AI Chatbot Cost Calculator

Monthly cost of a support chatbot: your own model bill against per-resolution pricing

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Your support volume

Result

Own chatbot, Claude Haiku 5.5
$9.00
Own chatbot, per conversation
$0.0018
Fin with your helpdesk, 2,500 outcomes
$2,475
Fin per resolved conversation
$0.99

Your own chatbot pays for model tokens on every conversation, resolved or not. Fin bills only resolved conversations, with a $49 monthly minimum when used with an existing helpdesk. Model cost per resolved conversation on your own build: $0.0036.

Model cost per month at your volume

ModelPer conversationPer month
Claude Haiku 5.5
Prompts up to 100,000 tokens.
$0.0018$9.00
Claude Sonnet 5.5$0.0360$180
OpenAI gpt-6-luna
Standard tier.
$0.0018$9.00
OpenAI gpt-6.1-terra
Standard tier.
$0.0180$90
OpenAI gpt-6.1-sol
Standard tier.
$0.0360$180
Gemini 3.8 Flash
Price through December 31, 2026. $1.50 / $7.50 from January 1, 2027.
$0.0135$68

The formulas

Model cost per conversation = replies x (input tokens x input price + output tokens x output price) / 1,000,000
Own chatbot per month       = model cost per conversation x conversations
Fin outcomes                = conversations x resolved %
Fin per month               = max($49, outcomes x $0.99)
What this number does not include. For your own chatbot, hosting, vector search, monitoring, the build itself and upkeep. Prompt caching, which can cut input cost a lot on repeated system prompts. For Fin, Intercom helpdesk seats ($19 per seat a month) if you use Intercom as your helpdesk. Taxes and volume discounts for both.

How this works

Model providers charge per million input tokens and per million output tokens. Each bot reply sends the system prompt, the help articles it retrieved and the chat so far as input, and gets the answer back as output. So the model cost of one conversation is the number of replies times the token cost of one reply. The token counts are your assumptions; log a few real conversations to replace them.

Intercom prices its Fin AI agent per outcome instead: $0.99 when a customer confirms the issue is resolved, does not ask for more help, or Fin completes a workflow, charged at most once per conversation. Used with an existing helpdesk, Fin has a $49 monthly minimum that includes 50 outcomes.

Worked example with the defaults (5,000 conversations, 4 replies, 3,000 input and 300 output tokens, Claude Haiku 5.5 at $0.10 and $0.50 per million): 4 x (3,000 x $0.10 + 300 x $0.50) / 1,000,000 = $0.0018 per conversation, or $9.00 a month. At 50% resolved, Fin bills 2,500 x $0.99 = $2,475.

Sources (read November 11, 2026)

Want a chatbot that answers from your own data and systems? AY Automate builds them from $3K a month. See AI chatbot development.

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