Chinese OpenAI contenders MiniMax and Zhipu AI offered the first look into their business models and profit prospects in listing filings, revealing revenue constraints compared with their deep-pocketed Silicon Valley peers.The two outfits, which count Alibaba Group Holding Ltd. and Tencent Holdings Ltd. among their common backers, are in a heated race to become the first domestic generative AI startups to go public. Among the survivors of a brutal price war once dubbed the “Battle of One Hundred...