Lantern Candles order agent: cost assumptions

Made up for the course. Replace them with your own agent's numbers.

One run is the agent handling one order.
Runs a month today: 3,000
Runs a month at 10 times the volume: 30,000

Tokens in every run:
- 2,500 fixed tokens: the instructions and the price list, the same in every run
- 500 new tokens: the customer's order
- 300 tokens out: the agent's reply

Caching: 90% of runs read the 2,500 fixed tokens from the cache. The other 10% write them to the cache (5-minute cache).
Batch: 80% of runs can wait for a batch. The batch discount applies to everything in those runs, cache reads and writes included.

The five options to price:
1. Claude Opus 5.5, as is (no caching, no batch)
2. Claude Sonnet 5.5, as is
3. Claude Sonnet 5.5 with caching
4. Claude Sonnet 5.5 with caching and batch
5. Claude Haiku 5.5 with caching and batch
