OpenAI has introduced GPT-Rosalind, a powerful AI model for biology research, and launched Rosalind Biodefense to help developers build new biodefense capabilities. This technology can aid scientists in understanding diseases and developing new therapies, but also poses biological security risks. To address this, OpenAI is releasing a biodefense action plan to promote a more resilient biological future. The plan aims to enhance threat detection, speed up countermeasure development, and improve crisis response. Why it matters: this initiative marks a crucial step in harnessing AI for biological security, highlighting the need for responsible development and deployment of advanced biotechnology capabilities.