GPT-4o

GPT-4o is OpenAI's flagship omni-modal model, with the "o" standing for "omni" to reflect its unified handling of text, audio, image, and video within a single system rather than routing through separate models for each modality. Positioned as the successor to GPT-4 Turbo, it was introduced on May 13, 2024 and is designed to make human-computer interaction feel more natural by responding to audio inputs in as little as 232 milliseconds, averaging 320 milliseconds—comparable to human conversational timing. By collapsing what was previously a pipeline of Whisper transcription, GPT-4 Turbo reasoning, and a text-to-speech layer into one model, GPT-4o aims to simplify multimodal workflows and unlock new kinds of voice and vision experiences.

In practical terms, GPT-4o is targeted at developers and product teams who want a single model for mixed-media applications such as real-time voice assistants, interview preparation, image-grounded Q&A, and code or text tasks that may be interspersed with visual references. OpenAI describes it as matching GPT-4 Turbo on English text and code while delivering significant gains on non-English languages, and as especially stronger on vision and audio understanding compared with prior models. It is also positioned as faster and roughly 50% cheaper in the API than GPT-4 Turbo, making it a natural fit for high-volume conversational and multimodal deployments where latency, language coverage, and cost together shape the user experience.