
What is GPT-5.3-Codex? OpenAI's Most Powerful Coding Agent
Hello everyone! π 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! π 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 βagenticβ mean? The model doesnβt just write code for you; it can also take on long-running tasks like a colleague, conduct research, use tools, and execute complex operations. ...

