GPT Realtime Mini

Available routes

GPT Realtime Mini runs on 1 route through the Opper gateway. Compare residency, zero data retention and training posture at a glance, with full data-handling detail per route below.

Uptime and availability

GPT Realtime Mini runs on a single route through the Opper gateway today, so its availability is that provider's availability.

Data handling per route

Each route hosting GPT Realtime Mini has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

Get started

Call GPT Realtime Mini through the Opper gateway with one API key. Realtime models run over a WebSocket at wss://api.opper.ai/v3/realtime: open it, send session.start with this model, then stream audio both ways.

See the Opper realtime quickstart, the realtime protocol and the Opper multimodal skill.

GPT Realtime Mini is a premium model on Opper. Sign up needs no credit card: you get an API key straight away and the free models work in the playground and the API. Add a card to use premium models, pay-as-you-go with no minimum.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

1import WebSocket from "ws";
2
3const ws = new WebSocket("wss://api.opper.ai/v3/realtime", {
4  headers: { Authorization: `Bearer ${process.env.OPPER_API_KEY}` },
5});
6
7ws.on("open", () => {
8  ws.send(JSON.stringify({
9    type: "session.start",
10    config: {
11      model: "openai/gpt-realtime-mini",
12      voice: "alloy",
13      instructions: "You are a concise voice assistant.",
14    },
15  }));
16});
17
18// Stream microphone audio in with { type: "audio.append", audio: <base64 PCM16> }
19ws.on("message", (raw) => {
20  const ev = JSON.parse(raw.toString());
21  if (ev.type === "audio.delta") {
22    // ev.audio is base64 PCM16: play it
23  }
24});