Aug 28, 2025 · The official release of OpenAI's GPT-realtime and Realtime API marks an important milestone in voice AI technology. Personally, I went a step further and tried to implement function Realtime Communicate with a multimodal model in real time over low latency interfaces like WebRTC, WebSocket, and SIP. SIP is a protocol used to make phone calls over the internet. Lower latency Aug 29, 2025 · OpenAI 表示，目前 gpt-realtime 模型能夠捕捉笑聲等非語言信號，支持對話過程中中途切換語言，還可調整語音語氣 —— 例如實現“帶法國口音的友好語調”或“語速較快的專業語調”。 Before you begin, you'll need an OpenAI API key - create one in the dashboard here. For Cerebras, 2026 is shaping up to be an extraordinary year. Sep 10, 2025 · Title: Example of Asterisk + OpenAI Realtime Call Assistant Category: API Tags: api, realtime, speech, asterisk Hi everyone 👋, I’m exploring how to build a real-time call assistant using Asterisk + OpenAI Realtime SIP API. We explore the massive upgra Tried OpenAI’s New GPT Realtime API: Better Than ElevenLabs? In this video, we dive deep into OpenAI’s newly released GPT Realtime API, which is now production-ready (General Availability). Azure OpenAI GPT Realtime API for speech and audio is part of the GPT-4o model family that supports low-latency, "speech in, speech out" conversational interactions. Join us in shaping the future of Aug 28, 2025 · OpenAI’s Realtime API enables developers to use a native speech-to-speech model. This is a simple demonstration of more advanced, agentic patterns built on top of the Realtime API. When the call connects, the AI is fantastic. A powerful framework for building realtime voice AI agents 🤖🎙️📹 - GitHub - salonisngh/agents-assignment: A powerful framework for building realtime voice AI agents 🤖🎙️📹 Learn how to connect to the Realtime API using SIP. It’s great for quick deployment and strong voice branding. Now, it’s fully possible to call your bot using any SIP-compatible PBX. This requires an audio sample and a previously uploaded consent recording. Sep 1, 2025 · The company’s Realtime API – an API designed to help developers build live, low-latency AI experiences in real time – is now generally available and supports remote MCP servers, image inputs, and phone calling through Session Initiation Protocol (SIP), making voice agents more capable through access to additional context and tools. ChatGPT helps you get answers, find inspiration, and be more productive. We notify customers of upcoming retirements for each deployment in the following ways: We notify customers at model launch by programmatically designating a not sooner than retirement date. Enhanced voices & lower pricing! Aug 28, 2025 · The Realtime API is officially out of beta and ready for your production voice agents! We’re also introducing gpt-realtime—our most advanced speech-to-speech model yet—plus new voices and API capabilities: 🔌 Remote MCPs 🖼 Image input 📞 SIP phone calling ♻ Reusable prompts gpt-realtime was trained with customers to excel at real-world tasks like support, personal assistance Nov 26, 2025 · In this comprehensive technical blog, we'll explore the architecture, implementation, and production deployment of a Python-based SIP gateway that bridges traditional telephony infrastructure with Azure's cutting-edge Voice Live real-time conversation API. Whether you are a developer looking 6 days ago · Cerebras adds a dedicated low-latency inference solution to our platform. On October 1st, OpenAI introduced their Realtime API. 13 hours ago · OpenAI plans to focus on “practical adoption” of AI in 2026, according to a blog post from CFO Sarah Friar. OpenAI SIP Voice Agent registers as a SIP endpoint via PJSIP, bridges audio between your PBX and OpenAI’s realtime or legacy voice APIs, and streams responses back to callers without leaving your telephony domain. Aug 28, 2025 · Session Initiation Protocol (SIP) support: Connect your apps to the public phone network, PBX systems, desk phones, and other SIP endpoints with direct support in the Realtime API. The stack handled live phone calls end-to-end: SIP/PSTN ingress, low-latency audio streaming, an STT → LLM → TTS loop, and audio back to the caller — all while keeping Azure OpenAI and Key The Unix timestamp (in seconds) of when the model response was completed. Meanwhile, Jony Ive’s ‘io’ team at OpenAI has made a notable Apple veteran At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Aug 31, 2025 · Realtime: sample WebSocket and WebRTC servers; TURN/STUN guidance; bandwidth and NAT considerations. Aug 29, 2025 · 【新智元导读】OpenAI凌晨发布最新生产级别语音模型和API。