INTERACTIVE · COST CALCULATOR

The cost of the next message, dialed in

Adjust a session and watch the warm-cache and cold-cache costs diverge. Every lever matches a helper.

Cumulative input size of this conversation. Helper #02 (Just One More Turn) warns when this crosses the rot zone.

Drag past 5 min to watch the cost flip from warm to cold. Helper #01 (Idle Tax) catches this moment in real sessions.

Model & effort

Opus 4.7's new default is xhigh — more reasoning tokens per turn. Helper #06 (Effort Control) pins you to high.

Turns in this scenario

"Just one more turn" is rarely just one. Helper #05 (Watching Cost) catches tool output that balloons context.

Your next message
$0.63
vs $0.05 if cache were warm
At 8 min idle, your cache has expired. Your next message takes the cold path.
Cost per turn and total — warm cache vs cold cache Bar chart comparing the cost of a warm-cache turn to a cold-cache turn at current settings. A live multiplier reports how many times more the cold path costs. Warm cache $0.05 Cold cache $0.63
Warm-cache turn
$0.05
Cache hit: input prefix billed at 0.1× base.
Cold-cache turn
$0.63
Cache write: full prefix billed at 1.25× base.
Scenario total
$5.03
Sum across the selected turn count at current settings.
With helpers (save + resume)
$0.45
Resumes in a fresh session so cold writes only happen once. The rest stay warm.
Cold cache costs 12.5× more than warm cache right now.