What is GPT Realtime 2
GPT Realtime 2 is an AI audio generation service that offers an instant, natural-sounding text-to-speech API and a no-registration playground. It provides a developer-ready API via OpenRouter and allows for streaming AI audio generation with multiple voice options.
How to use GPT Realtime 2
- Write the prompt: Enter or paste the text you want to convert to speech into the provided text area.
- Choose output: Select a desired voice from the available options and choose the audio format (e.g., WAV).
- Generate Audio: Click the "Generate Audio" button to process the request.
- Review audio: Play the returned audio and inspect the transcript. The JSON response can be reused in your application.
Features of GPT Realtime 2
- Instant, natural-sounding AI audio generation.
- No-registration playground for immediate testing.
- Text-to-speech API.
- Streaming AI audio generation.
- Multiple voice options (Alloy, Echo, Fable, Onyx, Nova, Shimmer).
- Developer-ready API via OpenRouter.
- Private server API route for handling API keys securely.
- Returns transcript, audio data, MIME type, provider, model, and demo status.
Use Cases of GPT Realtime 2
- Voice prototypes: Quickly create listenable voice drafts for product copy, onboarding scripts, and notifications.
- Support audio: Generate spoken answers for help centers and chat flows.
- Narration drafts: Create concepts for podcast intros, course narration, and voiceovers.
- Realtime agents: Integrate with chat workflows requiring streamed transcript and audio output.
- Creative testing: Rapidly compare voices, tones, and pacing.
- Developer demos: Validate audio UX within your own application shell.
Pricing
- Demo Mode: Free to try in the browser with no registration required. Provides demo responses when no API key is configured.
- Production Usage: Billed by your configured OpenRouter account and model route. Offers custom site experiences with features like rate limiting and usage logging.
FAQ
What is GPT Realtime 2? GPT Realtime 2 is a no-registration browser playground and private server API for testing OpenRouter's openai/gpt-audio route.
Is GPT-Realtime-2 connected to real audio generation? Yes, when OPENROUTER_API_KEY is configured on the server. Without that environment variable, the playground returns a clearly marked demo response.
Which model does the API route use? The production route calls OpenRouter's OpenAI-compatible chat completions endpoint with model openai/gpt-audio, streaming enabled, and text plus audio modalities.
Do I need an account to try the playground? No, the playground can be used without registration. Production usage depends on the site's configured OpenRouter key.
Where should the OpenRouter API key live? Keep it only in server-side environment variables (e.g., OPENROUTER_API_KEY in Vercel or a local .env.local file).