Realtime API实现语音直接处理，支持图像输入、远程MCP服务器与SIP打电话，极大简化语音智能体构建；而新一代语音到语音模型gpt-realtime，在音质、理解力、指令遵循和 Sep 23, 2025 · GPT Realtime Is Now Generally Available: gpt-realtime, SIP Calling, MCP Tools, Image Input, and 20% Lower Prices OpenAI just made their Realtime API generally available with a brand new speech model called GPT Real-time. This step-by-step guide covers webhook setup, SIP testing, Twilio Elastic SIP Trunking, and end-to-end call flow, enabling real-time speech-to-speech AI conversations with low latency and natural interactions. 20）当前的这个方案，应该是市面上唯一的一个支持SIP接入的demo了。 Build and deploy a simple voice assistant in less than 10 minutes. You can use the Realtime API via WebRTC, SIP, or WebSocket to send audio input to the model and receive audio responses in real time. Establishing a connection for realtime data transfer Creating a realtime session with the Realtime API Using an OpenAI model with realtime audio input and output capabilities If you are new to building voice agents, we recommend using the Realtime Agents in the TypeScript Agents SDK to get started with your voice agents. RealTime 实时语音对话服务 Realtime 使得可以像活生生的朋友一样跟chatgpt通话 Realtime 对应模型 gpt-4o-realtime-preview 如何使用访问 https://realtime. Aug 28, 2025 · OpenAI says the model is better at picking the right tool, triggering it at the right moment, and using the right arguments, making function calls more dependable. [8][9][10] Its release of ChatGPT in November 2022 has been credited with catalyzing widespread interest 12 hours ago · OpenAI CFO Sarah Friar said the company is focused on "practical adoption" in 2026, especially in health, science, and enterprise. Building safe and beneficial AGI is our mission. Oct 24, 2025 · The OpenAI Realtime API can sit between your SIP gateway and your app to inject AI intelligence into phone calls. Aug 29, 2025 · OpenAI Realtime API is now generally available, introducing gpt-realtime for advanced speech, image input, SIP calling, voice commands, and new synthetic voices for developers Learn how to use the GPT Realtime API for speech and audio with Azure OpenAI. 00/1M output tokens 有关详细信息，请参阅使用 Azure OpenAI 创建资源和部署模型。在受支持的区域内部署 gpt-4o-realtime-preview 、 gpt-4o-mini-realtime-preview 、 gpt-realtime 、 gpt-realtime-mini 或 gpt-realtime-mini-2025-12-15 模型，如本文中“支持的模型”部分所述。. We break down its features, pricing, and practical use cases for voice agents in customer support. Sep 11, 2025 · OpenAI launched gpt-realtime and the Realtime API, enabling production-ready AI voice agents with end-to-end speech processing, lower latency, and natural speech delivery. openai. Build smarter calls, assistants, and live interactions. OpenAI’s new gpt realtime takes a different path. ElevenLabs already ships full conversational agents. We explore the massive upgrades from the preview model, including visual capabilities, new connectivity for phone systems, and significantly improved cost-efficiency. Aug 29, 2025 · OpenAI has added remote model context protocol (MCP) Server and session initiation protocol (SIP) support to its speech-to-text large language model gpt-realtime via its dedicated API to help enterprises build more autonomous voice-based agents. Oct 1, 2024 · Availability & pricing The Realtime API will begin rolling out today in public beta to all paid developers. Learn how to use the OpenAI API to generate human-like responses to natural language prompts, analyze images with computer vision, use powerful built-in tools, and more. This (WIP) project integrates the API into a Unity application, allowing users to build low-latency, multi-modal conversational apps that support both text and audio input/output, as well as function calling (via OpenAI Realtime API documentation Aug 29, 2025 · OpenAI has added remote model context protocol (MCP) Server and session initiation protocol (SIP) support to its speech-to-text large language model gpt-realtime via its dedicated API to help The OpenAI Realtime API supports connecting to realtime models through a WebRTC peer connection. - openai/openai-realtime-agents The format of input audio. OpenAI is widely recognized for its development of the GPT family of large language models, the DALL-E series of text-to-image models, and a text-to-video model named Sora, which have influenced industry research and commercial applications. Now the only issue is that the AI doesn’t know WHAT I’m saying. This setup has been