OpenAI previews GPT-5.6 Sol, with a deliberately restricted rollout

OpenAI has published a preview of GPT-5.6 Sol, which it describes as its strongest model yet, with improved agentic abilities in coding, biology and cybersecurity.

What OpenAI says

• the release will be phased, with heavier safeguards
• it spent over 700,000 A100-equivalent GPU hours on automated red-teaming for universal jailbreaks
• there is a new "max" reasoning-effort tier
• it is coordinating with the US Administration on a cyber Executive Order framework before wider availability

This rests on OpenAI's own preview page; we haven't seen independent reporting on it.

Why it matters

The frontier is still getting bigger, and here the step up in capability comes with a release that is restricted on purpose and coordinated with government. That is a different kind of launch from a normal model drop, though the changes most people will feel this week came from much smaller models.