Amazon overspent $1.8 million — 860% over budget — on Claude for routine coding tasks

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Amazon's Claude Sonnet project cost $1.8 million, 860% over budget

The overspending remained undetected internally for nearly five months straight

A financial auditing tool project exceeded its budget by $541,000

Amazon has confirmed an internal Claude Sonnet deployment intended for matching author details with product listings ballooned far beyond its planned budget.

The Financial Times found the project ultimately cost the company $1.8 million, marking an increase of 860% over the original allocation.

The overspending went undetected for roughly five months, raising fresh questions about how closely Amazon tracks its growing AI expenditures internally.

Mounting costs across multiple projects

Amazon's Claude-related overspend was not an isolated incident within the company's broader push toward deploying autonomous coding agents across various internal teams.

A separate project meant to build a financial auditing tool reportedly exceeded its budget by $541,000, compounding concerns about unchecked automated spending.

Another logistics-focused initiative, designed to shorten delivery times across Amazon's broader distribution network, incurred an additional $134,000 in unplanned costs.

Company insiders explained that mistakes once considered trivially cheap have grown catastrophically expensive as token-based pricing models replaced older subscription arrangements.

This shift coincides with AI agents gaining broader autonomy, allowing errors to multiply quickly before human reviewers noticed the growing financial damage.

Amazon pushes back on the narrative

In response, Amazon issued an internal statement acknowledging ongoing experimentation while disputing characterizations of these incidents as routine business practice.

"As with any new technology, we're experimenting, learning and improving how we use it, including how we drive cost efficiencies," the company said.

The company further stated that isolated examples portrayed as business as usual do not accurately capture how its teams actually apply AI tools .

Amazon's quarterly revenue exceeds $181 billion, meaning the disclosed AI overspending accounts for less than 0.1% of one month's earnings.

This pattern of AI-driven cost overruns follows earlier troubles at AWS, where automated coding bots triggered several unexpected service outages this year.

Amazon responded to those outages by restricting AI agent permissions rather than granting them access equal to senior engineers overseeing similar tasks.

The company also discontinued an internal leaderboard once used to track employee AI usage, as rising costs prompted a reconsideration of that approach.

Executives across the industry continue framing AI spending as a necessary investment despite growing evidence of inconsistent returns.

Amazon's continued experimentation with AI-driven coding tools comes despite skepticism from other corners of the tech industry regarding its actual business value.

Uber's chief technology officer, whose company also operates a substantial logistics network, has publicly stated no clear connection exists between heavy AI adoption and successful software delivery.

This skepticism stands in contrast to Amazon's own internal messaging, which frames the company's approach as ongoing experimentation rather than a fully validated cost-saving strategy.

Some analysts now argue that unchecked automation could quietly erode profit margins long before leadership notices meaningful financial impact.

For a company of Amazon's scale, these overruns remain financially minor, though they suggest oversight gaps that smaller companies may struggle to absorb.