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Add support for cached tokens in cost calculation #222

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Add support for cached tokens in cost calculation #222

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12 changes: 9 additions & 3 deletions src/utils.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -409,23 +409,29 @@ cost1 = call_cost(msg1, "model1")
# Using custom token costs
cost2 = call_cost(10, 20, "model3"; cost_of_token_prompt = 0.08, cost_of_token_generation = 0.12)
# cost2 = 10 * 0.08 + 20 * 0.12 = 3.2

# Using cached tokens
cost3 = call_cost(10, 20, "model3"; cached_tokens = 5, cost_of_token_prompt = 0.08, cost_of_token_generation = 0.12)
# cost3 = (10 - 5) * 0.08 + 20 * 0.12 = 2.8
```
"""
function call_cost(prompt_tokens::Int, completion_tokens::Int, model::String;
cached_tokens::Int = 0,
cost_of_token_prompt::Number = get(MODEL_REGISTRY,
model,
(; cost_of_token_prompt = 0.0)).cost_of_token_prompt,
cost_of_token_generation::Number = get(MODEL_REGISTRY, model,
(; cost_of_token_generation = 0.0)).cost_of_token_generation)
cost = prompt_tokens * cost_of_token_prompt +
cost = (prompt_tokens - cached_tokens) * cost_of_token_prompt +
completion_tokens * cost_of_token_generation
return cost
end
function call_cost(msg, model::String)
cached_tokens = get(msg.extras, :cached_tokens, 0)
cost = if !isnothing(msg.cost)
msg.cost
else
call_cost(msg.tokens[1], msg.tokens[2], model)
call_cost(msg.tokens[1], msg.tokens[2], model; cached_tokens = cached_tokens)
end
return cost
end
Expand Down Expand Up @@ -665,4 +671,4 @@ Returns indices of unique items in a vector `inputs`. Access the unique values a
"""
function unique_permutation(inputs::AbstractVector)
return unique(i -> inputs[i], eachindex(inputs))
end
end
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