OpenAI's been busy this month. On May 7 — the same week GPT-5.5 Instant became the default for every ChatGPT user — the company quietly opened a limited preview of something else entirely: GPT-5.5-Cyber. A security-focused variant of GPT-5.5 with different access rules, different use case permissions, and a specific target audience — vetted cybersecurity defenders and enterprise security teams. This isn't a product announcement buried in a blog post. OpenAI published dedicated coverage across multiple pages, and the participant list includes Bank of America, BlackRock, Cisco, CrowdStrike, JPMorgan Chase, NVIDIA, and Oracle. When those names are on the beta list, the preview is real. Here's what's actually going on. Three GPT-5.5 Models, Three Different Things Before we get into the Cyber preview, let's clear up what could easily become a confusing situation. There are now three distinct GPT-5.5 products. They share a version number and not much else.…