Overview
GPT-4o-mini-TTS is a state-of-the-art text-to-speech (TTS) model built on the GPT-4o mini architecture. It transforms text into high-quality, realistic speech featuring natural intonation and expressiveness. The model offers robust multilingual support and customizable voice parameters, making it ideal for diverse TTS applications.
Technical Specifications
- Model Type: Based on GPT-4o mini architecture optimized for text-to-speech
- Style Control: Customizable tone, emotion, pacing, accent via prompt instructions
- Delivery Modes: Supports synchronous and streaming audio generation
Performance Benchmarks
- Realistic voice quality with natural prosody and intonation tested on standard TTS datasets
- Low latency enabling real-time interaction with average streaming delay under 100ms
- High intelligibility scores across 40+ international languages
- Voice customization parameters result in expressive and emotionally varied outputs
- Robust multilingual performance validated in noisy and accented speech synthesis environments
Key Features
- Converts text to speech with natural, human-like intonation
- Supports 11 built-in voices spanning multiple styles and genders
- Covers more than 40 languages and dialects (according to Whisper language list)
- Adjustable accent, emotion, intonation, speed, and timbre settings
- Outputs audio in MP3, WAV, OPUS, FLAC, PCM, and other formats
- Enables real-time speech synthesis and streaming audio support
- Multi-language support with seamless voice switching
API Pricing
- Input: $0,63 / 1M tokens
- Output: $12,60 / 1M tokens
Use Cases
- Voice assistants and conversational agents requiring natural multilingual speech
- Audiobook and e-learning content generation with adjustable emotion and pace
- Accessibility tools for visually impaired users needing realistic speech output
- Real-time communication aids and live broadcast voice synthesis
- Custom voice branding and multimedia voiceover production
Code Sample
Comparison with Other Models
vs Google WaveNet: Google WaveNet offers extremely high-fidelity audio but lacks GPT-4o-mini’s broad language and customization flexibility. GPT-4o-mini-TTS enables adjustable emotional intonation and real-time streaming, which WaveNet generally does not support.
vs OpenAI Whisper TTS: Whisper TTS focuses primarily on speech recognition with limited TTS development, while GPT-4o-mini-TTS specializes in expressive, multi-language speech synthesis with multiple voice options.
vs Amazon Polly: Amazon Polly provides many voices and languages but is less flexible in real-time streaming and fine control of emotional parameters compared to GPT-4o-mini-TTS. GPT-4o-mini-TTS offers richer customization and open domain adaptability.
vs Microsoft Azure TTS: Azure TTS delivers competitive quality but may have higher latency. GPT-4o-mini-TTS excels in low-latency streaming and supports a larger number of languages and voice customizations.
API Integration
Accessible via AI/ML API. Documentation: available here.