Amazon shuts Mechanical Turk and bets AI no longer needs humans to train it

Amazon‘s Mechanical Turk is shutting down. For 21 years it ran one of the largest human-powered computing systems ever assembled — a marketplace where tasks too difficult for machines were broken into small, repetitive pieces and handed to workers who completed them for payments that could fall below a dollar an hour. That system has become unnecessary. Amazon is exiting it entirely.

The platform launched when Jeff Bezos coined the term ‘artificial artificial intelligence’ to describe the idea of computers outsourcing their weaknesses to humans. Workers worldwide received small digital jobs: deciding which objects appeared in an image so a self-driving system could learn to recognize them, transcribing a phone call, determining whether a product description belonged in the right catalog category. Each task paid a few cents. Completed at scale by 500,000 workers across 190 countries, they generated the training data that made modern AI capable of the same work.

The closure reaches past Mechanical Turk itself. Amazon’s SageMaker Ground Truth, a professional data-labeling tool for enterprises, and Amazon Augmented AI, a routing system for AI predictions that needed human review, will both close on the same date. Amazon is not merely retiring one aging product — it is withdrawing from the business of putting humans in the AI training pipeline entirely.

A 2023 academic study found that approximately 46 percent of Mechanical Turk workers were already using AI models to complete their assigned tasks. The platform had stopped generating human-verified data and was instead producing AI-verified output with human billing rates attached. The economics stopped making sense on both sides of the transaction. That study pre-dates most of the capability improvements that have come since.

The transition is not clean. The 500,000 workers on Mechanical Turk are not the population served by the newer data-labeling platforms (Scale AI, Mercor, Prolific) growing to fill the gap. Those companies serve enterprise clients, operate with quality tiers and long-term contracts, and pay substantially higher rates. The informal access that defined Mechanical Turk — opening a browser from anywhere, completing tasks with no application or approval — does not exist in the replacements. Workers in markets where formal employment is scarce and internet income is a meaningful supplement have no equivalent path.

Mechanical Turk launched in 2005. Amazon stopped accepting new requesters in July 2026; existing workers can continue submitting tasks until September 30. The company gave no detailed explanation beyond a standard note that it regularly reviews its services. The human-in-the-loop AI training era that Mechanical Turk industrialized has not ended — it is consolidating into a smaller, higher-cost professional market whose per-task economics bear no resemblance to the $0.01 jobs that built the first generation of large language models.

Tags: amazon, ai, crowdsourcing, data labeling, Mechanical Turk