ funding, surpassing the recent Hong Kong IPO procee...
StepFun has secured 717 million USD in Series B+ funding, surpassing the recent Hong Kong IPO proceeds of rivals Zhipu AI and MiniMax. This 5 billion yuan round marks a strategic shift toward deep har...