GPT-5.6 on a Government Leash: Sol, Terra, Luna and the First Frontier Model Gated Before Launch - June 29, 2026

GPT-5.6 on a Government Leash: Sol, Terra, Luna and the First Frontier Model Gated Before Launch On June 26, 2026, OpenAI launched GPT-5.6 in three tiers, Sol, Terra, and Luna, but access opened only to about twenty companies pre-approved by the U.S. government. We dig into why Washington asked OpenAI to hold the broad launch back over cybersecurity and national security concerns, how it echoes earlier limits on Anthropic's Fable 5 and Mythos 5, and what the looming "covered frontier models"...