OpenAI
OpenAI API Cost Calculator
Calculate your estimated OpenAI API costs based on requests, input tokens, and output tokens. Compare GPT model pricing and estimate your daily, monthly, and yearly API expenses.
OpenAI Models
Compare OpenAI model pricing and choose a model to calculate your expected API costs.
How to Calculate OpenAI API Costs
OpenAI API costs depend on the amount of input and output tokens processed by your application. Different GPT models can have different prices for those token types.
To estimate your total spending, enter your expected number of daily requests together with the average number of input and output tokens per request.
Cost = (Input Tokens ÷ 1,000,000 × Input Price)
+ (Output Tokens ÷ 1,000,000 × Output Price)
What Affects OpenAI API Cost?
Number of Requests
The number of API requests your application sends has a direct effect on total spending. Higher request volume generally produces higher API costs.
Input Tokens
Input tokens include prompts, instructions, conversation history, and other context sent to the selected GPT model. Larger inputs increase the cost of each request.
Output Tokens
Output tokens are generated by the model. Because output pricing can differ from input pricing, longer responses can increase the total cost of an API request.
Model Selection
OpenAI models have different input and output prices. Comparing models with the same token usage can help you find a suitable balance between capability and cost.
OpenAI API Cost Examples
Your actual OpenAI API bill depends on usage. Common workloads include chat applications, AI assistants, content generation, automation tools, and SaaS products.
Small AI App
A small application with a limited number of daily users may have relatively low API usage and costs.
SaaS Application
A growing SaaS product can generate thousands of API requests per day, making token efficiency and model selection increasingly important.
Production Workload
High-volume production applications should estimate request volume and average token usage before setting an API budget.
Plan Your OpenAI API Budget
If you already have a monthly spending limit, you can estimate how many OpenAI API requests your budget could support based on your expected input and output token usage.
Open AI Budget CalculatorFrequently Asked Questions
How much does the OpenAI API cost?
OpenAI API costs depend on the model you use and the number of input and output tokens processed by your application.
How can I estimate my OpenAI API bill?
Enter your expected daily requests and average input and output tokens into our calculator to estimate daily, monthly, and yearly costs.
Which OpenAI model should I use?
The right model depends on your application's requirements, expected token usage, and budget. Comparing model pricing can help you evaluate different options.
Can I calculate how many OpenAI requests fit my budget?
Yes. Use the AI Budget Calculator to estimate the number of requests you can make with a fixed monthly budget.
Is the OpenAI cost calculator free?
Yes. The calculator is free to use and does not require an account.