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GPT Realtime is OpenAI's flagship model designed for real-time voice conversations, supporting both text and audio input/output with a 128K token context window.
Prices updated daily. Last check: Sep 6, 2026
GPT Realtime is designed for applications requiring immediate voice interaction capabilities, making it well-suited for voice assistants, real-time customer service systems, and interactive voice response applications. Its tool calling functionality enables voice-activated workflows that can integrate with external APIs and databases during conversations. The model excels in scenarios where conversation flow and response timing are critical, such as phone-based support systems, voice-controlled smart home devices, and real-time language practice applications. Its flagship-tier reasoning capabilities make it appropriate for complex voice-based queries that require multi-step thinking, while the 128K context window allows for extended conversations with maintained context.
GPT Realtime pricing varies by provider and usage type (audio vs text tokens may be priced differently). Check the pricing table above for current rates across all providers offering GPT Realtime access.
GPT Realtime is optimized for real-time voice conversations and applications requiring immediate audio response. It excels in voice assistants, customer service systems, phone-based support, and any scenario where natural conversation flow and low latency are important.
GPT Realtime processes audio natively without requiring separate text-to-speech conversion, resulting in lower latency and more natural conversation flow. It's specifically optimized for real-time voice interactions rather than text generation that gets converted to speech afterward.