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What is Gemini 3.8 Live?

Gemini 3.8 Live is Google DeepMind’s real-time multimodal voice model for developers building conversational agents that can listen, speak, reason, use tools, and complete tasks during live interactions. Unlike traditional voice systems that combine separate speech recognition, language, and text-to-speech components, Gemini 3.8 Live provides a native speech-to-speech architecture intended to create more fluid conversational experiences. The model can continue streaming an audio response while asynchronous function calls execute in the background, reducing pauses when an agent needs information from external services. This makes it suitable for applications such as customer service, scheduling, transactions, enterprise assistants, interactive training, and other workflows that require both conversation and action. Gemini 3.8 Live can consume visual context alongside audio, allowing developers to create agents that respond to what a user is saying as well as what a camera or visual input is showing. Incremental content updates let applications combine real-time dialogue with structured information and update responses as new data arrives. The model supports more than 97 languages and is designed to provide consistent accents across multilingual conversations. It also improves recognition of alphanumeric information such as confirmation codes, policy numbers, claim identifiers, technical values, and other data where transcription precision is important. For more demanding workflows, Gemini 3.8 Live Extended Thinking provides configurable reasoning that can work through complex multi-step problems in the background while the main conversation continues. Developers can access Gemini 3.8 Live through the Gemini Live API and Google AI Studio, with ecosystem integrations available through platforms including LiveKit, Pipecat, Agora, Fishjam, LangChain, Vercel, and Vision Agents.

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.

Media

Media

Integrations Supported

Agora
Fishjam
Gemini
Gemini 3.8 Flash
Gemini Enterprise
Gemini Enterprise Agent Platform
Gemini Live API
Google AI Studio
Google Stitch
LangChain
LiveKit
OpenAI
Pipecat
Vercel
Vision Agents
gpt-realtime

Integrations Supported

Agora
Fishjam
Gemini
Gemini 3.8 Flash
Gemini Enterprise
Gemini Enterprise Agent Platform
Gemini Live API
Google AI Studio
Google Stitch
LangChain
LiveKit
OpenAI
Pipecat
Vercel
Vision Agents
gpt-realtime

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided
Free Version
Free Trial Offered?

Pricing Information

$0.40 per cached input
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

Google

Date Founded

1998

Company Location

United States

Company Website

gemini.google.com

Company Facts

Organization Name

OpenAI

Date Founded

2015

Company Location

United States

Company Website

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

Categories and Features

Categories and Features

Popular Alternatives

Popular Alternatives

GPT-Live-1 Reviews & Ratings

GPT-Live-1

OpenAI