AI Cost Impact — find out what your AI bill becomes, before the invoice does

Tell it what you use. It tells you what your monthly cost is now, what vendors have already announced it will become, and the difference.

Example: an Anthropic API user on Sonnet 5 today.

{ "mode": "impact", "usage": [
  { "item_id": "anthropic.api.sonnet-5.input",  "quantity": 50 },
  { "item_id": "anthropic.api.sonnet-5.output", "quantity": 10 }
]}

monthly_cost_by_currency                  { "USD": 200 }
monthly_cost_after_announced_by_currency  { "USD": 300 }
announced_delta_by_currency               { "USD": 100 }
increase_pct_by_currency                  { "USD": 50 }

2026-09-01  Sonnet 5 input   $2 → $3    "introductory through August 31, 2026; $3 standard thereafter"
2026-09-01  Sonnet 5 output  $10 → $15  "introductory; $15 standard thereafter"

That is a 50% cost increase already written on the vendor's own pricing page, effective in weeks. It is the kind of thing you want to find before it lands on an invoice.

quantity means seats for per-seat plans, and millions of tokens per month for API metrics.

Why this can tell you that

Because it also keeps the history. Today's price is something anyone can look up. When a price changed, and what it changed from, only exists if somebody was watching before it moved.

This Actor ships a daily first-party observation ledger of AI service pricing and limits, started 2026-08-08, and every mode is served from it.

Covered

Anthropic (Claude plans + API), OpenAI API, Google Gemini API, Google AI plans, xAI Grok API, GitHub Copilot, Cursor, Replit, Microsoft 365 Copilot (JPY), Notion (JPY), ElevenLabs — 188 tracked items across 12 sources.

What it refuses to do

An estimate that quietly rounds off inconvenient facts is worse than no estimate. So:

1. It never adds currencies together. USD and JPY come back as separate totals. No invented exchange rate.
2. It never counts included credits as a charge. "$15 of monthly credits included" is a benefit, not a bill. Feed it one and it returns NOT_A_COST instead of inflating your total.
3. It never treats an unpublished price as zero. If the vendor doesn't show a number, you get PRICE_NOT_SHOWN and it stays out of the total.
4. It never presents an announcement as a fact. Upcoming changes are ANNOUNCED_NOT_YET_OBSERVED until an observation on or after the effective date confirms them.
5. It tells you what it left out: tax, overage and minimums, negotiated discounts, FX, free-tier consumption.

Every line carries the verbatim string from the vendor's page and the source URL, so you can check it yourself.

What it is not

• Not a recommendation engine. It won't tell you which service is cheaper for you.
• Not an explanation. It reports that a value moved, not why, what it means, or where it goes next.
• Not a back-fill. There is no data before the ledger started, and no change in an unobserved window is not evidence that nothing changed.
• Not an invoice. It is list price × declared quantity.

Sources are public, official vendor pages, read-only.