AI API Cost Calculator

To estimate your AI API costs:

1. Select the AI model you plan to use from the dropdown.
2. Enter the average number of input tokens (prompt length) per request.
3. Enter the average number of output tokens (completion length) per request.
4. Enter the number of API requests you expect to make per day.

The calculator will show your cost per request, daily cost, monthly cost, and annual cost. Use this to compare models and optimize your budget.

AI API cost calculators help developers and businesses estimate the expense of integrating large language models into their applications. Major providers like OpenAI, Anthropic, and Google charge based on token usage, with prices varying significantly between models of different sizes and capabilities.

Understanding your projected costs before building is critical for budgeting, selecting the right model for your use case, and designing efficient prompts. Small differences in per-request cost can compound into substantial amounts at scale.

The cost calculation is straightforward:

• Input Cost = (Input Tokens / 1,000,000) × Input Price per Million Tokens
• Output Cost = (Output Tokens / 1,000,000) × Output Price per Million Tokens
• Cost per Request = Input Cost + Output Cost
• Daily Cost = Cost per Request × Requests per Day

Example: Using GPT-4o with 500 input tokens and 300 output tokens at 100 requests/day: Input cost = (500/1M) × $2.50 = $0.00125. Output cost = (300/1M) × $10 = $0.003. Cost per request = $0.00425. Daily = $0.425. Monthly = $12.75. Annual = $155.13.