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The most interesting thing about Amazon’s Q1 2026 print was not the headline. AWS pulled in $37.6 billion in revenue, up 28% year over year, with operating income of $14.2 billion at a 37.7% operating margin. The interesting part was what those numbers said relative to everyone else. Oracle and CoreWeave both missed on cloud profitability. Microsoft Azure margins ticked down. Google Cloud margins look great on paper but exclude DeepMind training costs. AWS is the only hyperscaler whose margins are inflecting upward, and the data points to that gap widening for the rest of 2026.
The Q1 2026 setup
AWS expanded EBIT margins by roughly 213 basis points quarter over quarter, an unusual move for a business this size. The driver was not generic AI demand. It was a very specific product called Amazon Bedrock, which lets enterprises rent frontier models like Claude on AWS infrastructure. In Q1 alone, Bedrock processed more tokens than in all prior years combined, and customer spend on the service grew 170% sequentially. SemiAnalysis estimates Bedrock is now a $5.5 billion run rate business, with 80 to 90% of customers running Anthropic models.
The math gets more interesting. Bedrock represents only about 4% of total AWS revenue today, but it accounted for an estimated 30% of the year over year step up in AWS gross profit dollars. That is the definition of margin accretive. Most of AWS is still IaaS, with relatively flat unit economics. Bedrock is pulling the mix upward by itself.
Why Bedrock margins are structurally different
This is the part that does not get enough airtime. A traditional GPU IaaS contract is a five year take or pay deal where the hyperscaler eats the depreciation and the customer commits to a fixed spend. Margins are decent but not extraordinary. The Bedrock arrangement with Anthropic is different. AWS earns a flat IaaS fee on the underlying compute, then layers a revenue share on top because it is also the distribution and marketplace layer. Anthropic books the gross token revenue, AWS collects the infrastructure fee plus a cut. SemiAnalysis models the resulting Bedrock EBIT margin at roughly 55% at current usage levels, well above the IaaS baseline.
The other CSPs are not in the same position. Azure’s AI revenue is still over 80% IaaS, driven by the OpenAI compute contract. Google Cloud is similarly IaaS heavy, with Gemini API as a smaller slice. AWS is the only hyperscaler where token as a service is a meaningful share of AI revenue, and it is the highest margin slice.
Anthropic just had the most violent quarter in software history
Anthropic added roughly $21 billion in net new annualized revenue in Q1 2026, going from $9 billion to $30 billion ARR in four months. Most of it is enterprise API spend, much of that flowing through Bedrock. Claude Code alone went from launch in mid 2025 to a $2.5 billion run rate by February 2026, with business subscriptions quadrupling since January. Anthropic’s inference gross margins moved from negative 94% in 2024 to 38% in 2025 to the mid 60s today. Every one of those data points helps Bedrock’s margin profile at AWS.
Amazon doubled down. The new $25 billion Anthropic investment announced alongside Q1 sits on top of the $8 billion already committed and locks in a multi gigawatt compute relationship. The AWS backlog now sits at $364 billion, and that figure does not yet include the latest Anthropic deal worth over $100 billion.
Vertical integration is doing real work
Bedrock margins also benefit from AWS shifting workloads onto its own silicon. Per AWS CEO Matt Garman in November 2025, Trainium chips already power more than 50% of Bedrock token usage. Trainium has a particular advantage in high batch inference and reinforcement learning workloads, exactly the patterns that dominate Claude usage. On the CPU side, Graviton4 is now the head node for new Trainium3 clusters and is becoming standard for agentic and RL workloads. Each of those substitutions chips away at the Nvidia and Intel cost line.
The capacity moat
None of this works without compute, and AWS is winning the buildout race. NextGig’s AI CapEx Tracker shows Amazon outpacing every other hyperscaler in 2025 and 2026, with the gap widening in 2027 forecasts. Microsoft had a year long datacenter pause and is now stuck contracting expensive Neocloud capacity to keep up. Google has the silicon advantage but is supply constrained across too many fronts. AWS has signed multi billion dollar PPAs with Talen, Vistra, and NiSource, and is rolling out a more modular datacenter design that is shaving months off deployment cycles.
The bottom line
The thesis is simple. AWS has the right mix (Bedrock and TaaS over IaaS), the right partner (Anthropic during the steepest growth curve in software history), the right silicon (Trainium and Graviton), and the right footprint (more committed power than anyone but Google). SemiAnalysis estimates that Bedrock alone will contribute 9 points to AWS revenue growth in Q2 as Anthropic’s ARR per megawatt scales further. Margins expand from there. Wells Fargo nudged its Amazon price target to $312 on the same logic in May, and the consensus is starting to catch up. The AI CapEx dashboard makes the structural lead easy to see month by month. Watch the Bedrock mix and the Trainium utilization in the next two earnings prints. If both keep climbing, the AWS margin story has another year to run before anyone else even gets to the starting line.
