OpenAI Launches GPT-5.6 Model Trio

OpenAI is releasing its GPT-5.6 series this Thursday, featuring three distinct models: Sol for deep reasoning and agents, Terra for balanced performance, and Luna for speed and cost-efficiency. The company claims the flagship Sol model reduces factual hallucinations compared to previous versions.

These models arrive amid new US government oversight. While the administration now requests voluntary access to frontier models for review, officials confirmed they did not formally approve this release.