The notice appeared on the Mechanical Turk homepage late Tuesday, a single line with no ornament: “Mechanical Turk will close September 30, 2026.” Amazon.com Inc. confirmed the shutdown with a brief statement, saying it “regularly evaluates its programs, tools, and services” and had decided to retire the platform. The company gave no detailed reason, named no replacement service, and pointed workers and requesters to an FAQ page.
The message ends a marketplace that defined online gig labor before the word “gig” entered common use. Mechanical Turk, known as MTurk, launched in 2005 as an Amazon experiment in distributing small digital tasks, data labeling, audio transcription, surveys, content moderation, to a global pool of anonymous workers paid cents per assignment. The name came from an 18th-century hoax: a chess-playing automaton built in 1770 that toured Europe and astonished audiences until the human operator hidden inside the cabinet was revealed. Jeff Bezos, Amazon’s founder, drew the same joke in a 2006 speech, calling the service “artificial artificial intelligence,” humans supplying the judgment that computers lacked.
What MTurk built reached far beyond Amazon. Much of the manual labeling behind ImageNet, the image dataset that powered the deep-learning boom, was done by MTurk workers. The Allen Institute for AI used the platform to build common-sense datasets for its models. Startups and academic laboratories used it for surveys, image sorting, and any task too small for a vendor. At its peak around 2011, MTurk connected more than 500,000 registered workers across 190 countries, and nearly 50,000 people in 167 countries sorted and labeled billions of candidate images for ImageNet alone.
For workers, the economics were thin and the protections thinner. Researchers who studied the platform estimated median hourly earnings near two dollars, with no benefits, no employment relationship, and no recourse beyond the goodwill of the requester who posted the task. Requesters could reject assignments without pay, and worker forums filled with complaints about unpaid labor and accounts suspended without explanation. The platform became shorthand for both the promise and the precariousness of remote piecework.
For the research community, the closure removes a tool that had become a default. Psychologists, economists, and computer scientists built experiments on MTurk because it delivered participants in hours at a fraction of the cost of a survey firm. The platform’s workers answered questionnaires, judged language, and sorted images for studies that would have been impractical any other way, and its API made the process simple enough that a single graduate student could run a thousand-participant study in a weekend. In online forums this week, workers shared the news with a mixture of resignation and relief, some describing the platform as a lifeline that paid rent, others as a trap they had long wanted to leave. Amazon did not say how many active workers would be affected, and it has not announced transition support for the workforce.
The shutdown lands at a moment when the machines MTurk helped train have absorbed much of the work it once distributed. Model builders now use artificial intelligence to pre-label data and reserve humans for reviewing doubtful cases, a hybrid pipeline that has reduced demand for a generic microtask marketplace. Specialized vendors such as Scale AI and Appen, research platforms like Prolific, and private workforces have taken the rest. Amazon’s terse announcement, citing an internal assessment of the program’s future, said little more than that the calculus had changed.
The timing carries its own symbolism. The same week Amazon retired the human-powered marketplace, its cloud division announced another two million Nvidia GPUs on order, with delivery spread across 2027 and 2028, a commitment worth tens of billions of dollars. The company that once sold human judgment by the task now rents machine intelligence by the chip. Mechanical Turk’s eventual replacement, in Amazon’s own catalog, is the model that the platform’s labor helped create.
Until Sept. 30, tasks will continue to flow through the platform, according to the notice. Amazon has not said what will happen to requester balances or worker payments still in process when the closure takes effect, and it urged users to export their records before the deadline. The AWS services that used MTurk as a workforce option, SageMaker Ground Truth and Augmented AI, will lose that option when the platform goes dark, a change with real consequences for teams that built labeling pipelines on top of the marketplace.
MTurk’s legacy will outlast the platform. Every modern AI system that checks its own work, every pipeline that uses human reviewers to catch model mistakes, descends in some line from the marketplace that made human judgment a callable function. The name Amazon chose, with its 18th-century joke about a machine with a person inside, turned out to be a description of the industry’s first decade: the intelligence was artificial, but only in the sense that it was borrowed. On Sept. 30, the rental ends.
For the researchers and developers who depended on it, the closure accelerates a migration already under way toward specialized labeling providers and AI-first pipelines. For the workers who built their days around HITs, human intelligence tasks in the platform’s own acronym, the notice is a deadline with no successor announced. The automaton that gave MTurk its name hid a chess master inside. Twenty-one years later, the humans have been told the cabinet is closing, and the machine is expected to play on its own.
