GPT Realtime 2
Try it free
AI Audio Generation

GPT Realtime 2: Instant AI Audio Generation

Transform text into natural-sounding speech with a no-registration playground. GPT-Realtime-2 streams transcript and audio responses through an OpenRouter-ready API route.

Audio Playground

Try GPT Realtime 2 instantly — no registration required

Natural voices

Six distinct AI voices with human-like intonation and emotion.

Instant generation

Streaming audio responses with transcript feedback.

Developer ready

Simple REST API with SDKs for every major language.

Use cases

Build audio workflows around GPT Realtime 2.

GPT-Realtime-2 is useful wherever teams need fast speech generation, transcript feedback, and a clear path from playground test to API integration.

Voice prototypes

Turn product copy, onboarding scripts, and notification text into listenable voice drafts.

Support audio

Generate concise spoken answers for help centers, chat flows, and multilingual support queues.

Narration drafts

Create podcast intros, course narration, and short-form voiceover concepts before studio recording.

Realtime agents

Pair GPT-Realtime-2 with chat workflows that need streamed transcript and audio output.

Creative testing

Compare voice, tone, and pacing quickly without signing up before the first generation.

Developer demos

Use the OpenRouter model route to validate GPT Realtime 2 audio UX inside your own app shell.

Workflow

From text to playable audio in one request.

The landing page stays honest in demo mode and becomes a real OpenRouter audio generator as soon as the production environment receives the private API key.

Step 1

Write the prompt

Paste the line, script, or product message you want GPT Realtime 2 to speak.

Step 2

Choose output

Pick a voice and format, then send the request through the local /api/generate route.

Step 3

Stream through OpenRouter

When OPENROUTER_API_KEY is configured, the route calls openai/gpt-audio and collects PCM16 SSE chunks.

Step 4

Review audio

Play the returned audio, inspect the transcript, and reuse the JSON response in your app.

Pricing and limits

Start free, connect OpenRouter when ready.

GPT-Realtime-2 demo mode costs nothing. Real audio generation is billed by your configured OpenRouter account and model route.

Demo

For quick browser tests without registration.

$0
site experience
Prompt to transcript demo
Voice and format controls
No account gate
Clear demo-mode disclosure

OpenRouter

For real GPT Realtime 2 audio generation.

Usage
provider billing
openai/gpt-audio route
Server-side API key
Streaming audio chunks
Transcript plus audio JSON

Production

For apps that need reliability controls.

Custom
site experience
Rate limiting
Prompt templates
Usage logging
Fallback and error handling
Developer API

A small route you can inspect and extend.

The public UI talks to a server route that keeps the OpenRouter key private. The route returns transcript, base64 audio, MIME type, provider, model, and demo state.

POST /api/generate
{
  "prompt": "Welcome to GPT Realtime 2.",
  "voice": "alloy",
  "format": "wav"
}

Private key handling

Set OPENROUTER_API_KEY only in local or Vercel environment variables. It is never needed in browser code.

Streaming audio response

The OpenRouter request uses model openai/gpt-audio with text and audio modalities, streams PCM16 chunks, then wraps the response as WAV for browser playback.

GPT Realtime 2 FAQ

Clear answers about GPT-Realtime-2, demo mode, OpenRouter setup, and the audio API.

GPT Realtime 2 is the product experience on this site for testing OpenRouter's openai/gpt-audio route through a no-registration browser playground and a private server API.
Yes when OPENROUTER_API_KEY is configured on the server. Without that private environment variable, the playground returns a clearly marked demo response instead of pretending to generate real audio.
The production route calls OpenRouter's OpenAI-compatible chat completions endpoint with model openai/gpt-audio, streaming enabled, text plus audio modalities, and PCM16 audio output wrapped as WAV for playback.
No. The first-screen playground can be used without registration. Production usage still depends on the site's configured OpenRouter key and provider availability.
Keep it only in server-side environment variables such as OPENROUTER_API_KEY in Vercel or a local .env.local file that is excluded from Git and deployments.
Yes. The /api/generate response is JSON with transcript, audioBase64, audioMimeType, provider, model, and demo fields, so it can be adapted into your own voice UI.

Try GPT Realtime 2 audio now.

Generate a demo transcript instantly, then add OPENROUTER_API_KEY to enable GPT-Realtime-2 audio output.

Open playground