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Step TTS 2


Step TTS 2 is StepFun logoStepFun's text to speech model. A text-to-speech model from StepFun delivering natural-sounding voice synthesis for a range of applications.
Spec
Canonical IDstep-tts-2
TypeText to Speech
StatusActive
CreatorStepFunStepFun
Input ModalitiesText
Output ModalitiesAudio
Elo Rating
1151
#65

Capabilities

Input1/5
Text
Image·
Audio·
Video·
PDF·
Output1/5
Text·
Image·
Audio
Video·
Embedding·
Capabilities0/13
Reasoning·
Adaptive Reasoning·
Function Calling·
Parallel Function Calling·
Structured Outputs·
Native JSON Schema·
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Step TTS 2Current
StyleTTS 2Available
Inworld TTS 1.5 MaxAvailable
Inworld TTS 1.5 MiniAvailable
Inworld TTS 1 MaxAvailable
TTS-1$0.000$0.000Available
TTS-1 HD$0.000$0.000Available
Inworld TTS 1Available
LMNTAvailable
Microsoft TTSAvailable
Microsoft TTS HDAvailable

Model IDs