Why Your OpenClaw Agent Gets Slower and More Expensive Over Time

Introduction OpenClaw feels fast in the first week. You send a message, the agent responds, and the workflow makes sense. Then gradually, without any obvious change, responses take a little longer, and the API bill at the end of the month is higher than it was two weeks ago, with no single thing you can point to as the cause. That is not a coincidence, and it is not bad luck. It is what happens when three separate problems compound on each other quietly, over time, without any of them being obvious on its own. Context bloating, static content being reprocessed on every call, and every request hitting the same model regardless of what it actually needs, these are not dramatic failures. They are the kind of inefficiencies that feel invisible until they are not, and by the time the invoice makes them obvious, they have been running for weeks. In this post, we will break down what is driving each of them and why routing, not prompt tuning or model switching, is the fix that addresses all t