# Tether’s Tiny AI Agent Beats Models 2.5 Times Its Size at Controlling Your Phone

- URL: https://talkfuse.com/story/tethers-tiny-ai-agent-beats-models-2-5-times-its-size-at-controlling-your-phone/
- Published: 2026-11-11T19:36:02+00:00
- Updated: 2026-11-11T20:34:21+00:00
- Original publisher: Decrypt
- Original article: https://decrypt.co/383066/tether-tiny-ai-agent-beats-models-phone
- Topics: AI, Technology

## Key points

- Tether released an 800-million-parameter AI agent for personal devices.
- BotPsy led five of six tool-use evaluations in Tether’s tests.
- The open-weight model is designed for local deployment.

## Summary

Tether has unveiled QVAC BotPsy, an 800-million-parameter AI agent designed to carry out tasks in software on personal devices. In the company’s tests, it outperformed models with up to 2.5 times as many parameters, suggesting smaller models could handle some practical assistant tasks without relying on large cloud systems.

BotPsy is based on Alibaba’s Qwen3.5-0.8B model, further trained to use software tools and recover from problems. It scored 44.0% on the BFCL v4 tool-use benchmark and 58.7% on ACEBench; across six evaluations, it ranked highest in five and averaged 45.0%, compared with 38.8% for the larger Qwen3.5-2B. Tether says the model is available under the Apache 2.0 licence, with compressed versions for local use.

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Summarised by TalkFuse (https://talkfuse.com/). Quote the original publisher for the reporting and link this page for the summary and discussion.