OpenAI API Cost Calculator – Free Online Tool
Estimate OpenAI API token spend for GPT-5.5, GPT-5.4, and GPT-5.4 mini with cached input support and batch discount simulation.
Free OpenAI API Cost Calculator for GPT Models
The OpenAI API Cost Calculator helps you estimate token spend before launching features in production. Choose a model, enter token counts, and get per-request, daily, monthly, and yearly projections in seconds.
Supports GPT-5.5, GPT-5.4, and GPT-5.4 mini
Use built-in pricing presets for GPT-5.5, GPT-5.4, and GPT-5.4 mini. The calculator includes separate input, cached input, and output token rates so your estimate better matches real usage patterns.
Standard vs Batch Cost Scenarios
Pricing strategy can change total spend quickly. Toggle between standard and batch mode to compare budget outcomes and understand potential savings when asynchronous batch workflows fit your product.
How to Estimate OpenAI Token Cost
Step 1: Select your model and pricing mode. Step 2: Enter average input tokens, cached input tokens, output tokens, and daily request volume. Step 3: Review the cost forecast and copy a summary for planning docs or sprint decisions.
Built for Founders, Product Teams, and Developers
Use this tool for feature planning, pricing strategy, margin analysis, and launch readiness. It is especially useful for AI copilots, customer support assistants, content tools, coding assistants, and internal workflows.
Frequently Asked Questions
Everything you need to know about the OpenAI API Cost Calculator.
Is this OpenAI cost calculator free?
Yes. It is free with no signup.
Does it use official OpenAI pricing numbers?
It uses listed model rates configured in the tool. Always verify final rates on the official OpenAI pricing page before committing budgets.
What is cached input?
Cached input refers to prompt tokens billed at a lower cached-input rate when eligible by the model and API behavior.
Does batch mode always reduce cost?
Batch pricing can reduce token cost for supported workflows, but it is asynchronous and not suitable for every real-time product path.
Is this a billing statement?
No. It is an estimate for planning and forecasting. Actual billing depends on your exact API usage and pricing terms.
Is token data uploaded?
No. All math runs locally in your browser.