ChatGPT Prompt Cost Calculator
ChatGPT Cost Tool
ChatGPT Prompt Cost Calculator
Estimate prompt token usage, cost per request, monthly API cost, and possible savings from shorter prompts. Use this for ChatGPT-style apps, AI tools, content workflows, and API budget planning.
Prompt input
Paste a prompt to estimate tokens. You can also override the input token count manually.
1 USD = 1 USD
Source: Fallback estimate
Prompt cost results
These estimates use the selected model price per 1 million tokens.
Cost per prompt
$0.00362
Input + cached input + output cost
Monthly API cost
$10.8585
100 requests/day × 30 days
Monthly cost in USD
$10.86
Rate: 1 USD per $1
Yearly API cost
$130
Monthly cost × 12
Yearly cost in USD
$130.30
Yearly cost converted to selected local currency
Estimated input tokens
26
Estimated from prompt text
Prompt characters
128
19 words detected
Monthly token volume
2,478,000
Input + cached input + output tokens
Prompt savings simulator
See how much you could save by shortening repeated prompt text while keeping the same output size.
Reduced input tokens
21
20% shorter input prompt
Monthly savings
$0.0117
Estimated monthly cost reduction
Monthly savings in USD
$0.01
Converted to selected local currency
Yearly savings
$0.1404
Monthly savings × 12
Yearly savings in USD
$0.14
Converted to selected local currency
Model price breakdown
Current constants are based on standard pricing per 1 million tokens. Update the constants if model pricing changes.
Input price
$0.75 / 1M tokens
Prompt and input tokens
Cached input price
$0.075 / 1M tokens
Cached prompt tokens when applicable
Output price
$4.50 / 1M tokens
Generated answer tokens
Prompt cost formulas
Input cost
Input tokens ÷ 1,000,000 × input price
Output cost
Output tokens ÷ 1,000,000 × output price
Monthly cost
Cost per prompt × requests per day × usage days
This calculator gives estimates only. Actual API cost can vary based on model, exact tokenization, prompt caching, tools, retries, service tier, taxes, and pricing changes.
Usage guide
Prompt cost estimates and token limits
This calculator helps estimate AI prompt or API cost from token usage and model pricing assumptions. It is useful for planning but should be checked against the official provider pricing page before billing decisions.
How to use ChatGPT Prompt Cost Calculator
- 1.Estimate or paste the input size.
- 2.Enter expected output size and model pricing assumptions.
- 3.Compare cost per request, per day, or per month depending on your usage pattern.
Examples
- A support chatbot can estimate monthly cost from daily message volume.
- A batch summarization workflow can compare short and long prompts.
- A developer can model cost before adding AI features to an app.
Limitations and notes
- AI pricing changes over time, so always verify current pricing with the provider before making financial decisions.
- Token estimates can differ from exact tokenizer counts depending on language, formatting, and model.
Is this the exact bill I will pay?
No. It is an estimate based on your inputs and pricing assumptions. Your actual bill depends on provider pricing and real token usage.
Why do tokens matter?
Many AI APIs price usage by tokens, which are pieces of text used for input and output processing.
For transparency, review Tool Nova's data source policy and editorial policy.
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What this ChatGPT prompt cost calculator helps you estimate
This ChatGPT prompt cost calculator helps developers, creators, and teams estimate the cost of running repeated AI prompts.
It estimates input tokens from pasted text, combines that with expected output tokens, and applies model pricing per 1 million tokens.
The tool is useful for planning AI apps, content workflows, support bots, automations, and internal tools.
It can also estimate savings from reducing prompt length, which is helpful for high-volume API usage.
The results are estimates only. Actual costs can vary by model, exact tokenization, caching, tools, retries, service tier, taxes, and pricing changes.
Common uses for a ChatGPT prompt cost calculator
- Estimating ChatGPT API cost per prompt
- Planning monthly OpenAI API budget
- Estimating token usage from prompt text
- Comparing prompt cost across models
- Calculating savings from shorter prompts
- Budgeting AI workflows for websites, apps, and automations
Common ChatGPT prompt cost examples
How this ChatGPT prompt cost calculator works
Paste a prompt to estimate input tokens from the text.
Choose an AI model and enter expected output tokens, requests per day, and usage days per month.
The calculator estimates cost per prompt, monthly API cost, yearly API cost, and local-currency cost.
Use the savings simulator to estimate how much shorter prompts could reduce monthly and yearly costs.
Frequently Asked Questions
How do you estimate ChatGPT prompt cost?
Estimate input tokens and output tokens, divide each by 1,000,000, then multiply by the selected model's token prices. Multiply cost per prompt by request volume to estimate monthly cost.
Is the token estimate exact?
No. This calculator estimates tokens from text. Actual token counts can vary by model, tokenizer, language, formatting, and API features.
Can shorter prompts reduce API cost?
Yes. If a repeated prompt is shorter, input-token cost can decrease, especially for high-volume applications.
Are ChatGPT subscription and API costs the same?
No. ChatGPT subscriptions are separate from API usage. API costs are usually billed by token usage for apps, websites, or developer projects.
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