OpenAI announces GPT-5.5, its latest artificial intelligence model

OpenAI released GPT-5.5, a new AI model that performs better at coding, using computers, and research with less guidance from users. The model meets OpenAI's "High" cybersecurity risk classification, meaning it could amplify existing pathways to harm, though it does not reach the "Critical" threshold. The company conducted third-party testing and red teaming (adversarial testing where security experts try to break the system) and iterated on cyber safeguards for months before release.