framework · 03 controls

THE OPEN TAB

what an agent runs up before anyone is looking

A human authorizes, sees, and owns a spend in the same instant. An autonomous agent pulls those three apart. Putting them back is the whole discipline — and it's what lets you keep the leverage without the surprise bill.

◇ One task. Four ways it spends.

A single agent request fans out into four cost streams — each accruing at a different rate. Watch the tab run up.

Tab
$0/mo
Re-reading context
$0
Tool definitions
$0
Model calls
$0
Exploration & file reads
$0
Retries & loops
$0
Cut the streams

Each color is a different way the tab grows. Three of the four are recoverable. One isn't.

The three controls

01

The Limit

A ceiling it cannot cross.

02

The Meter

See the spend before the bill.

03

The Owner

A name on it before it acts.

See your own tab

Configure the scenario in a sentence, or switch to your real monthly spend. The statement itemizes the tab; applying a credit recomputes what's due. The math is shown, not hidden.

Configure

A team of running agents on , usage.

The TabMAY 2026
account · 12 agents · Opus 4.8 · multi-tool
Re-reading context$4,391
Tool definitions$4,704
Model calls$3,136
Exploration & file reads$2,195
Retries & loops$1,255
Subtotal$0
Tab due
$0/mo
per task ~$3.96 · 475M tokens/mo · 0% recoverable
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