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OpenAI Cost Calculator

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Estimate GPT-4o / GPT-4.1 API costs from token usage.

ModelGPT-4o
Input cost$2.50
Output cost$10.00
Cost per request$0.01
Total cost$12.50
Est. monthly (×30)$375.00

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Disclaimer: Estimates for informational purposes only. Pricing and performance figures come from a community-maintained feed (LiteLLM) with bundled fallbacks and may be outdated or inaccurate. Always confirm current prices on the official OpenAI, Anthropic, Google, or cloud-provider pricing pages before making decisions. ToolsHub is not affiliated with these companies; product names are trademarks of their owners. Token counts for non-OpenAI models are approximate.

About the OpenAI Cost Calculator

OpenAI bills API usage per token, split between cheaper input and pricier output. This free OpenAI cost calculator estimates what GPT-4o, GPT-4.1, o3, o4-mini and other models will cost from your input and output token counts and request volume, so you can budget before you build.

It runs in your browser using bundled pricing data.

How to estimate OpenAI API cost

  • Pick the model you plan to use.
  • Enter average input and output tokens per request, and requests per period.
  • See the estimated cost per request and total.

How OpenAI pricing works

OpenAI charges per token and prices input (your prompt) separately from output (the model's reply), with output usually costing more. Your bill is the input tokens times their rate plus the output tokens times theirs, multiplied by your request volume. That's why a long system prompt resent on every call, or unnecessarily long responses, can quietly dominate costs.

Frequently asked questions

How is OpenAI API pricing calculated?

You pay per token, with separate rates for input (your prompt) and output (the model's reply). Total cost is tokens times the per-token rate for each, summed across requests.

What's the difference between input and output tokens?

Input tokens are what you send in the prompt; output tokens are what the model generates. Output is usually priced higher, so long responses cost more.

Are these prices exact?

They're estimates from bundled reference data and may lag official changes. Always confirm current rates on OpenAI's pricing page before committing.

Are these prices exact?

They're estimates from bundled reference data and can lag official changes. Always confirm the current rates on OpenAI's pricing page before committing budget.

Related searches

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