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Learn about OpenAI's GPT Realtime API general availability release and its five major new features for building advanced voice agents in this 24-minute tutorial. Discover the latest upgrades including Model Context Protocol (MCP) support, image input capabilities, SIP phone calling integration, new expressive voices, and 20% reduced pricing. Explore practical demonstrations of implementing the Realtime API across different platforms, from WebRTC browser and mobile applications to production-ready AI calling systems using Twilio and Retell AI integrations.
