GPT-5.6 arrives as a limited preview with three tiers, but the real story is the tight coupling of cyber capability claims and safety gating around Sol, the flagship model.
The limited preview of GPT-5.6 pairs stronger cybersecurity capability with layered safeguards, showing how frontier AI releases are now engineered as much for restraint as for performance.
A limited preview of GPT-5.6 shows how advanced AI is being shipped less like software and more like sensitive infrastructure, with access controls and policy pressure shaping the rollout.
The new Sol, Terra, and Luna preview arrives for a narrow set of companies, with cyber safeguards and controlled access now part of the launch itself.