OpenAI’s Developer Day 2025 has officially wrapped up — and it might be the company’s biggest event since GPT-4.
Sam Altman opened the keynote with stunning stats: 4 million developers, 800 million weekly ChatGPT users, and over 6 billion tokens processed per minute through OpenAI APIs.
OpenAI has surprised the AI community with a late-night announcement: for the first time since GPT-2, it is open-sourcing large language models again. This time, we get two reasoning models – GPT-OSS-20B and GPT-OSS-120B, capable of delivering performance close to o4-mini while running locally on high-end laptops or even smartphones. The global developer community is buzzing with excitement.
