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fix(helpers): cost of prompt and completion tokens for OpenAI models #618

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merged 2 commits into from
Oct 5, 2023
Merged

fix(helpers): cost of prompt and completion tokens for OpenAI models #618

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ebb91e3
fix(helpers): separate cost of prompt and completion
mspronesti Oct 4, 2023
f1bf92d
chore: fix ruff lint
mspronesti Oct 4, 2023
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54 changes: 48 additions & 6 deletions pandasai/helpers/openai_info.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,30 +10,66 @@
"gpt-4-0613": 0.03,
"gpt-4-32k": 0.06,
"gpt-4-32k-0613": 0.06,
# GPT-4 output
"gpt-4-completion": 0.06,
"gpt-4-0613-completion": 0.06,
"gpt-4-32k-completion": 0.12,
"gpt-4-32k-0613-completion": 0.12,
# GPT-3.5 input
"gpt-3.5-turbo": 0.0015,
"gpt-3.5-turbo-instruct": 0.0015,
"gpt-3.5-turbo-0613": 0.0015,
"gpt-3.5-turbo-instruct": 0.0015,
"gpt-3.5-turbo-16k": 0.003,
"gpt-3.5-turbo-16k-0613": 0.003,
# GPT-3.5 output
"gpt-3.5-turbo-completion": 0.002,
"gpt-3.5-turbo-0613-completion": 0.002,
"gpt-3.5-turbo-instruct-completion": 0.002,
"gpt-3.5-turbo-16k-completion": 0.004,
"gpt-3.5-turbo-16k-0613-completion": 0.004,
# Azure GPT-35 input
"gpt-35-turbo": 0.0015, # Azure OpenAI version of ChatGPT
"gpt-35-turbo-0613": 0.0015,
"gpt-35-turbo-instruct": 0.0015,
"gpt-35-turbo-16k": 0.003,
"gpt-35-turbo-16k-0613": 0.003,
# Azure GPT-35 output
"gpt-35-turbo-completion": 0.002, # Azure OpenAI version of ChatGPT
"gpt-35-turbo-0613-completion": 0.002,
"gpt-35-turbo-instruct-completion": 0.002,
"gpt-35-turbo-16k-completion": 0.004,
"gpt-35-turbo-16k-0613-completion": 0.004,
# Others
"gpt-35-turbo": 0.002, # Azure OpenAI version of ChatGPT
"text-davinci-003": 0.02,
}


def get_openai_token_cost_for_model(
model_name: str,
num_tokens: int,
model_name: str,
num_tokens: int,
is_completion: bool = False,
) -> float:
"""
Get the cost in USD for a given model and number of tokens.
Args:
model_name (str): Name of the model
num_tokens (int): Number of tokens.
is_completion: Whether `num_tokens` refers to completion tokens or not.
Defaults to False.
Returns:
float: Cost in USD.
"""
model_name = model_name.lower()
if is_completion and (
model_name.startswith("gpt-4")
or model_name.startswith("gpt-3.5")
or model_name.startswith("gpt-35")
):
# The cost of completion token is different from
# the cost of prompt tokens.
model_name = model_name + "-completion"
if model_name not in MODEL_COST_PER_1K_TOKENS:
raise ValueError(
f"Unknown model: {model_name}. Please provide a valid OpenAI model name."
Expand Down Expand Up @@ -63,10 +99,16 @@ def __call__(self, response: OpenAIObject) -> None:
usage = response.usage
if "total_tokens" not in usage:
return None

model_name = response.model
if model_name in MODEL_COST_PER_1K_TOKENS:
total_cost = get_openai_token_cost_for_model(model_name, usage.total_tokens)
self.total_cost += total_cost
prompt_cost = get_openai_token_cost_for_model(
model_name, usage.prompt_tokens
)
completion_cost = get_openai_token_cost_for_model(
model_name, usage.completion_tokens, is_completion=True
)
self.total_cost += prompt_cost + completion_cost

self.total_tokens += usage.total_tokens
self.prompt_tokens += usage.prompt_tokens
Expand Down