Spend

Your events often stand for something you pay for: a call to an LLM, an SMS, a lookup in a paid API. The Spend tab turns those events into money, so you can see what you spent, when, and where it came from.

For example: $4 spent in the last 4 days across web and apps, with the iOS app 60% of it.

Set prices

Owners set prices in the Prices dialog on an environment's Spend tab. Before any price exists, the tab shows Add a price; afterwards, the Prices button beside the range opens the same dialog.

Each price table has one event, split by one or two of its properties, and one line per value:

• Event: the event you pay for, such as llm_call, or Any event to price log lines and events alike.
• Split by: the property that decides the cost, such as model. Use + add a second split for a second property, such as country for sms_sent. The lists show the properties the environment has seen; before there are any, type the name.
• Lines: pick a value, then type its cost per call. For llm_call split by model, that is large at 0.002 and small at 0.0004. Other value… lets you type a value the environment hasn't sent yet. + Add a line adds another.
• Currency: the small list next to Save prices. USD is the default.

The dialog opens with the busiest event, its first property and its busiest value filled in, so most tables only need a cost. A line missing its value or cost is marked when you save, and nothing changes until every line reads. Each value, or pair of values, has one line, and a table holds up to 500 lines.

Values match exactly. Calls whose values have no line are counted as "no price" and cost nothing; Add one under By price line opens the dialog with a new line for the busiest of them.

Members and viewers open the same dialog to read the prices, but can't change them.

Read the spend

The tab follows the range and deployment tabs like the dashboard:

• Spend for the range, with its change against the previous period of the same length.
• Calls: the priced calls in the range.
• Biggest driver: the deployment with the most spend on the All tab, or the price line with the most spend on a deployment's tab, with its share.
• Spend per day (per hour for Today) as bars.
• By deployment on the All tab: the top five deployments by spend and their share of the total.
• By price line: each line's values, calls, spend and share, and how many calls had no price.

How it works next to the Prices button plays a short demo of the steps above.

Spend is exact: each combination's deduplicated count times its unit cost, added up without rounding. The same numbers are available to AI assistants through the spend_summary tool.