Anthropic, an AI start-up, has raised $3.5 billion in a funding round led by Lightspeed Venture Partners, valuing the company at $61.5 billion.The company has raised a total of $14.8 billion since its founding in 2021 and counts Amazon, Google, and Salesforce among its investors.The funding activity for prominent AI start-ups is on the rise, with OpenAI and Elon Musk's xAI also in talks for significant financing rounds.Anthropic's CEO, Dario Amodei, founded the company with the aim to develop AI with ethical considerations, following his departure from OpenAI.