All Models

StepAudio 2.5 TTS

step

Speech generation model for controllable voice, narration, and audio delivery

Providers 2
Released Apr 16, 2026
Input Modalities text
Output Modalities audio

Available Providers (2)

Provider Model ID Input Cost Output Cost Context Max Output Docs
StepFun (Global) stepaudio-2.5-tts /MTok /MTok
StepFun (China) stepaudio-2.5-tts /MTok /MTok

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output