Mingfei Gao

MintAct introduces a family of vision-language models at 2B, 4B, and 8B scales that unify UI grounding, multi-step navigation across mobile, desktop, and web, and visual tool use in a single set of weights through a shared screenshot-and-pixel observation space, prompt-conditioned per-domain action sets, and balanced cross-domain mixing, backed by asynchronous RL infrastructure hosting hundreds of concurrent instances, reaching 48.9 on OSWorld-Verified, 39.1 on Online-Mind2Web, and 67.0 on AndroidWorld while matching or exceeding size-matched per-domain specialists.

MintAct introduces a family of vision-language models at 2B, 4B, and 8B scales that unify UI grounding, multi-step navigation across mobile, desktop, and web, and visual tool use in a single set of weights through a shared screenshot-and-pixel observation space, prompt-conditioned per-domain action sets, and balanced cross-domain mixing, backed by asynchronous RL infrastructure hosting hundreds of concurrent instances, reaching 48.9 on OSWorld-Verified, 39.1 on Online-Mind2Web, and 67.0 on AndroidWorld while matching or exceeding size-matched per-domain specialists.