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Step-Audio-TTS-3B

Parameters
3B
Published
Feb 14, 2025

Step-Audio-TTS-3B is an AI model developed by StepFun (China), first published in February 2025. It works in the speech domain, on tasks such as text-to-speech (tts) and speech synthesis.

Epoch AI has no training-compute estimate for this model. The model has 3,000,000,000 parameters.

Access: Open weights (unrestricted). Its weights are openly available.

Full record
Organization
StepFun
Country of organization
China
Domain
Speech
Task
Text-to-speech (TTS), Speech synthesis
Parameters
3,000,000,000
Model accessibility
Open weights (unrestricted)
Open weights
Yes
More from StepFun
SourceEpoch AI, 'AI Models'. Published online at epoch.ai. Retrieved 2026-07-29 from https://epoch.ai/data/ai-models. Licensed under CC BY 4.0.
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