It delivers smoother, faster, and more conversational speech experiences, making it an ideal choice for developers building next-gen voice-driven products.
- Real-Time App Developers: Ideal for apps that need on-the-fly responses, like customer support bots or AI companions.
- Conversational AI Creators: Build natural-sounding dialogue systems with virtually zero lag.
- Accessibility Platform Builders: Enable real-time screen reading or narration for visually impaired users.
- EdTech & eLearning Providers: Power engaging, responsive learning experiences with voice-driven content.
- Voice-Enabled Products: Create voice interfaces for IoT devices, kiosks, or embedded systems.
- Game Developers: Give characters real-time voice responses and enhance immersion.
🤖 How Does It Work?
- Step 1: Use Streaming Endpoint: Access the /v1/audio/speech endpoint with the voice and model set to tts-1-hd.
- Step 2: Enable Streaming Mode: Activate the streaming feature to receive partial audio chunks in real time.
- Step 3: Pass Input Text: Input user-generated or dynamically created text that you want converted to speech.
- Step 4: Process Audio on the Fly: Play back audio as it arrives, without waiting for the full response to complete.
- Step 5: Integrate Seamlessly: Combine with tools like Whisper, GPT-4o, or your own application logic to create interactive, spoken experiences.
- Ultra-Low Latency Streaming: Speech is generated as you go, not after the entire text is processed.
- Hyper-Realistic Output: Uses the latest speech synthesis tech to produce near-human, expressive voices.
- Built for Real-Time Interactions: Tailored for fast-paced scenarios like conversations, virtual agents, and real-time narration.
- Multiple Voices Available: Choose from OpenAI’s best-in-class voice library (e.g., nova, shimmer).
- Smooth API Experience: Easily accessible through OpenAI’s standard developer API.
- Seamless GPT Integration: Pairs perfectly with GPT-4o for true multimodal voice-based AI.
- Incredible Real-Time Voice Generation: Streams high-quality speech instantly as the text flows.
- Optimized for Conversations: Feels like you're talking to a person, not a machine.
- Easily Integrates into Apps: Works with standard HTTP streaming and audio playback tools.
- Ideal for Accessibility Use Cases: Great for live content narration and screen reading.
- Built to Pair with GPT-4o: Enables full-duplex AI agents that listen, think, and speak instantly.
- Limited Customization: You can’t yet fine-tune emotional tone, pitch, or speed.
- Multilingual Support Still Growing: Works best in English; support for other languages is limited.
- No Voice Cloning or Custom Voices: Only prebuilt voices available—no custom training or cloning.
- Requires Handling Streaming Logic: Integration may need more engineering effort vs. standard TTS.
- Costs Can Stack Up: Real-time streaming is compute-heavy and may impact budget at scale.
1 million tokens
$ 30.00
Output: Audio only
Endpoints: v1/audio/speech (Speech generation), plus Chat Completions, Responses, Realtime, Assistants, and Batch.
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Editorial Note
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