OpenAI has officially gained an advantage over Anthropic in the field of AI-powered cybersecurity. Its GPT-5.5 Cyber model reaches 85.6% on CyberGym, compared to 83.8% for Mythos 5. While Anthropic remains faced with a suspension imposed by US authorities, OpenAI is multiplying international partnerships and expanding its Daybreak program. This momentum could strengthen its global influence in the strategic sectors of cybersecurity and artificial intelligence.