Summary

  • Tether said it has launched QVAC BotPsy, an on-device AI that can run on users' devices.
  • It said QVAC BotPsy outperformed Qwen3.5-0.8B-Think on key benchmarks including BFCL v4 and ACEBench in its internal testing.
  • Tether added that QVAC BotPsy features open weights, reduced need to transmit personal data, and fewer tool-call errors.

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Tether, the issuer of the USDT stablecoin, has released a compact artificial intelligence model that runs on users' devices.

Tether launched its on-device AI model, QVAC BotPsy, on Nov. 11. Built on Alibaba's Qwen3.5 architecture, the model has 800 million parameters. It is being distributed as an open-weight model.

In Tether's internal testing, QVAC BotPsy scored nearly twice as high as its base model, Qwen3.5-0.8B-Think, across four major tool-use benchmarks, including BFCL v4 and ACEBench. Tether also said QVAC BotPsy outperformed Qwen3.5-2B-Think in those tests, even though that model has 2.5 times more parameters.

Tether said QVAC BotPsy can reduce the need to send personal data such as emails and calendar information to centralized service providers. The company added that the model is designed to reduce errors that generate calls to nonexistent tools when no suitable tool is available for a request.

JOON HYOUNG LEE