What format should I paste usage in?

One line per model, in the form name = amount, for example gpt-4o = 142.50. Lines that do not parse are ignored. You can paste directly from a spreadsheet column with a little cleanup.

How is week-over-week change calculated?

For each model present in both weeks, the tool computes the percentage change from last week to this week. The overall change compares the two grand totals. New or removed models are noted as added or dropped.

What is per-head cost?

It divides this week's total spend by your team size, giving a simple per-person figure that is handy for budgeting conversations and for spotting when AI spend per engineer is creeping up.

Does this send my data anywhere?

No. All parsing and calculation happens in your browser. Nothing is uploaded, so you can safely paste internal spend figures.

Can I use a currency other than dollars?

Yes. Pick your currency symbol and the digest formats every figure with it. The tool does not convert between currencies, so enter all amounts in the same currency.

Weekly AI Cost Digest Generator

Weekly AI spend reviews are easier when the numbers come pre-formatted. Paste your per-model spend for this week and last, and this tool produces a clean Markdown digest — totals, week-over-week change, per-head cost — ready to drop into Slack or email.

How it works

You enter usage as simple model = amount lines for two weeks. The tool:

Parses each line into a model name and dollar amount, ignoring anything that does not match.
Totals each week and computes the overall week-over-week percentage change.
Diffs per model — change for models in both weeks, plus notes for models added or dropped.
Divides this week’s total by team size for a per-head figure.
Renders a copyable Markdown report.

All of it runs locally in your browser, so internal spend data never leaves your machine.

Example digest

For gpt-4o = 142.50 and claude-sonnet = 88.00 this week versus gpt-4o = 120 and claude-sonnet = 95 last week, team of 6:

## Weekly AI Cost Digest
Total this week: $230.50  (last week $215.00, +7.2%)
Per head: $38.42

- gpt-4o: $142.50  (+18.8%)
- claude-sonnet: $88.00  (-7.4%)

The +7.2% headline plus the per-model breakdown immediately shows where the increase came from.

Tips

Keep the same model names week to week so the diff lines up; renames show up as one model dropped and another added.
Track per-head cost over time — a steadily rising figure is an early signal to review usage patterns or switch models.
Pair with the LLM API Cost Calculator when you need to forecast next week rather than report last week.