Try this: open ChatGPT or Claude and type: “You are a supplier who wants a 9% price increase. I am the buyer.”
It works for about four messages. Then you mention a second source, and the supplier drops to 4%. You push once more, and he accepts your terms.
That isn’t a bug
General assistants are built to be helpful. A real supplier with a full order book is not.
Sales has the same problem: the “your competitor is 12% cheaper” buyer is ready to sign two sentences later.
What a generic chatbot doesn’t know
A generic chatbot doesn’t know your case, your volumes or your walk-away point. Its feedback changes with every chat, and most procurement teams would rather not see their cost breakdowns pasted into it.
A counterpart that holds its position
With Simpanion, buyers and sellers practice your own cases against your own criteria. The counterpart holds its position, a case can be lost, and the feedback quotes the exact sentence where the conversation turned.
Simpanion — train the human edge. AI role-play for your team. Built and hosted in Germany.