w REST endpoints for controlling WebRTC or SIP calls with the Realtime API. Learn how to use GPT Realtime API for speech and audio with Azure OpenAI. Aug 28, 2025 · Today we’re making the Realtime API generally available with new features that enable developers and enterprises to build reliable, production-ready voice agents. To use it, pass the model instance to the runner and supply the SIP call_id when starting the session. That means faster responses, more natural interactions, and a stronger foundation to scale real-time AI to many more people,” said Sachin Katti of OpenAI. The SDK provides OpenAIRealtimeSIPModel, which reuses the same agent flow while negotiating media over SIP. Azure OpenAI notifies customers of active Azure OpenAI deployments for models with upcoming retirements. This integration allows you to leverage OpenAI's advanced AI capabilities in your call flows. I got everything to work in Java locally, while using my microphone and my audio. This ensures the SIP invitation and Realtime session share identical defaults. Everything went great so far, I can hear the AI, it picks up that I’m talking. Follow the instructions in this article to get started with the Realtime API via SIP. The call connects successfully, but I don’t get any audio back from OpenAI. com (第三方) 看下面的在线测试计费规则 # 语音提问（相当于 gpt-4-turbo 的10倍） 100. I’m talking about the AI Voice Connector from OpenSIPS – the team has given the community a working bridge between VOIP and OpenAI Realtime API. ddaiai. Learn more about the Realtime API. Here's why you should care: you can now build voice apps that sound completely human without being a coding wizard. Natively supports speech-to-speech as well as text, image, and audio inputs and outputs. You Oct 1, 2024 · Welcome to the Public Preview for Azure OpenAI /realtime using gpt-4o-realtime-preview! This repository provides documentation, standalone libraries, and sample code for using /realtime -- applicable to both Azure OpenAI and standard OpenAI v1 endpoint use. The support for remote MCP Servers in the Realtime API — now generally available — is designed to let developers program Sep 2, 2025 · Hi everyone, I am trying to integrate GPT Realtime with FreeSWITCH using TLS SIP. Apr 26, 2025 · I had been working in a ARI app for pure Asterisk 20 that connects calls from extensions and Sip Trunks to OpenAI RealTime models, that reduce substancially the latency (to 1 sec aprox. The OpenAI Realtime API is GA and with it we introduced a lot of new features and a new gpt-realtime model and lots of new features including: 📝 Better instruction following — The model will Sep 8, 2025 · Learn to connect the OpenAI Realtime SIP Connector with Twilio’s Programmable SIP to talk with an AI Agent and escalate to a human. Does anyone have a working example or guide that covers the full flow? Specifically: Asterisk configuration Python implementation Step-by-step guide / best practices May 30, 2025 · Hello everyone, Are there any VOIP enthusiasts or experts here? If so, we might have something to discuss. Accept or reject an incoming call, transfer it to another destination, or hang up the call once you are finished. js (Express on EC2), SIP trunk (Twilio Programmable Voice), OpenAI Realtime via SIP Goal: Transfer an active call mid-session using… Sep 21, 2025 · Hi all, I’m testing an integration between Asterisk and OpenAI Realtime SIP API. The setup has been working well so far, but from mid-December, some calls started to f… 1 day ago · We’ve built a voice application using OpenAI gpt-realtime, where incoming calls are connected to the model via Twilio SIP Trunking (Twilio phone number → OpenAI SIP endpoint). Oct 24, 2025 · Integrate real-time voice AI in your app with OpenAI Realtime API, WebRTC, SIP, and WebSockets. Aug 29, 2025 · OpenAI Realtime API is now generally available, introducing gpt-realtime for advanced speech, image input, SIP calling, voice commands, and new synthetic voices for developers 第一步完成了 SIP stack 可以工作之后，就开始测试这次最重要的一个功能： OpenAI + SIP 市面上主流的AI呼叫中心，都是基于FreeSwitch + ASR + LLM, 还没看到有FreeSwitch + Openai realtime的解决方案（2025. Usually, it just responds in a different See how to integrate Twilio APIs with the OpenAI Realtime API with these integrations and starter apps built in collaboration with OpenAI. On these occasions, the phone doesn’t Sep 7, 2025 · API realtime 2 235 October 15, 2025 Not able to connect to realtime server side websocket using call_id API 4 620 