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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 Contextwaise?

Contextwaise is a cutting-edge API and agent SDK tailored for teams focused on building retrieval-augmented generation (RAG) applications, AI agents, and various large language model (LLM) products. It assesses retrieved materials, including passages, web pages, chat logs, and tool outputs, in line with the specific requirements of the task at hand, delivering pertinent context while respecting a designated token limit prior to the model's engagement. Equipped with a flexible REST API, it supports requests in any programming language, while its TypeScript and Python SDKs enhance agent workflows and integrate effortlessly with Vercel AI SDK, Anthropic SDK, and OpenAI SDK. The output systematically preserves the sequence of submissions, generating reports that outline token modifications, potential cost savings, and rationales for excluded content. Contextwaise also includes features such as request logging, adjustable budgets, and quality assurance; its agent SDKs can disclose segments of excluded tool outputs for additional clarification. By employing this solution, engineering teams can significantly reduce unnecessary model inputs while maintaining their retrieval resources, prompts, and interactions with model providers, thus simplifying the development workflow. This optimization not only improves efficiency but also empowers teams to advance their AI-driven applications more effectively and creatively. Ultimately, Contextwaise serves as an essential tool for fostering innovation in the AI landscape.

Media

Media

No images available

Integrations Supported

OpenAI
gpt-realtime

Integrations Supported

OpenAI
Anthropic
Vercel AI SDK

API Availability

Has API

API Availability

Has API

Pricing Information

$0.40 per cached input
Free Trial Offered?

Pricing Information

$15/month
Free includes 1M context tokens once. Pro is $15/month for 100M tokens/month, then $0.18 per started 1M tokens. Scale is $49/month for 350M tokens/month, then $0.15 per started 1M tokens. Enterprise has custom pricing under an annual contract and offers self-hosted deployment.
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS
On-Prem

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

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

GITMORE

Date Founded

2026

Company Location

United Kingdom

Company Website

contextwaise.com

Categories and Features

AI Models

Not specified

Categories and Features

LLM API

Not specified

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