Three habits that keep your Claude usage low while getting the most out of Armbrain. They do not change Armbrain features. They stop unnecessary token spending.
Why This Matters
Armbrain works with your AI, so your plan covers the cost of talking to it. Heavy token use hits plan limits faster. Extra usage settings can increase your bill. These three habits keep that under control.
1. Start a New Chat for Each Task
This is the biggest one. Armbrain does not need conversation continuity to remember things. Everything it knows lives in the client's client mind, not in the chat history. So a fresh chat starts with the same full memory as a long one.
Long chats, on the other hand, get expensive fast. Each message re-sends the full chat history. An hour-long chat costs far more for the same answer.
The habit: finished prepping for the Acme call? Start a new chat before you move on to the next client. You lose nothing -- ask "What do we know about [next client]?" and Armbrain picks up right where it should.
| Compared | New chat per task | One long chat all day |
|---|---|---|
| Memory available | Everything | Everything (same) |
| Tokens per message | Low and steady | Climbs all day |
| Risk of hitting your limit | Low | High |
2. Use Sonnet for Daily Work, Opus for Strategy
Claude lets you pick which model answers. The two you will use:
- Sonnet -- fast, capable, and much cheaper. Use it for almost everything: meeting prep, storing memories, searching, drafting follow-ups, daily briefings.
- Opus -- the most powerful (and most expensive) model. Save it for high-level strategy work: quarterly planning, complex positioning calls, deep document synthesis where the extra reasoning is worth the cost.
Most Armbrain work is retrieval and drafting, which Sonnet handles beautifully. Opus burns through plan limits quickly with no benefit on routine tasks.
The habit: leave Claude on Sonnet by default. Switch up to Opus only when you are doing genuine strategic thinking, then switch back.
3. Check Your "Extra Usage" Setting to Avoid Extra Costs
This one is about actual charges, not just speed. Read it carefully.
Claude has a setting variously called "Extra usage" or overflow billing. When it is turned on, Claude does not stop you when you reach your monthly plan limit -- it keeps going and charges you per token for everything past the limit. Those charges can add up quietly, especially if you have long chats running (see tip #1).
If you would rather hit your plan limit and stop -- with no surprise charges -- you need to turn this off.
The habit:
- Open Claude's account or billing settings (claude.ai > Settings, or the equivalent in Claude Desktop)
- Find the "Extra usage" / overflow / pay-as-you-go option
- Turn it off unless you specifically want to pay for usage beyond your plan
Only leave it on if you have made a deliberate decision to accept per-token charges past your plan limit. Off is the safer default. Your bill stays at your plan cost.
Armbrain never bills Claude usage and cannot change this Claude setting. We are flagging it because it is easy to leave on by accident and only notice when the bill arrives.
Quick Reference
| Habit | Why | Effort |
|---|---|---|
| New chat per task | Long chats re-send everything and cost more each message | 1 second |
| Sonnet by default, Opus for strategy | Sonnet does most work at a fraction of the cost | 1 click |
| Turn off "Extra usage" | Stops surprise per-token charges past your plan limit | One-time, in Claude settings |
Do these three and your Claude usage stays predictable -- no surprises, no wasted tokens, same full Armbrain memory every time.