November 19, 2025 Certain session properties result in the call turning to static with gpt-realtime and SIP Bugs api , realtime , api-realtime , api-realtime-speech , gpt-realtime 14 625 September 8, 2025 Sep 1, 2025 · Realtime SIP /refer always 400 (empty body) — /accept works Stack & Goal Env: Node. Try popular services with a free Azure account, and pay as you go with no upfront costs. Create a . On Friday, Musk filed a 18 hours ago · 2026 may turn out to be the year of OpenAI’s first hardware product, according to the company’s policy chief. As the company spends a huge amount of money on infrastructure, OpenAI is working on 17 hours ago · OpenAI Chief Financial Officer Sarah Friar said in a blog post on Sunday the company's annualized revenue has surpassed $20 billion in 2025, up from $6 billion in 2024 with growth closely tracking Cast your votes and witness the simulated consequences of your decisions as we reimagine AI governance and democratize the trajectory of technological evolution. 00/1M inputtokens回答 200. Learn how to manage Realtime speech-to-speech conversations. Oct 10, 2024 · I’m currently working on using the api in Java to implement it with a SIP (JVoIP). The call connects successfully, but I cannot hear any audio from GPT. The OpenAI Realtime API enables low-latency communication with models that natively support speech-to-speech interactions as well as multimodal inputs (audio, images, and text) and outputs (audio and text). ) between send and receive answers making felling the conversation more fluid and natural. 1 day ago · Elon Musk is going for some substantial damages in his lawsuit accusing OpenAI of abandoning its nonprofit mission and “making a fool out of him” as an early investor. 3 days ago · We’ve developed a voice application powered by gpt-realtime. For browser-based speech-to-speech voice applications, we recommend starting with the Agents SDK for TypeScript, which provides higher-level helpers and APIs for managing Realtime sessions. Developers can connect external tools and services through SIP and remote MCP servers. env file from the example file and set your API key in there: This application shows how to send and receive Realtime API events over the WebRTC data channel and configure client-side function calling. SIP integration You can attach realtime agents to phone calls that arrive via the Realtime Calls API. Testing: unit, integration, and E2E tests; mocked OpenAI calls; load and latency tests for realtime. Create a new Realtime API call over WebRTC and receive the SDP answer needed to complete the peer connection. Sep 15, 2025 · Learn how to integrate the OpenAI Realtime API with SIP and Twilio to build live voice AI agents. New features include SIP OpenAI Realtime SIP Integration This guide will walk you through integrating Bandwidth's Voice Network with OpenAI's Realtime SIP Interface. You get ASR, an LLM, TTS, tools, knowledge bases, webhooks, and SIP calling. We connect callers with the model via SIP Trunking with a twilio number. 5 days ago · OpenAI will purchase up to 750 megawatts of computing power over three years from chipmaker Cerebras as the ChatGPT maker looks to pull ahead in the AI race and meet the growing demand, the two 有关详细信息，请参阅使用 Azure OpenAI 创建资源和部署模型。在受支持的区域内部署 gpt-4o-realtime-preview 、 gpt-4o-mini-realtime-preview 、 gpt-realtime 、 gpt-realtime-mini 或 gpt-realtime-mini-2025-12-15 模型，如本文中“支持的模型”部分所述。 We believe our research will eventually lead to artificial general intelligence, a system that can solve human-level problems. Unlike other Vapi configurations which orchestrate a transcriber, model and voice API to simulate speech-to-speech, OpenAI’s Realtime API natively processes audio in and audio out. Aug 29, 2025 · For developers, “gpt-realtime” is the flagship: OpenAI has launched general availability of the Realtime API. Learn how to use webhooks and server-side controls with the Realtime API. com/v1/realtime/calls/ {call_id}/hangup End an active Realtime API call, whether it was initiated over SIP or WebRTC. Audio in the Chat Completions API will be released in the coming weeks, as a new model gpt-4o-audio-preview. Audio capabilities in the Realtime API are powered by the new GPT‑4o model gpt-4o-realtime-preview. Aug 29, 2025 · OpenAI is late to voice agents… but here’s the plot twist. Additionally, the call hangs up automatically after about 2 seconds. Then I wanted to implement the SIP. I have verified the SIP connection and TLS configuration, but the issue persists. For preview models, it's 90-120 days from launch. Here’s the flow: Asterisk sends INVITE to OpenAI. 