GPT Realtime 1.5

GPT Realtime 1.5 responds to audio and text inputs in realtime over WebRTC, WebSocket, or SIP connections.

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Input price: $4.40
Output price: $17.60

Context: 32K
Max output: 4K

30-day uptime: —

Released: 2026-02-23

InputTextAudioImageOutputTextAudio

Providers

This model is served by the dedicated providers below. We pick the provider for each request, so provider preferences don’t apply, including a provider named in your request. Prices in USD per 1M tokens. Need a custom setup? Contact [email protected].

DedicatedInput$4.40Output$17.60Cache read$0.44Context32KMax output4KThis model is served by a dedicated set of providers. We pick the provider for each request, and you pay the same price whichever one serves it.

Included providers1

SuccessTTFT
OpenAIUnited States——

Pricing

Prices for this model. Each request is billed at these prices, whichever provider serves it.

Input: $4.40; per 1M tokens
Output: $17.60; per 1M tokens
Cache read: $0.44; per 1M tokens
Audio input: $35.20; per 1M tokens
Audio cache read: $0.44; per 1M tokens
Audio output: $70.40; per 1M tokens
Image input: $5.50; per 1M tokens
Image cache read: $0.55; per 1M tokens

Try it

Talk to the model live on your balance. Each reply is billed as it finishes, and your browser will ask for the microphone.

{
  "type": "realtime",
  "model": "openai/gpt-realtime-1.5",
  "audio": {
    "input": {
      "transcription": {
        "model": "gpt-4o-mini-transcribe"
      }
    },
    "output": {
      "voice": "marin"
    }
  }
}

// EPHEMERAL_KEY: mint one on your server with POST /v1/realtime/client_secrets
const peer = new RTCPeerConnection();
const speaker = new Audio();
speaker.autoplay = true;
peer.ontrack = (event) => {
  speaker.srcObject = event.streams[0];
};

const microphone = await navigator.mediaDevices.getUserMedia({ audio: true });
peer.addTrack(microphone.getTracks()[0], microphone);
const events = peer.createDataChannel("oai-events");
events.onmessage = (event) => console.log(JSON.parse(event.data));

await peer.setLocalDescription(await peer.createOffer());
const form = new FormData();
form.set("sdp", peer.localDescription.sdp);
form.set("session", JSON.stringify({
  type: "realtime",
  model: "openai/gpt-realtime-1.5",
  audio: {
    input: { transcription: { model: "gpt-4o-mini-transcribe" } },
    output: { voice: "marin" },
  },
}));
const response = await fetch("https://api.ohmygpt.com/v1/realtime/calls", {
  method: "POST",
  headers: { Authorization: "Bearer " + EPHEMERAL_KEY },
  body: form,
});
await peer.setRemoteDescription({ type: "answer", sdp: await response.text() });

Start a call to hear the model and see both sides live.

Billed per reply. Hanging up stops billing.

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