A new generation of cost-efficient, high-performance Chinese AI is putting pressure on Silicon Valley's leading labs to lower prices to grab market share as they try and find ways to turn a profit.ChatGPT maker OpenAI has slashed fees by 80 percent for its latest lightweight model "Luna", and Anthropic has unveiled a model approaching its most powerful system's performance at half the price.Meanwhile some of China's buzziest AI companies are raising fees as their open-source offerings gain traction among businesses and programmers worldwide.DeepSeek -- whose V4 Flash tops the usage leaderboard of technical platform OpenRouter -- said last week it plans a "significant increase" in prices for programmers.Thirsty Beijingers have another option: free AI for customers at AGI Bar, which opened last summer as a hub for developers, founders and investors.The bar is decorated with references to China's AI boom, with logos of the country's major labs on the walls and the menu full of jokes riffing on tech jargon.Its signature drink AGI -- "Artificial General Intelligence", meaning future AI tools as clever as humans -- is a glass almost entirely full of beer foam, a nod to the frothy hype rife in the industry."It's quite common for bars to provide free Wi-Fi with routers, so I'll provide free tokens," or units of AI usage, bar owner Song De told AFP.ChallengersThe bar in Zhongguancun, often called China's Silicon Valley, has two boxy Nvidia workstations to self-host DeepSeek V4 Flash -- meaning Song doesn't need to pay the Chinese startup to use its model.Large language models are the technology that underpins chatbots and other AI tools by crunching vast amounts of digital data.Song, an independent AI developer himself, is one of many swapping the most cutting-edge, bells-and-whistles -- and expensive -- models, like Anthropic's Fable 5, for leaner alternatives like V4 Flash.These are much cheaper to run and good enough for many purposes, such as helping run AI agents that can carry out real-world tasks autonomously, experts say.