GPT-5.5-Cyber Reaches the EU: What It Means (2026)
June 6, 2026
OpenAI is extending GPT-5.5-Cyber to vetted European defenders under its EU Cyber Action Plan. Here's what the cyber-permissive model unlocks and who gets in.
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GPT-5.5 Cyber Eval: AISI Finds Parity with Mythos 2026
May 8, 2026
UK AI Security Institute's April 30 GPT-5.5 cyber eval reveals parity with Claude Mythos on expert CTF tasks and the 32-step Last Ones attack range.