Models & LLMs

Block's New Voice Model Sounds Eerily Human

Block's new voice model, Dessa, is designed to sound naturally human with emotions and nuances, running locally on consumer-grade hardware.

TechCrunch AI · Oct 24, 2026

What happened

  • Dessa is a full-duplex speech model that can run locally on a MacBook M4 Max.
  • Dessa is trained entirely on human speech and uses emotion built into its model.
  • Dessa can mimic emotions like tiredness, laughter, and crying in conversations.

Why it matters

Block's new voice model could revolutionize how humans interact with AI, offering a more natural and emotionally responsive experience. If successful, it could change the landscape of voice assistants and improve user engagement with AI systems.

The Elephant take

🐘 鼋 Block’s Dessa model is a bold attempt to make AI sound human, but it's unclear if the emotion is truly built-in or just simulated. The company claims it's a GPT3 moment for speech, but we'll have to wait and see if it's as impactful.

Who should care

  • AI developers
  • voice assistant users
  • block company executives

What to do next

  1. Test the model for potential safety issues
  2. Evaluate its emotional responsiveness in real conversations
  3. Assess its performance on consumer-grade hardware
  4. Monitor its impact on user engagement with AI

Keep in mind

The model is not yet publicly available and may have safety concerns that need testing.

Read the original reporting at TechCrunch AI ↗