Tether 800M AI Agent Outperforms Models 2.5x Its Size on Phone Tasks

Tether AI Research released BotPsy-0.8B, an 800-million-parameter open-weight model designed for local AI agents that can execute multi-step phone and tool tasks. In Tether's testing, BotPsy beat Qwen3.5-2B-Think despite being 2.5 times smaller and roughly doubled its base model's scores across four core agentic benchmarks.