Using StepAudio 2.5 Realtime on StepFun

Quick Start

1. 1
   Create an account at StepFun and generate an API key.
2. 2
   Use the StepFun SDK or REST API to call step-2.5-realtime — see the documentation for request format.

Code Examples

About StepFun

StepFun is a Chinese AI company providing API access to its Step series of large language and multimodal models.

Pricing on StepFun

Capabilities

About StepAudio 2.5 Realtime

StepAudio 2.5 Realtime is StepFun's end-to-end real-time conversational voice model. It handles speech input and produces speech output through a single unified architecture with no intermediate ASR/TTS pipeline steps. Key capabilities include persona-consistent roleplay via dedicated RLHF training on million-scale persona data, paralinguistic comprehension (detecting and responding to tone, emotion, and speaking rate), and low-latency dialogue. Supports Chinese and English. Available via WebSocket API (step-2.5-realtime). Analogous in function to OpenAI's GPT Realtime models.