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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 Canonical AI?

Analyze communication trends and classify results, vital performance metrics, and additional factors. Map out both common and uncommon discussion routes while pinpointing calls that meet specific standards. You can also integrate tailored metrics to track what is most crucial for optimizing the performance of your voice AI system. A key factor to consider in voice AI is the Signal-to-Noise Ratio (SNR), which assesses the quality of the desired audio signal in relation to background noise. A higher SNR indicates clearer audio, while a lower SNR suggests increased interference. Improved SNR, combined with superior audio fidelity, can greatly enhance the precision of automatic speech recognition and natural language processing capabilities. When audio clarity is optimized, your Voice AI system becomes more adept at interpreting user input, thus boosting the chance of successful interactions. Monitoring SNR is essential for making immediate adjustments in audio processing, ensuring optimal performance at all times. In addition, Voice AI Latency, the delay between user input and the AI's response, is crucial for maintaining effective dialogue. Rapid and responsive communication is vital for fostering successful interactions and improving the overall user experience, making it a key area to focus on for further advancements. By prioritizing these aspects, you can significantly refine the efficiency of your voice AI systems.

Media

Media

Integrations Supported

OpenAI
gpt-realtime

Integrations Supported

API Availability

Has API

API Availability

Pricing Information

$0.40 per cached input
Free Trial Offered?

Pricing Information

$0.025 per month
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub
Online 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

Canonical AI

Company Location

United States

Company Website

voice.canonical.chat/

Categories and Features

AI Models

Not specified

Categories and Features

AI Tools

Not specified

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