AI News 2024年07月29日
The exponential expenses of AI development
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尽管科技巨头微软、谷歌和Meta从AI驱动的云服务中获得了巨额收入,但同时也在推动AI边界突破的巨大成本中苦苦挣扎。最近的财务报告描绘了一幅双刃剑的图景:一方面是令人印象深刻的收益,另一方面是惊人的支出。

📈 **AI模型的训练成本不断攀升**:随着对通用人工智能(AGI)的追求,公司开发了越来越复杂的模型,例如GPT-4等大型语言模型。这些模型需要巨大的计算能力,将硬件成本推高到前所未有的水平。 例如,OpenAI竞争对手Anthropic的首席执行官Dario Amodei在4月初的一次播客采访中表示,目前市场上的AI模型训练成本约为1亿美元。他说:“目前正在训练的模型,以及将在今年晚些时候或明年初发布的模型,训练成本更接近10亿美元。我认为到2025年和2026年,成本将上升到50亿或100亿美元。”

💻 **芯片短缺加剧了硬件成本**:对专门的AI芯片(主要是图形处理单元(GPU))的需求激增,导致芯片短缺,加剧了硬件成本问题。英伟达作为该领域的领先制造商,其市值飙升,因为科技公司争先恐后地获取这些必不可少的组件。用于训练AI模型的黄金标准H100图形芯片售价约为30,000美元,一些经销商的售价是其好几倍。 Meta首席执行官扎克伯格此前表示,该公司计划到今年年底前购买350,000块H100芯片,以支持其AI研究工作。即使他获得了批量购买折扣,这也会很快增加数十亿美元的成本。

💾 **数据中心和数据处理的成本**:现代AI模型的规模需要巨大的数据中心,这些数据中心也带来了技术挑战。这些设施的设计必须能够处理极端的计算负荷,同时有效地管理热量散发和能耗。随着模型变得越来越大,对功率的需求也随之增加,从而大幅增加了运营成本和环境影响。 此外,数据是AI系统的命脉,也带来了自身的技术挑战。对海量高质量数据集的需求导致公司在数据收集、清理和标注技术方面投入巨资。一些公司正在开发复杂的合成数据生成工具,以补充现实世界的数据,进一步推高了研发成本。

💼 **AI开发的快速步伐导致基础设施和工具迅速过时**:公司必须不断升级系统并重新训练模型以保持竞争力,从而形成一个持续的投资和过时的循环。 例如,微软在4月25日表示,其在最近一个季度花费了140亿美元用于资本支出,预计这些成本将“大幅增加”,部分原因是AI基础设施投资。与去年同期相比,这一数字增长了79%。谷歌表示,该季度支出为120亿美元,比去年同期增长了91%,预计今年剩余时间将“达到或超过”这一水平,因为它专注于AI机会。Meta则将今年的投资估算提高,现在预计资本支出将在350亿至400亿美元之间,高点将增长42%。该公司表示,“这反映了对AI研究和产品开发的大量投资”。

📆 **AI开发的高成本引发了对市场集中度的担忧**:与尖端AI研究相关的支出可能会将创新限制在少数资金雄厚的公司,从而可能扼杀该领域的竞争和多样性。 为了应对这些成本挑战,行业正在专注于开发更有效的AI技术。对少样本学习、迁移学习和更高能效模型架构等技术的探索旨在减少AI开发和部署所需的计算资源。此外,向边缘AI(在本地设备而不是云端运行AI模型)的推动,可以帮助分散计算负荷并减少对集中式数据中心的压力。 然而,这种转变需要在芯片设计和软件优化方面进行自身的技术创新。总的来说,很明显,AI的未来不仅取决于算法和模型设计方面的突破,还取决于我们克服AI系统扩展带来的巨大技术和财务障碍的能力。能够有效应对这些挑战的公司,很可能将在下一阶段的AI革命中成为领导者。

Tech giants like Microsoft, Alphabet, and Meta are riding high on a wave of revenue from AI-driven cloud services, yet simultaneously drowning in the substantial costs of pushing AI’s boundaries. Recent financial reports paint a picture of a double-edged sword: on one side, impressive gains; on the other, staggering expenses. 

