OpenAI GPT-5.6 Launched: "Many Changes" After US Review

OpenAI has launched its new GPT-5.6 artificial intelligence model. The company's chief executive stated they made "many changes" to the system during a security review with the US government. CEO Sam Altman told CNBC that US officials tested the model and raised concerns. He said it was a collaborative process, resulting in many changes. The new GPT-5.6 series includes three tiers: Sol, the flagship model; Terra, a mid-range version; and Luna, a fast, low-cost option. Altman touted Sol's performance, calling it "not only the best model in the world for most people" and "54% more token efficient on tasks." What's interesting is that the Trump administration gave OpenAI the green light for the broad launch after technical testing and meetings. This development matters because it highlights the ongoing collaboration and concerns between AI developers and government bodies regarding powerful new technologies.