Nvidia vs. Alphabet: Which Is the Best Artificial Intelligence (AI) Stock to Buy Now?

By Keithen Drury – Feb 21, 2026 at 1:42PM ESTKey PointsAlphabet's TPUs are a viable alternative to Nvidia's GPUs in some scenarios.Nvidia's are still the most popular computing units overall.Nvidia stock is cheaper than Alphabet right now -- something that doesn't often happen. These 10 Stocks Could Mint the Next Wave of Millionaires ›NASDAQ: NVDANvidiaMarket Cap$4.6TToday's Changeangle-down(1.02%) $1.92Current Price$189.82Price as of February 20, 2026 at 4:00 PM ETAlphabet and Nvidia are competing in processing units.Nvidia (NVDA +1.02%) and Alphabet (GOOG +3.74%) (GOOGL +3.95%) are two giants competing in the artificial intelligence build-out. For the most part, these two don't compete against each other, and Alphabet is primarily a client of Nvidia's. However, Alphabet has also built a graphics processing unit (GPU) alternative that competes with Nvidia's product, although it's serving a specific niche. Of these two, which one is the better AI stock to buy now? Image source: Getty Images. Alphabet's TPU is starting to challenge Nvidia's GPU Nvidia makes graphics processing units (GPUs), which have long been the go-to choice for computing problems that require massive horsepower. GPUs can process multiple calculations in parallel, making them a great option for arduous workloads like AI. GPUs are also great for other computing tasks, like cryptocurrency mining, drug discovery, engineering simulations, and their original use case, gaming graphics. However, when a GPU is only utilized for one specific workload for its entire life, the extra capacities that clients have to pay for are somewhat wasted. ExpandNASDAQ: NVDANvidiaToday's Change(1.02%) $1.92Current Price$189.82Key Data PointsMarket Cap$4.6TDay's Range$185.94 - $190.3352wk Range$86.62 - $212.19Volume178MAvg Vol174MGross Margin70.05%Dividend Yield0.02% That's where a specialized unit like the Tensor Processing Unit (TPU) from Alphabet comes in. Alphabet has spent the past decade developing the TPU in collaboration with Broadcom (AVGO 0.46%). Now, it has become a force in the AI computing world. TPUs aren't suited for every AI task, but they can excel in some areas, which is why Alphabet also keeps its partnership with Nvidia and maintains access to the latest and greatest hardware from it. Furthermore, a client likely won't want to run all of their workloads on Alphabet TPUs. The only place to gain access to them is through Google Cloud, and if all of your workloads are run on Alphabet-specific hardware, then it becomes impossible to switch to a different provider if the price soars too much or there is some other reason you want to switch. Maintaining a balance between Nvidia's GPUs and Alphabet's TPUs is a smart move for many clients, and it bodes well for both companies. ExpandNASDAQ: GOOGLAlphabetToday's Change(3.95%) $11.96Current Price$314.81Key Data PointsMarket Cap$3.8TDay's Range$303.90 - $316.5252wk Range$140.53 - $349.00Volume2.2MAvg Vol37MGross Margin59.68%Dividend Yield0.26% While Nvidia has other use cases for its GPUs outside of AI, the reality is that the majority of Nvidia's revenue is coming from this sector. Nobody knows what AI spending will look like five years from now, and this could become an issue for Nvidia if AI spending decreases. Alphabet doesn't have this problem. It has several other, non-AI businesses, like the Google search engine, YouTube, and its Google Cloud business. Google Cloud is Alphabet's cloud computing wing, and will thrive even after the AI build-out is complete because clients will still be running AI workloads on its servers. This subscription platform is a perpetual cash cow for the business, and also benefits from non-AI workloads. However, Nvidia is growing far faster than Alphabet. Nvidia provides more upside For their current fiscal years, Wall Street analysts expect Alphabet to grow its revenue at a 7% pace, while Nvidia grows at a 65% pace. That's a massive mismatch in growth and shows how much Nvidia is thriving versus Alphabet. Still, Alphabet's stock is more expensive from a forward earnings perspective. GOOG PE Ratio (Forward) data by YCharts As the chart indicates, this isn't a common occurrence recently and should be taken as a strong buying sign for Nvidia stock. However, I'd bet Alphabet stock is far more steady over the next few years, while Nvidia's is subject to the whims of the market's capacity for AI risk. I think both stocks are excellent to own, but Nvidia represents a stock that has much higher upside right now. Alphabet is still a solid pick and will be a steady grower, but its upside is fairly capped compared to Nvidia.Read NextFeb 21, 2026 •By Daniel SparksPrediction: This Will Be Nvidia's Stock Price in 5 YearsFeb 21, 2026 •By Keithen DruryFebruary 26 Could Be a Huge Day for the Stock MarketFeb 21, 2026 •By Jose NajarroNvidia Shareholders Received Amazing News From Meta PlatformsFeb 21, 2026 •By Keithen Drury1 Genius Stock Up Nearly 27,000% in the Past Decade to Buy NowFeb 21, 2026 •By Keithen DruryGot $5,000? Here Are 5 Must-Buy Artificial Intelligence (AI) Stocks Right Now.Feb 20, 2026 •By Robert IzquierdoShould You Buy Nvidia Stock Before Earnings?About the AuthorKeithen Drury is a contributing Motley Fool technology analyst covering AI, semiconductors, cybersecurity, and SaaS stocks. In addition to The Motley Fool, Keithen is a mechanical engineer and has held roles at Honeywell and smaller industrial companies like Brand Hydraulics and Lincoln Industries. He holds a bachelor’s degree in mechanical engineering from Dordt University.TMFTripleOptionStocks MentionedNvidiaNASDAQ: NVDA$189.82 (+1.02%) $+1.92AlphabetNASDAQ: GOOGL$314.81 (+3.95%) $+11.96AlphabetNASDAQ: GOOG$314.90 (+3.74%) $+11.34*Average returns of all recommendations since inception. Cost basis and return based on previous market day close.