> For the complete documentation index, see [llms.txt](https://swell-ai.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://swell-ai.gitbook.io/docs/product-guides/token-tiers.md). # Token Tiers Swell AI offers content writing with two of Open AI's flagship models; GPT 3.5 and GPT 4. | Model | Description | Token Tier | | ------- | ------------------------------------- | ---------- | | GPT 4 | Most powerful model, highest quality. | Tier 1 | | GPT 3.5 | Lower quality, faster response. | Tier 2 | Note that the more powerful, GPT 4 model are on a different Token Tier than it's counterpart, GPT 3.5. Tier 2 Tokens are free and unlimited for all accounts. Tier 1 Tokens cost **$0.05/1k** tokens. Accounts are invoiced for their Tier 1 usage at the end of each month. You may view your usage in your account's [Usage page](https://app.swellai.com/settings/usage). Every account, including the free tier, has 100k free Tier 1 Tokens a month. If on a paid plan, your first 100k tokens will be waived on your invoice. Depending on your subscription, your Account's Tier 1 Tokens usage is limited monthly. Reach out to support if you need to increase your monthly limit. Depending on your requirements and payment history we will most likely increase your limit. ### What are tokens Tokens are common sequences of characters found in a set of text. A helpful rule of thumb is that one token generally corresponds to \~4 characters of text for common English text. This translates to roughly ¾ of a word (so 100k tokens \~= 75k words). Output tokens are three times the cost of input tokens. For example, if a transcript & prompt total to 2k tokens and Swell writes 1k tokens, 2k input tokens and 1k output tokens are used. The pricing breakdown for this is: 2k + (1k \* 3) = **5k Tier 1 Tokens** 5k Tier 1 Tokens \* $0.05/1k tokens = **$0.25** ### Provide your own Open AI API Key We offer the option to provide your own Open AI API Key which when used we will not charge for any Tier 1 tokens (as the charges will accrue on your Open AI account). Your usage will still be available in your account's [Usage page](https://app.swellai.com/settings/usage) to confirm accurate usage. Reach out to support with your API key if this is of interest. **Please note that using your own API Key might run into API rate-limit failures if your Open AI account is not at a sufficient tier.** --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://swell-ai.gitbook.io/docs/product-guides/token-tiers.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.