GPT-5.5 Unveiled: A New Standard in Coding, Science and Security

OpenAI has announced GPT-5.5, its smartest and most intuitive model to date. Introduced as β€œa new class of intelligence,” it is poised to fundamentally change how we get work done on a computer. πŸš€ Introducing GPT-5.5 A new class of intelligence for real work and powering agents, built to understand complex goals, use tools, check its work, and carry more tasks through to completion. It marks a new way of getting computer work done. Now available in ChatGPT and Codex. pic.twitter.com/rPLTk99ZH5 ...

April 23, 2026 ·  14 min ·  2884 words

What is GPT-5.3-Codex? OpenAI's Most Powerful Coding Agent

Hello everyone! 😁 OpenAI announced a brand new model called GPT-5.3-Codex on February 5, 2026, and believe me, this model is truly a game-changer! πŸš€ What is GPT-5.3-Codex? GPT-5.3-Codex is the most capable agentic coding model that OpenAI has developed to date. We previously wrote about the OpenAI Codex App, and now we have the most powerful model behind this platform! So what does β€œagentic” mean? The model doesn’t just write code for you; it can also take on long-running tasks like a colleague, conduct research, use tools, and execute complex operations. ...

February 5, 2026 ·  5 min ·  869 words