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Inside an LLM

Token Cost Estimator

AI services often count text using tokens. More tokens usually means more cost.

This is a simple learning estimator, not exact pricing for any real AI provider.

Interactive Playground
Statistics
0
Input Tokens
0
Output Tokens
0
Total Tokens
$0.00000
Input Cost
$0.00000
Output Cost
$0.00000
Total Cost
Cost Formula
Cost = (input tokens × input rate)
+ (output tokens × output rate)
Example (GPT-4o mini)
📥 100 input tokens × $0.15 / 1M = $0.000015
📤 50 output tokens × $0.60 / 1M = $0.000030
💰 Total $0.000045

💡 Output tokens are always more expensive than input tokens, AI generating text costs more than reading it.

Token Breakdown & Cost
Input Tokens 0 tokens
Prompt tokens appear here…
Output Tokens 0 tokens
Response tokens appear here…
Input Cost $0.00000
Output Cost $0.00000
Total Estimated Cost
$0.00000
for this prompt + response pair
Output tokens are always more expensive, generating text takes more compute than reading it.
Shorten your system prompt, it's sent with every request. A 500-token system prompt × 1000 calls = 500,000 extra tokens billed.
💡
Key Takeaway

Longer prompts and longer responses use more tokens, which can increase the cost of using AI services.