AI Tools

AI Cost Estimator

Paste a prompt, choose a supported model, add an expected output token count, and estimate the request cost instantly. This page is useful for API budgeting, prompt planning, usage forecasts, and comparing model spend before you send a request.

Estimate AI Prompt Cost Online

Estimate AI API cost online for free using prompt size, expected output tokens, and model pricing before you send a request.

Model

Estimated output tokens

Prompt text

Show line numbers

Cost estimate

Selected model: GPT-5
Provider: OpenAI
Token count quality: Tokenizer-backed
Pricing quality: Manual pricing table
Pricing basis: Standard API pricing, uncached text input/output
Pricing last reviewed: March 22, 2026
Input tokens: 23
Estimated output tokens: 250
Total tokens: 273
Input price per 1M tokens: $1.25
Output price per 1M tokens: $10.00
Estimated input cost: $0.000029
Estimated output cost: $0.002500
Estimated total cost: $0.002529

Paste content and run the tool instantly.

Why Use This AI Cost Estimator

Estimate request cost before you send an API call
Combine prompt token counts with expected output tokens
Compare model spend with one shared workflow
Copy or download the pricing summary

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Common Situations Where This Helps

You want to compare model costs before shipping a prompt workflow.
A planned feature needs rough per-request budget numbers.
You need a quick estimate for prompt-heavy or batch-like usage.
You are trying to choose between a premium model and a lower-cost option.

Which Tool Should You Choose?

AI Cost Estimator: Choose this when you need estimated input, output, and total token cost for a selected AI model.

AI Token Counter: Choose the token counter when you only need token totals and text metrics without pricing.

Common Problems This Tool Solves

I know my prompt size but not the likely spend. Estimate the cost with the prompt token count and your expected output size before sending the request.

I want to compare several model choices quickly. Switch the model selector and reuse the same prompt to compare estimated request cost across providers.

I need a pricing summary I can share with teammates. Use the generated output to copy or download a concise cost estimate with the pricing basis and review date.

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Frequently Asked Questions

How do I estimate AI API cost?

Paste your prompt, choose a supported model, enter the expected output token count, and run the estimator to see input, output, and total cost.

Does this tool count prompt tokens automatically?

Yes. The estimator measures the prompt text first, then combines that input count with your expected output token count.

Are these AI prices live?

No. This tool uses a maintained pricing table and shows the pricing review date in the output, so you should still verify critical billing decisions against the provider's latest pricing page.

Are Gemini and DeepSeek token counts exact?

No. Gemini and DeepSeek options on this page use local token estimation, so pricing totals should be treated as useful estimates rather than exact billable numbers.

Does this estimate include cached input or tool-call fees?

No. The current estimate is for standard uncached text input and output tokens only.