May 2024
GPT-4o — Omni Model With Real-Time Audio and Vision
OpenAI launched GPT-4o ('omni'), a unified model that natively processes text, audio, and images in a single neural network rather than through a pipeline of separate specialist models. GPT-4o could respond to audio in as little as 232 milliseconds — matching human conversational latency — and detect emotional tone in speech. The model was made available to all free ChatGPT users, removing the paid-only barrier for GPT-4-class capabilities for the first time.
Why it mattersNative real-time audio-visual processing in a single model made low-latency voice assistants buildable without cobbling together separate STT, LLM, and TTS services.
Try itBuild a prototype voice assistant using the GPT-4o Realtime API to measure end-to-end latency against your current STT+LLM+TTS stack before committing to either architecture.