0.63
12.6
Voice Generation
Active

GPT-4o mini TTS

By enabling dynamic control over voice attributes like accent and emotion, this model surpasses many traditional TTS systems in naturalness and user customization.
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GPT-4o mini TTS

GPT-4o-mini-TTS leverages the GPT-4o mini transformer-based architecture, optimized for speech synthesis.

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.

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