“No Reasons, Just Probabilities”: How Microsoft-Decision-1 Swaps an LLM Out of the Agent “Checkpoint” for a 9B Judge
Microsoft has released Decision-1, a model built purely for judging. It writes no prose—it returns only calibrated per-option probabilities as JSON. Input costs $0.042 per 1M tokens; output is free. It lets you cheaply carve out the “checkpoints” of agent proceed/stop decisions, model routing, and A
