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AI Chatbot Monthly Cost Calculator

Model the monthly text-token cost of an AI chatbot from active users, conversation volume, message count, and average token usage.

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Inputs

PricingChoose a model or enter custom rates
Monthly volumeEstimate users and chat activity
Average tokensPer assistant response
Results update automatically

Results

Result Enter values to calculate.
Your result explanation will appear here.

Useful next checks

  • Check the inputs before relying on the result.
  • Try a second scenario to compare outcomes.
  • Read the guide below for context.

# AI Chatbot Monthly Cost Calculator

Use this calculator to estimate monthly API spending for an AI chatbot. It combines active users, conversations per user, assistant messages per conversation, average input tokens, average output tokens, and model pricing.

How It Works

The calculator estimates:

  • Conversations per month = users x conversations per user
  • AI messages per month = conversations x AI messages per conversation
  • Input cost = monthly input tokens x input price per 1M tokens
  • Output cost = monthly output tokens x output price per 1M tokens
  • Monthly cost = input cost + output cost

What To Include

Average input tokens should include the current user message, system prompts, relevant chat history, memory, and retrieved context. Average output tokens should reflect the assistant response only.

Example

If 1,000 users each have 4 conversations per month and each conversation has 6 assistant replies, that is 24,000 billable assistant messages. At 750 input tokens and 250 output tokens per reply, the calculator multiplies those totals by the selected model rates.

Limitations

This is a text-token estimate. It excludes cache discounts, batch pricing, tools, search, moderation, vector databases, hosting, image or audio charges, taxes, free tiers, regional uplifts, and account-specific discounts.

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Frequently asked questions

Is a message the same as a conversation?

No. This calculator treats a conversation as a session containing multiple assistant replies, and each assistant reply has its own input and output token cost.

Should I include system prompts and history?

Yes. Average input tokens should include system prompts, retrieved context, previous chat history, and the current user message.

Does this include platform or hosting costs?

No. It estimates text-token API cost only, not app hosting, vector databases, support tools, analytics, or moderation pipelines.