Mimir.Pricing (Mimir v0.1.0)

Token usage -> integer microdollar cost.

Lookup order for a "provider:model_id" key:

Config table (:mimir, :pricing) keyed "provider:model_id" — wins when present.
Vendored LiteLLM pricing DB fallback (loaded once, memoized in :persistent_term):
- try bare model_id key in the DB
- then "<provider>/<model_id>"
Miss → zero (never crashes metering).

Price table (:mimir, :pricing) values are %{input: µ$_per_million, output: µ$_per_million}. The vendored DB stores the same shape after converting LiteLLM's USD/token floats at load time: round(cost * 1.0e12) → integer µ$/M tokens. Integer math only on the hot path.

Refresh the vendored DB with mix mimir.pricing.refresh. The :mimir, :pricing_db_path config key overrides the default priv path (useful in tests).

Summary

Types

usage()

Functions

cost_microdollars(model, usage)

Cost of usage against model's rate, in integer microdollars. Looks up the rate via the lookup order documented above; an unpriced model costs 0.

Types

usage()

@type usage() :: %{
  optional(:input_tokens) => non_neg_integer(),
  optional(:output_tokens) => non_neg_integer()
}

Functions

cost_microdollars(model, usage)

@spec cost_microdollars(String.t(), usage()) :: non_neg_integer()

Cost of usage against model's rate, in integer microdollars. Looks up the rate via the lookup order documented above; an unpriced model costs 0.