
OpenAI Claps Back Hard at Anthropic with GPT-5.4-Cyber: Real Cyber Defense for the Actual World, Not Just the Elite
OpenAI just threw a gauntlet at Anthropic.On April 14, 2026, the company launched GPT-5.4-Cyber — a specialized, cyber-permissive version of GPT-5.4 — and massively scaled its Trusted Access for Cyber (TAC) program.













