5) All previous AI models were missing this crucial feedback loop.
Previously, models had never been trained to reason over tool calls; they were trained to reason over messages, but not over tool calls. Even Gemini-2.5 and o3-mini struggled with this. They would call the tools, see the outputs, but would still fail to correct their course accordingly.
This has always caused trouble in our AI agency, because our agents would often stop short and fail to complete their tasks - even when they were on the right track.