Amazon Is Quietly Closing the Original 'Human-Powered AI' Marketplace

Amazon Mechanical Turk (MTurk), the crowdsourcing platform that quietly powered a huge amount of AI research for two decades, is closing its doors to new customers on July 30, 2026. Existing customers keep access, but no new signups, and no new features — a slow wind-down rather than a hard shutdown.

Launched back in 2005, MTurk let companies pay small amounts of money to real people, worldwide, to do tiny tasks computers couldn’t handle well: labeling images, transcribing audio, rating whether a sentence made sense. If you’ve ever wondered how AI models learned to recognize a cat in a photo or judge if a chatbot’s answer was helpful, the honest answer for years was: thousands of anonymous MTurk workers did that labeling, one task at a time, for cents each. In 2018, Amazon leaned into this and repositioned MTurk specifically as an AI data-labeling tool, tying it into AWS’s SageMaker platform.

That pivot is exactly what’s now making MTurk obsolete. Generative AI has absorbed most of that labeling workload over the past three years — AWS now points data-labeling customers toward SageMaker Ground Truth, which uses AI to generate labels first and has humans review them, flipping MTurk’s original human-first model on its head. There’s also a credibility problem baked in: a 2023 analysis found that somewhere between a third and nearly half of MTurk workers were themselves using AI to help complete their “human” tasks, which undercuts the whole point of paying for human judgment.

What’s actually going on: this is a quiet but telling milestone. MTurk was, in a real sense, the invisible labor market that helped build modern AI — every “human-in-the-loop” dataset had to come from somewhere. Now the technology it helped create has gotten good enough to mostly replace the process that trained it. That’s not a dramatic AI-takes-over-the-world story; it’s a smaller, very concrete example of automation eating its own supply chain, one annotation task at a time.

What this means for you: if you’re not in tech or research, this changes nothing day-to-day — it’s a B2B infrastructure shift, not a consumer product. If you’ve ever worked as an MTurk “turker” for side income, or you’re a researcher who relied on it for quick human-subject studies, this is worth planning around now: alternatives exist (Prolific, specialized labeling firms, AI-assisted platforms), but the era of MTurk as the default cheap-and-easy option for human data is ending.

Sources

• Amazon Closes Mechanical Turk to New Customers as AI Renders Its Crowdsourced Labour Model Obsolete (The AI Insider)
• Amazon to close Mechanical Turk to new customers in July 2026 (TechBriefly)