LLM API Calculator
LLM Cost Calculator
Calculate the cost of using large language models based on your request volume and token usage. Compare AI model pricing and estimate daily, monthly, and yearly LLM API expenses.
Calculate Your LLM API Cost
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What Is an LLM Cost Calculator?
An LLM Cost Calculator helps estimate how much an application may spend on large language model APIs. The calculation is based mainly on the number of requests and the amount of input and output tokens used by each request.
Different AI models have different prices for input and output tokens. Using an LLM cost calculator makes it easier to compare models and estimate expected API spending before deploying an application.
How LLM API Costs Are Calculated
Most LLM providers charge separately for input and output tokens. Prices are commonly listed per one million tokens.
Cost = (Input Tokens ÷ 1,000,000 × Input Price)
+ (Output Tokens ÷ 1,000,000 × Output Price)
Your daily cost can then be estimated by multiplying the cost of one request by the number of requests per day. Monthly and yearly estimates can be calculated from the daily cost.
What Affects LLM API Cost?
Number of API Requests
More requests generally mean higher API costs. Estimating your expected requests per day is one of the first steps when planning an AI application budget.
Input Tokens
Input tokens include prompts, instructions, conversation history, and other context sent to the model. Larger inputs increase the cost of each request.
Output Tokens
Output tokens are generated by the model. Many providers charge a different price for output tokens, so longer responses can significantly affect total API spending.
Model Pricing
Different models can have very different input and output prices. Comparing models with the same token usage can help identify a more cost-effective option.
Compare LLM API Pricing
Compare pricing and calculate API costs for popular models from OpenAI, Anthropic, and Google Gemini.
Plan Your LLM API Budget
If you already know how much you want to spend each month, you can work backwards from your budget and estimate how many API requests your application can support.
AI Budget Calculator
Choose a model, set your monthly budget, and estimate the number of requests you can make based on your expected input and output token usage.
Calculate your AI API budget →LLM Cost Calculator FAQ
What is an LLM Cost Calculator?
An LLM Cost Calculator estimates the cost of using large language model APIs based on requests and token usage.
How is LLM API cost calculated?
LLM API cost is calculated using input and output token usage together with the model's price per one million tokens.
What affects the cost of an LLM API?
The main factors are the number of requests, input tokens, output tokens, and the pricing of the selected AI model.
Can I estimate monthly LLM costs?
Yes. The calculator can estimate daily, monthly, and yearly API expenses based on your expected usage.
Can I calculate how many requests fit my budget?
Yes. Use the AI Budget Calculator to estimate how many requests you can make with a fixed monthly budget.