Fara1.5 – A family of frontier computer use agent models – Microsoft Research

Fara1.5 – A family of frontier computer use agent models – Microsoft Research

By Aravind Rajeswaran
Publication Date: 2026-05-21 19:00:00

By: Ahmed Awadallah, Sahil Gupta, Yash Lara, Yadong Lu, Hussein Mozannar, Akshay Nambi, Zach Nussbaum, Yash Pandya, Aravind Rajeswaran, Corby Rosset, Alexey Taymanov, Luiz do Valle, Vibhav Vineet, Spencer Whitehead, Andrew Zhao


We are excited to introduce the Fara1.5 family of computer use agent (CUA) models for the browser: Fara1.5-4B, Fara1.5-9B, and Fara1.5-27B.

Figure 1. Task Success Rate (%) with Automated Evals. Fara1.5-9B outperforms other similarly sized models and sets a new SOTA for its size class.

Building on our work from Fara-7B, the Fara1.5 models represent a major step forward for agentic small language models (SLMs). Across the family, these models are the most capable CUA models for their respective model sizes while remaining practical to deploy on modest hardware.

The Fara1.5 models can complete a wide range of complex tasks in the browser, like comparing products, filling out forms, booking events, and more. Compared to Fara-7B, we see…