Calif used GPT-5.6 Sol to find a critical PHP flaw before attackers did
OpenAI says Calif found a critical flaw in PHP, the language that runs many websites, using GPT-5.6 Sol through OpenAI's Patch the Planet initiative, and Wiz independently reported both vulnerabilities. PHP's maintainers led the fixes, and OpenAI released a PHP version checker as a Codex skill to help operators spot vulnerable versions. OpenAI also committed $1 billion in subsidized Daybreak access for defenders with limited security resources, and expects similar findings to increase sharply in the coming months.