OpenAI announced Rosalind Biodefense on May 29, 2026, to help trusted developers build new biodefense and pandemic preparedness capabilities. The initiative aims to accelerate the development of practical tools that strengthen societal resilience against biological threats. OpenAI will sponsor access to GPT-Rosalind and provide launch support to trusted developers working on frontier biosecurity applications. These applications span areas such as epidemiological modeling, early detection, screening, preparedness, and non-pharmaceutical interventions (NPIs). At launch, OpenAI is supporting a first set of organizations developing frontier applications across the biological defense stack. Their work covers the lifecycle of biological threats, from prevention and early detection to societal resilience and medical countermeasure development. This includes work by Fourth Eon Biosecurity, which builds adaptive screening infrastructure that evolves alongside new technologies like AI. Fourth Eon uses GPT-Rosalind to develop AI-native biosecurity screening systems that analyze sequences and generate detailed threat assessments. Gary Abel, Co-Founder & Chief Scientist at Fourth Eon, stated, 'We’re excited to test OpenAI’s GPT-Rosalind in Fourth Eon’s work developing AI-native biosecurity screening systems that analyze sequences and generate detailed threat assessments.' OpenAI also expanded trusted access to GPT-Rosalind for select U.S. government and allied partners with public health and biodefense missions. This access enables qualified teams to apply frontier AI to high-impact workflows like early warning systems, outbreak response planning, diagnostics, and medical countermeasure development. *Source: [openai](https://openai.com/index/strengthening-societal-resilience-with-rosalind-biodefense/)*