How much will my AI chatbot cost per month?
Before committing to a model, most product teams launching a chatbot want to estimate what an AI chatbot will cost per month. This page does exactly that with an interactive calculator, so instead of guessing you get a concrete monthly cost grounded in today's provider prices.
Results update automatically as you type.
- Per message
- $0.00627
- Per session
- $0.0501
- Input cost / session
- $0.0301
- Output cost / session
- $0.0200
- Per day
- $25.06
- Per month(500 users/day)
- $751.88
Why this isn't trivial
The part people underestimate: reply length and the conversation history you resend each turn quietly drive most of the bill, not the system prompt. In practice the biggest savings come from trimming responses and capping the history window, so it is worth modelling before you commit.
How it's calculated
We estimate this by multiplying the tokens in each message and the retained history by your monthly message volume and the model's input and output rates. Every figure uses the current provider prices baked into the site (reviewed daily), and you can override any input to match your own assumptions.
Frequently asked questions
What drives an AI chatbot's monthly cost the most?+
Output tokens and resent conversation history usually dominate — far more than the one-time system prompt.
How can I lower my chatbot bill?+
Shorten answers, cap how many past turns you resend, and route simple questions to a cheaper model.
Are these prices up to date?+
Yes. The model prices behind this calculator are refreshed and reviewed daily, so your estimate reflects current provider rates rather than a stale snapshot.
Related
Estimates for planning. Pricing data last reviewed 28 July 2026.