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About

GPT-Realtime-2.1 is OpenAI’s reasoning model with tool use for low-latency voice agents and complex speech-to-speech workflows. It updates GPT-Realtime-2 with improved alphanumeric recognition, silence and noise handling, and interruption behavior, helping applications understand spoken code, manage imperfect audio, and respond more naturally when users pause or talk over the agent. Developers can configure reasoning effort to balance deeper thinking against latency and output usage, while strong instruction following helps the model stay aligned with a defined role, tone, and workflow. It accepts and produces both audio and text, can take images as input, and supports function calling so an agent can retrieve information or perform actions during a conversation. The model has a 128,000-token context window, supports up to 32,000 output tokens, and includes reasoning-token support for extended interactions.

About

​The Gemini Live API is a preview feature that enables low-latency, bidirectional voice and video interactions with Gemini. It allows end users to experience natural, human-like voice conversations and provides the ability to interrupt the model's responses using voice commands. The model can process text, audio, and video input, and it can provide text and audio output. New capabilities include two new voices and 30 new languages with configurable output language, configurable image resolutions (66/256 tokens), configurable turn coverage (send all inputs all the time or only when the user is speaking), configurable interruption settings, configurable voice activity detection, new client events for end-of-turn signaling, token counts, a client event for signaling the end of stream, text streaming, configurable session resumption with session data stored on the server for 24 hours, and longer session support with a sliding context window.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Developers, AI agent builders, voice AI teams, contact center platforms, customer support teams, product teams, enterprise automation teams, and conversational AI companies that need realtime speech-to-speech interactions, audio input and output, function calling, tool use, configurable reasoning, image input, long-context voice workflows, transcription, translation, and interactive AI assistants

Audience

Researchers looking for a solution to build real-time, multimodal AI applications that require low-latency voice and video interactions

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

$0.40 per cached input
Free Version
Free Trial

Pricing

No information available.
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

OpenAI
Founded: 2015
United States
developers.openai.com/api/docs/models/gpt-realtime-2.1

Company Information

Google
Founded: 1998
United States
ai.google.dev/gemini-api/docs/live

Alternatives

Alternatives

GPT-4o mini

GPT-4o mini

OpenAI

Categories

Categories

Integrations

Agora
Fishjam
Gemini
Gemini 3.1 Flash Image
Gemini 3.1 Flash Live
Gemini 3.1 Flash TTS
Gemini 3.5 Live Translate
Gemini Enterprise
Gemini Enterprise Agent Platform
LiveKit
Nano Banana
Nano Banana 2
Nano Banana 2 Lite
Nano Banana Pro
OpenAI
Veo 3.1
Veo 3.1 Fast
Vision Agents
gpt-realtime
voximplant

Integrations

Agora
Fishjam
Gemini
Gemini 3.1 Flash Image
Gemini 3.1 Flash Live
Gemini 3.1 Flash TTS
Gemini 3.5 Live Translate
Gemini Enterprise
Gemini Enterprise Agent Platform
LiveKit
Nano Banana
Nano Banana 2
Nano Banana 2 Lite
Nano Banana Pro
OpenAI
Veo 3.1
Veo 3.1 Fast
Vision Agents
gpt-realtime
voximplant
Claim GPT-Realtime-2.1 and update features and information
Claim GPT-Realtime-2.1 and update features and information
Claim Gemini Live API and update features and information
Claim Gemini Live API and update features and information