What it does

The calculator runs in the browser on the Rynler website. You enter input tokens per run, output tokens per run and runs per day. You then enter input and output rates in USD per 1M tokens. You can type the rates from any provider's rate card or pick a Rynler model. The calculator multiplies input tokens by the input rate and output tokens by the output rate. It adds the two amounts together and divides the sum by 1,000,000. It then multiplies the result by runs per day and by 30 for the monthly projection. The page shows the cost per run, per day and per 30 days. It also shows the input and output share of the cost. Estimates exclude taxes, platform fees, cache rules, minimum purchases, failures and retries.

Capabilities

Accepts input rates and output rates in USD per 1M tokens.
Lets you type rates from any provider's rate card or pick a Rynler model.
Shows the input and output share of the cost.
Lists what the estimate excludes: taxes, platform fees, cache-specific billing rules, minimum purchases, failed requests and retries.
Links to a guide on estimating LLM API costs, from measuring one representative run to reconciling usage after launch.

When to use it

You need a monthly projection from the tokens used per run and the number of runs per day.
You want to re-rate a workload with current per-million rates before committing to it.
You want to check an estimate against a real bill using the provider's usage records.