OpenAI Debuts GPT-5 Pro, Sora 2, and New Voice Model at Dev Day

OpenAI used its Dev Day to unveil a slate of updates aimed at deepening developer adoption, including the release of GPT-5 Pro, the next-generation language model designed for industries such as finance, healthcare, and law that demand advanced reasoning and precision. CEO Sam Altman emphasized that the model sets a new bar for accuracy while positioning voice as a key frontier for human–AI interaction. To that end, the company introduced gpt-realtime mini, a smaller, low-latency voice model that is 70% cheaper than its predecessor but maintains full expressiveness.

Developers also gained access to Sora 2 through the API, a powerful new video and audio generator that produces more realistic visuals, synchronized sound, and detailed creative controls. Presented as both a creative tool and a production pipeline, Sora 2 builds on OpenAI’s push to expand generative AI into consumer and enterprise applications, from marketing content to toy design through its deal with Mattel. The announcements reinforced OpenAI’s strategy to make its ecosystem the core platform for developers building the next wave of AI applications.