What does one chat cost?

A pretend chat with an AI service, sized in tokens. No network and no real bill.

System prompt
Re-sent history
New message
Reply
Hidden reasoning
Without trimming

Turns per chat

Keep last turns

Reasoning per reply tokens, billed as output

Chats per day

More settings

System prompt (tokens)

Message (tokens)

Reply (tokens)

Calls made twice (%)sent again in full

Example prices

Dollars per million input tokens

Dollars per million output tokens

These are example figures, not a quote from any provider. The lesson page links each provider’s pricing page. Word counts are rough and for English text.

Show the numbers

Turn	System	History	New	Reply	Reasoning	Input	Output	Cost