Fal, a fast-growing cloud service for accessing and storing AI models that generate images, video, and audio, is in talks to raise $300 million to $350 million, according to a person with direct knowledge of the fundraise. The deal, which would nearly double the company’s paper valuation to around $8 billion from a financing three months ago, shows intense demand from investors for startups that can run AI models quickly for customers, a process known as inference.