OpenAI unveils GPT-5.6 Sol cybersecurity model with restricted, government-approved access

OpenAI unveiled GPT-5.6 Sol, which it calls its most advanced cybersecurity model, alongside companion Terra and Luna variants. The company said it dedicated more than 700,000 A100-equivalent GPU hours to automated red-teaming aimed at finding and closing universal jailbreaks before release — an unusually large safety-compute disclosure that signals how seriously frontier labs now treat cyber-offense risk.

Crucially, access is restricted: GPT-5.6 Sol is available only to customers approved by the Trump administration, delivered via API and Codex during an ongoing cybersecurity review, with broader ChatGPT rollout planned in the coming weeks. This is the second frontier lab in a week to ship a model under government-gated distribution, following the same review-then-release framework that surrounded Anthropic's Fable 5 and Mythos 5 — and it cements a new norm where the most capable cyber-relevant models debut behind an access wall.

OpenAI paired the launch with GeneBench-Pro, a research-level benchmark for computational biology that President Greg Brockman said poses problems taking human experts 20–40 hours, and on which GPT-5.6 Sol is 'a big step forward.' That reflects OpenAI's broader push into judgment-heavy scientific agents, competing directly with Anthropic's Claude Science.

Separately, OpenAI confirmed roughly $122 billion in committed capital at an ~$852 billion post-money valuation, underscoring the scale of capital chasing frontier AI even as release controls tighten. Community reaction was mixed: developers debated who controls access to frontier AI, with some outlets skeptical of the 'too dangerous to release broadly' framing. Watch for the promised broader ChatGPT availability date and whether approved-customer lists become public.