Friday Aug 28
LABORAmazon

Amazon Is Shutting Mechanical Turk

28AUG
46% USED AI2005 - 2026SHUT SEP 30

MTurk closes September 30 after 21 years. Bezos once called it artificial artificial intelligence. A 2023 study found up to 46% of its workers were quietly using LLMs.

The marketplace stopped being human before Amazon stopped selling it as human.

Ground Truth and Augmented A2I go too. The whole cheap-labeling stack is being retired.

Expert annotation vendors now charge 50x per task and their prices keep climbing.

full brief & sources

⚡ Why this matters

  • MTurk trained the datasets that trained the models that replaced MTurk.
  • The 46% number means the marketplace stopped being human before Amazon stopped selling it.
  • This is the cleanest displacement story of the year - no interpretation needed.

🔍 What happened

  • Announced Aug 25, 2026. Service ends Sept 30, 2026.
  • New customer signups were cut off July 30, alongside SageMaker Ground Truth and Amazon Augmented AI (A2I).
  • MTurk launched in 2005 to label data and do micro-tasks machines could not.
  • A 2023 EPFL study estimated 33-46% of MTurk crowd workers used LLMs for text tasks.
  • Amazon is shutting the whole human-in-the-loop labeling stack, not just the marketplace.

💬 Smart takes

  • The labeling market did not die. It moved to expert vendors like Surge and Scale at 50x the price per task.
  • Cheap generic human labor lost. Expensive specialist human labor got more valuable.
  • Academic researchers lose their default subject pool. That is a quiet methodological problem.

🧭 Where this goes

  1. Watch where the 500,000 workers go. Prolific and Clickworker are the obvious catchers.
  2. Watch RLHF pricing. Expert annotation rates have been climbing all year.
  3. Watch for replication crises in papers that used MTurk panels after 2023.

🥄 The Spoon Take

Amazon built a marketplace for humans pretending to be machines and closed it because the humans started using machines. Nobody writes an ending that neat on purpose.

🤔 Pushback

MTurk has been neglected for a decade - the shutdown may be product hygiene, not an AI verdict. And the 46% figure is one 2023 study on text tasks, not the whole platform.

·Amazon Mechanical Turk end-of-life notice·Amazon shuts down Mechanical Turk after 21 years·Artificial Artificial Artificial Intelligence - EPFL, 2023