Five of the leading frontier AI companies have, at most, partially implemented the basic practices needed to keep control of their own AI systems, and none has published a complete plan for containing a model that turns against its operator, according to a new assessment from Guidelight AI Standards grading Anthropic, Google, Meta, OpenAI, and xAI, with information current through August 18, 2026. The assessment, Guidelight’s first, scores each company from 0 to 5 on six practices drawn from…