Claude charges per token, not per conversation or monthly subscription

Claude is an AI assistant made by Anthropic. When you use Claude, you pay for the number of tokens you send to it and receive back — not for how many times you chat or how long you use it. A token is roughly four characters of text. If you type 100 words, that's about 25 tokens. If Claude writes back 100 words, that's another 25 tokens you pay for.

You can use Claude through Claude.ai (the web version) or through an API (a way for other software to talk to Claude). The pricing differs between the two, and Claude.ai has a free tier that lets you use it without paying anything, up to a limit.

There is no monthly subscription for Claude itself. You pay only for what you use, the way you pay for electricity or water — though you can set spending limits so you never go over a certain amount per month.

Key Takeaways

  • Claude charges by the token: roughly four characters of text cost one token, and you pay for both the text you send and the text Claude sends back.
  • Claude.ai (the free web version) lets you send a limited number of messages per day at no cost, with a higher limit if you pay a monthly fee.
  • The API (used by developers and businesses) charges a different rate per token than Claude.ai and is meant for high-volume use.
  • You set a spending limit on your account, and Claude stops responding once you hit it, so you cannot accidentally run up a large bill.

How token counting actually works

A token is not exactly one word. English text averages about 1.3 tokens per word, so a 100-word email is roughly 130 tokens. Punctuation, spaces, and line breaks each count as tokens too. Numbers and special characters sometimes count as one token, sometimes as more — the exact rules depend on how the text is broken up.

You do not need to count tokens yourself. When you use Claude.ai, the interface shows you how many tokens you have used. When you use the API, you can see the token count in the response Claude sends back. Both Anthropic and third-party websites offer token counters if you want to estimate before you send something.

The reason Claude charges by token instead of by conversation is that a long conversation uses more computing power than a short one. Charging by token makes the cost match the actual work Claude does.

Claude.ai pricing: free tier and paid tier

Claude.ai is the web version you access by going to claude.ai in your browser. The free tier lets you send a certain number of messages per day — Anthropic does not publish the exact limit, but it is enough for casual use. You do not enter a credit card, and you cannot be charged.

If you pay a monthly fee (currently $20 per month in the United States, though this varies by country), you get a higher message limit per day and faster response times. You still do not pay per token — you pay a flat monthly amount and can use Claude as much as you want up to the daily message limit.

The free tier and paid tier both use the same Claude model, so the quality of answers is the same. The difference is how many times per day you can use it.

API pricing: how developers and businesses pay

The API is a way for other software to use Claude. If you build an app, a chatbot, or a business tool that runs Claude in the background, you use the API. Anthropic charges per token for API use, and the rate is lower than Claude.ai because API customers typically use Claude in much larger volumes.

API pricing has two rates: one for tokens you send to Claude (the input) and a higher rate for tokens Claude sends back (the output). The output rate is higher because generating text uses more computing power than reading it. As of early 2024, the rates vary depending on which version of Claude you use, with newer versions costing more per token.

If you use the API, you set a monthly spending limit on your Anthropic account. Claude stops responding once you hit that limit, so you cannot accidentally pay more than you planned.

What affects how much you pay

The main factor is how many tokens you use. A short question costs less than a long one. A long answer costs more than a short one. If you ask Claude to write a 5,000-word essay, you pay for all 5,000 words plus the tokens in your question.

The version of Claude you use also matters. Anthropic offers several versions: Claude 3.5 Sonnet (the newest and most capable), Claude 3 Opus (older but still powerful), and Claude 3 Haiku (smaller and cheaper). Newer versions cost more per token. If you use the API, you choose which version to use for each request, so you can use the cheaper version for straightforward tasks and the expensive version only when you need it.

On Claude.ai, you cannot choose the version — you get the current default version included in your subscription. The paid tier ($20 per month) gives you access to the latest version.

How to control your spending

On Claude.ai, if you have the free tier, you cannot spend money — you just hit the daily message limit and have to wait until the next day. If you have the paid tier, you pay a flat $20 per month no matter how much you use it (up to the daily limit), so your bill is predictable.

If you use the API, set a spending limit in your account settings. Anthropic recommends setting it lower than the maximum you are willing to pay, so you have a buffer. Once you hit the limit, Claude stops responding to new requests, and you have to raise the limit or wait until the next month if you set a monthly reset.

You can also monitor your usage in real time. Both Claude.ai and the API dashboard show you how many tokens you have used and how much you have spent so far in the current billing period.

Frequently Asked Questions

Do I pay for conversations I start but do not finish?

No. You pay only for tokens you actually send to Claude and tokens Claude actually sends back to you. If you start typing a question and close the tab without sending it, you pay nothing. If you send a question but delete the conversation before reading the answer, you still pay for the tokens Claude used to generate that answer.

Can I use Claude for free?

Yes, through Claude.ai. The free tier has a daily message limit but no cost. You do not need a credit card. If you hit the limit, you can use it again the next day. The paid tier ($20 per month) raises the daily limit and gives you access to the newest version of Claude.

What is the difference between Claude.ai and the API?

Claude.ai is the web version you use in your browser — you type questions and get answers. The API is for developers and businesses who want to build software that uses Claude. Claude.ai charges a flat monthly fee (or is free). The API charges per token. Most people use Claude.ai.

Will my bill surprise me?

On Claude.ai paid tier, no — you pay $20 per month, flat. On the API, you set a spending limit, and Claude stops working once you hit it. You can also check your usage and spending in your account dashboard at any time.

Does Claude charge for storing my conversations?

No. You pay only for the tokens you use when you send and receive messages. Storing past conversations does not cost anything.