Touchcast Inc., a startup specializing in caching generative artificial intelligence queries, is set to raise $100 million from venture backers, including Microsoft Corp (NASDAQ:MSFT), an investor in OpenAI. The New York-based company stores and delivers responses for frequently used AI prompts, aiming to reduce computational and energy requirements for models like OpenAI’s GPT-4. The initiative seeks to lower costs and enhance deployment efficiency for developers and businesses, according to a report from Bloomberg. Accenture Plc (NYSE:ACN) backed Touchcast is expected to reach a valuation of…