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Description

GPT-Realtime-2.1 is an OpenAI realtime model designed for advanced voice-agent and speech-to-speech AI applications. It improves on GPT-Realtime-2 with stronger alphanumeric recognition, better silence and noise handling, and more natural interruption behavior. The model supports text, audio, and image inputs, while producing text and audio outputs for interactive realtime experiences. Developers can use GPT-Realtime-2.1 across endpoints such as Chat Completions, Responses, Realtime, realtime translation, realtime transcription sessions, and related OpenAI API workflows. The model supports function calling, configurable reasoning effort, instruction following, and reasoning token support for complex voice-agent tasks. Its 128,000-token context window and 32,000-token maximum output make it suitable for longer conversations and more detailed realtime workflows. GPT-Realtime-2.1 does not support video, structured outputs, fine-tuning, or predicted outputs according to OpenAI’s current documentation. Pricing starts at $4 per 1 million text input tokens and $24 per 1 million text output tokens, with separate pricing for audio and image tokens. By combining realtime audio interaction, reasoning, tool use, and multimodal input, GPT-Realtime-2.1 helps developers build responsive AI agents for support, sales, operations, translation, transcription, and interactive voice applications.

Description

Grok Speech to Text is an independent audio API created to assist developers in seamlessly incorporating quick and precise transcription capabilities into various applications. Utilizing the same technology framework that drives Grok Voice, Tesla vehicles, and Starlink's customer support services, this API caters to multiple applications such as voice assistants, real-time transcription solutions, accessibility enhancements, podcasts, meeting documentation, telephony, and engaging audio experiences. Grok STT is capable of producing transcripts from extensive audio files via a REST API or transcribing speech instantly using a low-latency WebSocket API. It features word-level timestamps, speaker differentiation, support for multiple audio channels, and advanced Inverse Text Normalization, which transforms spoken language into correctly formatted structured outputs for different data types, including numbers, dates, and currencies. Grok Speech to Text has been rigorously tested across various formats, including phone calls, meetings, videos, and podcasts, demonstrating exceptional accuracy in entity recognition and various business applications. This API provides a versatile solution for developers looking to enhance their application's audio capabilities with reliable transcription features.

API Access

Has API

API Access

Has API

Screenshots View All

Screenshots View All

Integrations

Grok
OpenAI
gpt-realtime

Integrations

Grok
OpenAI
gpt-realtime

Pricing Details

$0.40 per cached input
Free Trial
Free Version

Pricing Details

No price information available.
Free Trial
Free Version

Deployment

Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook

Deployment

Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook

Customer Support

Business Hours
Live Rep (24/7)
Online Support

Customer Support

Business Hours
Live Rep (24/7)
Online Support

Types of Training

Training Docs
Webinars
Live Training (Online)
In Person

Types of Training

Training Docs
Webinars
Live Training (Online)
In Person

Vendor Details

Company Name

OpenAI

Founded

2015

Country

United States

Website

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

Vendor Details

Company Name

SpaceXAI

Founded

2023

Country

United States

Website

x.ai/news/grok-stt-and-tts-apis

Product Features

Product Features

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