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What is GPT-Realtime-2.1?

GPT-Realtime-2.1 is an OpenAI realtime reasoning model for developers building voice agents, conversational AI assistants, and speech-to-speech applications. The model is designed to support fast interactive experiences where users can speak naturally and receive audio or text responses. GPT-Realtime-2.1 updates GPT-Realtime-2 with improved handling of alphanumeric recognition, silence, background noise, and interruptions. It supports text, audio, and image input, with text and audio output, while video is not supported. The model includes configurable reasoning effort so developers can balance reasoning depth, latency, and token usage for different voice-agent workflows. GPT-Realtime-2.1 also supports instruction following, function calling, tool use, and reasoning tokens for more complex applications. Its 128,000-token context window and 32,000-token maximum output allow it to manage longer conversations and richer task context. OpenAI lists support across endpoints such as Chat Completions, Responses, Realtime, realtime translations, realtime transcription sessions, Assistants, Batch, and related API services. The model’s documented pricing includes $4 per 1 million text input tokens, $0.40 per 1 million cached text input tokens, and $24 per 1 million text output tokens, with separate audio and image token pricing. GPT-Realtime-2.1 is not documented as supporting streaming, structured outputs, fine-tuning, or predicted outputs. By combining realtime speech, multimodal input, reasoning, function calling, and tool use, GPT-Realtime-2.1 gives developers a foundation for building sophisticated AI voice agents and interactive customer-facing applications.

What is Boson AI?

Boson AI offers advanced voice agents that leverage foundational audio models specifically designed for seamless integration into business operations, evolving with each interaction they have. Meanwhile, Higgs Realtime enables the deployment of live voice agents for a variety of uses, such as customer support, sales dialogues, and product assistance, ensuring they can listen and reply with minimal delay and a natural conversational flow. To further elevate these capabilities, Higgs Audio and Avatar provide features like text-to-speech, speech recognition, voice cloning, sentiment analysis, and avatar generation, all of which help generate human-like speech while discerning tone, emotion, and intent. Additionally, these sophisticated models deliver precise multilingual speech recognition, real-time translation, and adaptable voice generation, with insights from sentiment analysis enhancing routing, analytics, and agent adaptability. With a strong emphasis on effective implementation, the platform is designed for high quality, low latency, and reliability, offering flexible solutions suitable for both managed services and self-service setups. This robust architecture empowers businesses to harness voice technology not only to enhance customer interactions but also to optimize operational workflows and efficiency. Ultimately, by integrating such cutting-edge technology, organizations can achieve significant improvements in their overall service and communication strategies.

Media

Media

Integrations Supported

Higgs Audio / Avatar
Higgs Realtime
OpenAI
gpt-realtime

Integrations Supported

Higgs Audio / Avatar
Higgs Realtime
OpenAI
gpt-realtime

API Availability

Has API

API Availability

Has API

Pricing Information

$0.40 per cached input
Free Version
Free Trial Offered?

Pricing Information

Pricing not provided
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

OpenAI

Date Founded

2015

Company Location

United States

Company Website

developers.openai.com/api/docs/models/gpt-realtime-2.1

Company Facts

Organization Name

Boson AI

Date Founded

2023

Company Location

United States

Company Website

www.boson.ai/

Categories and Features

Categories and Features

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