Skip to content
OpenAI

GPT-Realtime-1.5

GPT-Realtime-1.5 is OpenAI's flagship audio model for voice agents and customer support, handling speech-to-speech conversation with stronger instruction following and more reliable tool calling than earlier realtime preview models.

index.ts
import { gateway } from '@ai-sdk/gateway';


export async function POST() {
  const { token, url } = await gateway.experimental_realtime.getToken({
    model: 'openai/gpt-realtime-1.5',
  });


  return Response.json({ token, url, tools: [] });
}
OverviewAboutProvidersSimilarFAQ

About GPT-Realtime-1.5

GPT-Realtime-1.5 launched on February 23, 2026 as OpenAI's flagship realtime audio model for voice agents and customer support. Compared with earlier realtime preview models, GPT-Realtime-1.5 delivers stronger instruction following, more reliable tool calling, and better voice quality.

Speech-to-speech is the defining design choice. Rather than chaining transcription, a text model, and speech synthesis, GPT-Realtime-1.5 processes audio natively and responds in audio. That cuts latency and produces responses that sound more natural. Tool calling works during live conversation, so a voice agent can check a calendar or query a database while the caller is still talking.

GPT-Realtime-1.5 also enacts specified roles reliably, following instructions to hold a particular personality or tone. That consistency makes GPT-Realtime-1.5 practical for branded support experiences and scripted workflows at scale.