JERUSALEM : Israeli cyber security start-up Apex, which focuses on protecting the rapid use of artificial intelligence (AI) tools, said on Thursday it received an undisclosed investment from OpenAI Chief Executive Sam Altman. In all, Apex raised $7 million in a seed funding round led by Sequoia Capital and Index Ventures, with participation from Altman and others, it said. Altman did not immediately comment. Apex said it had been running trials with a number of Fortune 500 companies and investment firms and was close to finalising paid contracts.