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Calixo

Chatbot Cost per Conversation Calculator

Estimate the monthly LLM cost of running a chatbot from average tokens per conversation.

Inputs

Saved Scenarios

— select 2+ to compare

Total Monthly Cost

$40.00

Cost per Conversation

$0.0040

Spark says

How it's calculated

Formula

Monthly Cost=Avg Tokens1,000×Price per 1,000×ConversationsMonthly\ Cost = \dfrac{Avg\ Tokens}{1{,}000} \times Price\ per\ 1{,}000 \times Conversations
Avg\ Tokens
— Average total tokens (prompt + history + response) per conversation

What is the Chatbot Cost per Conversation Calculator?

A chatbot's per-conversation cost depends on how much context (system prompt, chat history, tools/RAG results) gets sent on every turn — this calculator projects total monthly spend from an average token figure.

How to use it

  1. 1 Enter the average total tokens used across a typical conversation.
  2. 2 Enter your model's price per 1,000 tokens.
  3. 3 Enter expected conversations per month.

Worked examples

2,000 tokens/convo, $0.002/1K tokens, 10,000 convos/month

About $40.00/month.

Try it

Limitations

  • •Real conversations vary widely in length — use a measured average from actual usage logs where possible, not a guess.

Frequently asked questions

Why does cost per conversation grow with longer chat history?

Most chat APIs are stateless — the full conversation history gets resent (and re-billed) on every turn, so longer conversations cost progressively more per additional message.