LIVE COSTS
Task totals update as Codex writes new usage locally.
LOCAL TELEMETRY / PRIVATE BY DEFAULT
KNOW WHAT
EVERY TURN
COSTS.
HarnessCost sits quietly in your menu bar and turns Codex usage into a clear, honest number—before and after you send.
LIVE / TASK COST RECORDING
$0.1842 CAD
FRESH INPUT$0.0318
CACHED INPUT$0.0041
OUTPUT$0.1483
SCROLL TO EXPLORE
01 / THE SIGNAL
NO GUESSWORK.
JUST THE RECEIPT.
See the model, project, turn, tokens, cache behavior, and estimated API-equivalent cost in one restrained view. Your transcripts stay on your Mac.
02 / BUILT FOR THE LOOP
FROM PROMPT
TO PRICE.
PREFLIGHT
Estimate the next input before you commit to a turn.
PROJECT VIEW
Group threads by project so spend has context.
QUIET CONTROL
Optional approval. Fail-open behavior. No interruptions when you don’t want them.
03 / ACCESS
ONE PLAN.
NO SURPRISES.
HARNESSCOST / DIRECT DOWNLOAD
MAKE EVERY
TURN COUNT.
A small, native Mac app for people who want to understand their AI work without sending their work anywhere.
GET HARNESSCOST ↗