How Much Does Agent Memory Cost?
Agent memory is context per turn, vector storage, and persistence — a recurring cost that grows with every session.
Where memory costs come from
Context: tokens re-sent per turn (the biggest line).
Vector storage: indexed memories.
Persistence: databases and state.
Why it grows
Long sessions re-send growing contexts.
Memories accumulate across sessions.
What it really costs
Context tokens × turns + storage. Caching and trimming cut the context line; retention policies cut storage.
Where the money goes
| Memory bucket | Lever |
|---|---|
| Context tokens | Caching + trimming |
| Vector storage | Retention policies |
| Persistence | Right-size state |
FAQ
Is memory the hidden cost?
It's the most overlooked — context re-sends compound every turn.
Does the firewall cover memory spend?
Yes — any merchant, including memory and vector providers.
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