1 day ago · In this video, we dive deep into OpenAI’s newly released GPT Realtime API, which is now production-ready (General Availability). Azure OpenAI Service pricing information. Sep 15, 2025 · By combining OpenAI Realtime with SIP, you can let callers dial a regular phone number and talk to an AI agent in real time, with no extra translation layers in between. It’s ideal for call centers or IVR systems where AI can answer routine questions, escalate calls, or even translate conversations in real time. Attach a RealtimeSession that uses the OpenAIRealtimeSIP transport and connect with the callId issued by the provider webhook. OpenA… Nov 14, 2025 · A complete overview of OpenAI's GPT realtime mini. Aug 29, 2025 · OpenAI's GPT-Realtime API is here! Build production-grade voice agents with natural speech, image input, SIP calling, and more. Security: input validation (schema), output filtering, rate limits, audit logging, key rotation patterns. Reusable prompts allow for saving configurations and tool settings for different use cases. [!INCLUDE classic-banner] Azure OpenAI GPT Realtime API for speech and audio is part of the GPT-4o model family that supports low-latency, "speech in, speech out" conversational interactions. For pcm16, input audio must be 16-bit PCM at a 24kHz sample rate, single channel (mono), and little-endian byte order. js/TypeScript server to respond to webhooks, and build an AI support agent that answers inbound calls, understands customer issues, and responds instantly. As a result, real-time mode fails because the SDK always attempts to authenticate against OpenAI’s public API instead of using the Azure client credentials. Has anyone experienced this before or know how to resolve it? Any guidance would be greatly This article features detailed descriptions and best practices on the quotas and limits for Azure OpenAI. One model. Audio in and audio out with built in reasoning. It handles voice input/output via WebRTC/WS, supports barge-in interruptions, SIP telephony, MCP tool integration, and image input —making production-grade voice agents realistic. Nov 14, 2025 · I’ve built a AI voice assistant using the Realtime API and connected it with a caller using an SIP connection with Twilio. post https://api. Aug 27, 2025 · When using the OpenAI Agents SDK in Python with Azure OpenAI as the default model (via the async Azure client), the SDK ignores the Azure configuration and still requires OPENAI_API_KEY. The call is initiated when the caller dials my Twilio number, and Twilio creates an SIP connection with OpenAI. In this guide, I’ll walk through connecting Twilio’s Elastic SIP Trunking to OpenAI’s Realtime API using a Node. 01. But very frequently (at least 10% of the time) the call doesn’t connect. Server events | OpenAI API Reference 4 days ago · Breaking News OpenAI has made itslargest investment in the $250 million seed round ofMerge Labs, a brain–computer interface startup co-founded by Sam Altman and valued at $850 million. 4 days ago · OpenAI partners with Cerebras to add 750 MW of low-latency AI compute, aiming to speed up real-time inference and scale faster, more responsive AI workloads through 2028. Follow the instructions in this article to get started with the Realtime API via WebRTC. com/v1/realtime/calls/ {call_id}/reject Hang up call post https://api. With SIP and the Realtime API you can direct incoming phone calls to the API. Speech to speech. Options are pcm16, g711_ulaw, or g711_alaw. Learn to connect the OpenAI Realtime SIP Connector with Twilio’s Elastic SIP Trunking to talk with an AI Agent. 17 hours ago · OpenAI Chief Financial Officer Sarah Friar said in a blog post on Sunday the company's annualized revenue has surpassed $20 billion in 2025, up from $6 billion in 2024 with growth closely tracking Sep 15, 2025 · Learn how to integrate the OpenAI Realtime API with SIP and Twilio to build live voice AI agents. Through significant performance improvements, price optimization, and feature expansion, it provides a powerful solution for enterprise-grade voice applications. Create a custom voice you can use for audio output (for example, in Text-to-Speech and the Realtime API).

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Openai Realtime Sip. Aug 28, 2025 · The official release of OpenAI's GPT-realti