Miami startup Subquadratic's bold claim of a 1,000x AI efficiency gain with its SubQ model is drawing skepticism as researchers call for independent verification, while Meta and Google advance competing AI agent strategies — Meta developing "Hatch" alongside an Instagram shopping tool, and Google building its own autonomous agent to rival OpenAI. Meanwhile, the US government has announced safety testing of new AI models from Google, Microsoft, and xAI, signaling growing regulatory scrutiny of frontier AI systems.