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Budget Manager

Don't want to get crazy bills because either while you're calling LLM APIs or while your users are calling them? use this.

LiteLLM exposes:

litellm.max_budget: a global variable you can use to set the max budget (in USD) across all your litellm calls. If this budget is exceeded, it will raise a BudgetExceededError
BudgetManager: A class to help set budgets per user. BudgetManager creates a dictionary to manage the user budgets, where the key is user and the object is their current cost + model-specific costs.

quick start

import litellm, os 
from litellm import completion

# set env variable 
os.environ["OPENAI_API_KEY"] = "your-api-key"

litellm.max_budget = 0.001 # sets a max budget of $0.001

messages = [{"role": "user", "content": "Hey, how's it going"}]
completion(model="gpt-4", messages=messages)
print(litellm._current_cost)
completion(model="gpt-4", messages=messages)

User-based rate limiting

from litellm import BudgetManager, completion 

budget_manager = BudgetManager(project_name="test_project")

user = "1234"

# create a budget if new user user
if not budget_manager.is_valid_user(user):
    budget_manager.create_budget(total_budget=10, user=user)

# check if a given call can be made
if budget_manager.get_current_cost(user=user) <= budget_manager.get_total_budget(user):
    response = completion(model="gpt-3.5-turbo", messages=[{"role": "user", "content": "Hey, how's it going?"}])
    budget_manager.update_cost(completion_obj=response, user=user)
else:
    response = "Sorry - no budget!"

Implementation Code

use with Text Input / Output

Update cost by just passing in the text input / output and model name.

from litellm import BudgetManager

budget_manager = BudgetManager(project_name="test_project")
user = "12345"
budget_manager.create_budget(total_budget=10, user=user, duration="daily")

input_text = "hello world"
output_text = "it's a sunny day in san francisco"
model = "gpt-3.5-turbo"

budget_manager.update_cost(user=user, model=model, input_text=input_text, output_text=output_text) # 👈
print(budget_manager.get_current_cost(user))

advanced usage

In production, we will need to

store user budgets in a database
reset user budgets based on a set duration

LiteLLM API

The LiteLLM API provides both. It stores the user object in a hosted db, and runs a cron job daily to reset user-budgets based on the set duration (e.g. reset budget daily/weekly/monthly/etc.).

Usage

budget_manager = BudgetManager(project_name="<my-unique-project>", client_type="hosted")

Complete Code

from litellm import BudgetManager, completion 

budget_manager = BudgetManager(project_name="<my-unique-project>", client_type="hosted")

user = "1234"

# create a budget if new user user
if not budget_manager.is_valid_user(user):
    budget_manager.create_budget(total_budget=10, user=user, duration="monthly") # 👈 duration = 'daily'/'weekly'/'monthly'/'yearly'

# check if a given call can be made
if budget_manager.get_current_cost(user=user) <= budget_manager.get_total_budget(user):
    response = completion(model="gpt-3.5-turbo", messages=[{"role": "user", "content": "Hey, how's it going?"}])
    budget_manager.update_cost(completion_obj=response, user=user)
else:
    response = "Sorry - no budget!"

Self-hosted

To use your own db, set the BudgetManager client type to hosted and set the api_base.

Your api is expected to expose /get_budget and /set_budget endpoints. See code for details

Usage

budget_manager = BudgetManager(project_name="<my-unique-project>", client_type="hosted", api_base="your_custom_api")

Complete Code

from litellm import BudgetManager, completion 

budget_manager = BudgetManager(project_name="<my-unique-project>", client_type="hosted", api_base="your_custom_api")

user = "1234"

# create a budget if new user user
if not budget_manager.is_valid_user(user):
    budget_manager.create_budget(total_budget=10, user=user, duration="monthly") # 👈 duration = 'daily'/'weekly'/'monthly'/'yearly'

# check if a given call can be made
if budget_manager.get_current_cost(user=user) <= budget_manager.get_total_budget(user):
    response = completion(model="gpt-3.5-turbo", messages=[{"role": "user", "content": "Hey, how's it going?"}])
    budget_manager.update_cost(completion_obj=response, user=user)
else:
    response = "Sorry - no budget!"

Budget Manager Class

The BudgetManager class is used to manage budgets for different users. It provides various functions to create, update, and retrieve budget information.

Below is a list of public functions exposed by the Budget Manager class and their input/outputs.

init

def __init__(self, project_name: str, client_type: str = "local", api_base: Optional[str] = None)

project_name (str): The name of the project.
client_type (str): The client type ("local" or "hosted"). Defaults to "local".
api_base (Optional[str]): The base URL of the API. Defaults to None.

create_budget

def create_budget(self, total_budget: float, user: str, duration: Literal["daily", "weekly", "monthly", "yearly"], created_at: float = time.time())

Creates a budget for a user.

total_budget (float): The total budget of the user.
user (str): The user id.
duration (Literal["daily", "weekly", "monthly", "yearly"]): The budget duration.
created_at (float): The creation time. Default is the current time.

projected_cost

def projected_cost(self, model: str, messages: list, user: str)

Computes the projected cost for a session.

model (str): The name of the model.
messages (list): The list of messages.
user (str): The user id.

get_total_budget

def get_total_budget(self, user: str)

Returns the total budget of a user.

user (str): user id.

update_cost

def update_cost(self, completion_obj: ModelResponse, user: str)

Updates the user's cost.

completion_obj (ModelResponse): The completion object received from the model.
user (str): The user id.

get_current_cost

def get_current_cost(self, user: str)

Returns the current cost of a user.

user (str): The user id.

get_model_cost

def get_model_cost(self, user: str)

Returns the model cost of a user.

user (str): The user id.

is_valid_user

def is_valid_user(self, user: str) -> bool

Checks if a user is valid.

user (str): The user id.

get_users

def get_users(self)

Returns a list of all users.

reset_cost

def reset_cost(self, user: str)

Resets the cost of a user.

user (str): The user id.

reset_on_duration

def reset_on_duration(self, user: str)

Resets the cost of a user based on the duration.

user (str): The user id.

update_budget_all_users

def update_budget_all_users(self)

Updates the budget for all users.

save_data

def save_data(self)

Stores the user dictionary.