OpenAI DevDay 2025: GPT-5 Pro API, Sora 2 Launch, and 800M Users
OpenAI unveils GPT-5 Pro API, Sora 2 for developers, AgentKit, AMD partnership, and reaches 800 million weekly active ChatGPT users at DevDay 2025.
October 6, 2025 10 min read openai devday gpt-5 sora-2 
