GPT-4o

GPT-4o is an end-to-end multimodal large language model released by OpenAI in May 2024, with the "o" standing for "omni" . Per Yunqi Capital's analysis published on the day of its release, its most striking capabilities were ultra-fast and low-cost operation, emotionally expressive real-time voice interaction, and real-time video interaction — all enabled by an algorithmic unification at the model level that merged previously separate steps like ASR and TTS into a single pipeline . However, Yunqi also noted that beyond these multimodal advances, the model's update delivered limited improvement in core capabilities, characterizing it more as application-oriented innovation under existing technical combinations rather than a leap in underlying intelligence . In benchmark terms, a later human-preference evaluation found GPT-4o retained an edge over the subsequent o1-preview in natural language processing and everyday text-generation tasks, while lagging in domains requiring deep reasoning such as coding, mathematics, and data analysis .