# Omni-Decision

The work presents Omni-Decision, an omni-modal agent that replaces the growing dialogue history with an explicit evidence ledger, where a critic reads each noisy observation and passes only usable content to the ledger so the planner works from a compact context throughout the task; each run records state, action, and verdict at every step, and supervised fine-tuning plus decision-level reinforcement learning on these trajectories further improve the planner, yielding state-of-the-art 81.4% accuracy on OmniGAIA at roughly 43% of Gemini-3.1-Pro's cost per question and 65.0% on WorldSense long-video understanding, level with the strongest end-to-end model.

The work presents Omni-Decision, an omni-modal agent that replaces the growing dialogue history with an explicit evidence ledger, where a critic reads each noisy observation and passes only usable content to the ledger so the planner works from a compact context throughout the task; each run records state, action, and verdict at every step, and supervised fine-tuning plus decision-level reinforcement learning on these trajectories further improve the planner, yielding state-of-the-art 81.4% accuracy on OmniGAIA at roughly 43% of Gemini-3.1-Pro's cost per question and 65.0% on WorldSense long-video understanding, level with the strongest end-to-end model.