This dichotomy has led Bloomberg to aptly dub AI development a “huge money pit,” highlighting the complex economic reality behind today’s AI revolution. At the heart of this financial problem lies a relentless push for bigger, more sophisticated AI models. The quest for artificial general intelligence (AGI) has led companies to develop increasingly complex systems, exemplified by large language models like GPT-4. These models require vast computational power, driving up hardware costs to unprecedented levels.

To top it off, the demand for specialised AI chips, mainly graphics processing units (GPUs), has skyrocketed. Nvidia, the leading manufacturer in this space, has seen its market value soar as tech companies scramble to secure these essential components. Its H100 graphics chip, the gold standard for training AI models, has sold for an estimated $30,000 — with some resellers offering them for multiple times that amount. 

The global chip shortage has only exacerbated this issue, with some firms waiting months to acquire the necessary hardware. Meta Chief Executive Officer Zuckerberg previously said that his company planned to acquire 350,000 H100 chips by the end of this year to support its AI research efforts. Even if he gets a bulk-buying discount, that quickly adds to billions of dollars.

On the other hand, the push for more advanced AI has also sparked an arms race in chip design. Companies like Google and Amazon invest heavily in developing their AI-specific processors, aiming to gain a competitive edge and reduce reliance on third-party suppliers. This trend towards custom silicon adds another layer of complexity and cost to the AI development process.

But the hardware challenge extends beyond just procuring chips. The scale of modern AI models necessitates massive data centres, which come with their technological hurdles. These facilities must be designed to handle extreme computational loads while managing heat dissipation and energy consumption efficiently. As models grow larger, so do the power requirements, significantly increasing operational costs and environmental impact.

In a podcast interview in early April, Dario Amodei, the chief executive officer of OpenAI-rival Anthropic, said the current crop of AI models on the market cost around $100 million to train. “The models that are in training now and that will come out at various times later this year or early next year are closer in cost to $1 billion,” he said. “And then I think in 2025 and 2026, we’ll get more towards $5 or $10 billion.”

Then, there is data, the lifeblood of AI systems, presenting its own technological challenges. The need for vast, high-quality datasets has led companies to invest heavily in data collection, cleaning, and annotation technologies. Some firms are developing sophisticated synthetic data generation tools to supplement real-world data, further driving up research and development costs.

The rapid pace of AI innovation also means that infrastructure and tools quickly become obsolete. Companies must continuously upgrade their systems and retrain their models to stay competitive, creating a constant cycle of investment and obsolescence.

“On April 25, Microsoft said it spent $14 billion on capital expenditures in the most recent quarter and expects those costs to “increase materially,” driven partly by AI infrastructure investments. That was a 79% increase from the year-earlier quarter. Alphabet said it spent $12 billion during the quarter, a 91% increase from a year earlier, and expects the rest of the year to be “at or above” that level as it focuses on AI opportunities,” the article by Bloomberg reads.

Bloomberg also noted that Meta, meanwhile, raised its estimates for investments for the year and now believes capital expenditures will be $35 billion to $40 billion, which would be a 42% increase at the high end of the range. “It cited aggressive investment in AI research and product development,” Bloomberg wrote.

Interestingly, Bloomberg’s article also points out that despite these enormous costs, tech giants are proving that AI can be a real revenue driver. Microsoft and Alphabet reported significant growth in their cloud businesses, mainly attributed to increased demand for AI services. This suggests that while the initial investment in AI technology is staggering, the potential returns are compelling enough to justify the expense.

However, the high costs of AI development raise concerns about market concentration. As noted in the article, the expenses associated with cutting-edge AI research may limit innovation to a handful of well-funded companies, potentially stifling competition and diversity in the field. Looking ahead, the industry is focusing on developing more efficient AI technologies to address these cost challenges. 

Research into techniques like few-shot learning, transfer learning, and more energy-efficient model architectures aims to reduce the computational resources required for AI development and deployment. Moreover, the push towards edge AI – running AI models on local devices rather than in the cloud – could help distribute computational loads and reduce the strain on centralised data centres. 

This shift, however, requires its own set of technological innovations in chip design and software optimisation. Overall, it is clear that the future of AI will be shaped not just by breakthroughs in algorithms and model design but also by our ability to overcome the immense technological and financial hurdles that come with scaling AI systems. Companies that can navigate these challenges effectively will likely emerge as the leaders in the next phase of the AI revolution.

(Image by Igor Omilaev)

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