All Models

StepAudio 2.5 TTS

step

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

Providers2
ReleasedApr 16, 2026
Input Modalitiestext
Output Modalitiesaudio

Available Providers (2)

ProviderModel IDInput CostOutput CostContextMax OutputDocs
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