AssemblyAI TTS 1 is AssemblyAI's text to speech model. A text-to-speech model from AssemblyAI designed for generating natural-sounding synthetic voice audio.
Specifications
Canonical IDassemblyai-tts-1
TypeText to Speech
StatusActive
CreatorAssemblyAIAssemblyAI
Input ModalitiesText
Output ModalitiesAudio
Benchmarks
Elo Rating
#52

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
Inworld Realtime TTS 2————Available
Realtime TTS-2————Available
Realtime TTS-2 Research Preview————Available
Soniox TTS 2 RT————Available
Step TTS 2————Available
StyleTTS 2————Available
TTS HD 2.5————Available
VoxCPM2————Available
TTS 1—$15.00—Deprecating
TTS 1 HD—$30.00—Deprecating
AssemblyAI TTS 1————Current

Model IDs

assemblyai-tts-1