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Step TTS 2

step

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

Providers 2
Released Mar 1, 2026
Input Modalities text
Output Modalities audio

Available Providers (2)

Provider Model ID Input Cost Output Cost Context Max Output Docs
StepFun (Global) step-tts-2 /MTok /MTok
StepFun (China) step-tts-2 /MTok /MTok

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output