Decision model Jev passes 1M users as OpenAI ships a Decisions API

According to a 36Kr report on November 4, 2026, startup TypeSafeAI released a model called Jev in mid-September. Jev does not generate content, does not chat, and does not even output complete sentences; it takes an input, classifies it into one of a set of predefined options, and returns a yes/no answer, a score, or a probability. The report claims that within a few weeks of launch Jev passed one million users, around one-third of the Fortune 500 had begun using it, and the company's valuation rose from roughly $200M to $7.5B within 24 days. The same report says Jev's rise brought a new category name into circulation: decision models. OpenAI followed up with the Decisions API within two weeks, AWS, Microsoft, and Cloudflare entered in turn, and more than ten similar products emerged in under a month. Zhao Tiancheng, CEO and chief scientist at OmAI Lianhui, is quoted saying that many scenarios do not need eloquent generated content but rather a continuous series of fast, measurable decisions. Large language models can also make many decisions, he notes, but decision models are fast models that focus all their capability and effort on decisions that are measurable and verifiable, targeting use cases where the need is not a piece of generated content but a directly usable judgment: fast, low-cost, and readable on edge devices. The report concludes that the rapid rise of decision models reflects a shift in how AI models are valued, extending beyond content generation quality to decision accuracy, response speed, and execution cost.