# How Does Cohere's Pricing Work?

If you're looking to scale use cases in production, Cohere models are some of the most cost-efficient options on the market today. This page contains information about how Cohere's pricing model operates, for each of our major model offerings.

:::callout{intent="info"}
You can find up-to-date prices for each of our generation, rerank, and embed models on the [dedicated pricing page](https://cohere.com/pricing).
:::

## How Are Costs Calculated for Different Cohere Models?

Our generative models, such as [Command A+](/guides/models-the-command-family-of-models-command-a-plus), [Command A](/guides/models-the-command-family-of-models-command-a), [Command R7B](/guides/models-the-command-family-of-models-command-r7b),
[Command R](/guides/models-the-command-family-of-models-command-r), and [Command R+](/guides/models-the-command-family-of-models-command-r-plus), are priced on a per-token basis. Be aware that input tokens
(i.e. tokens generated from text sent _to_ the model) and output tokens (i.e. text generated _by_ the model) are priced differently.

Our Rerank models are priced based on the quantity of searches, and our Embedding models are priced based on the number of tokens embedded.

### What's the Difference Between "billed" Tokens and Generic Tokens?

When using the [Chat API endpoint](/api), the response will contain the total count of input and output tokens, as well as the count of _billed_ tokens. Here's an example:

```json JSON
{
  "billed_units": {
    "input_tokens": 6772,
    "output_tokens": 248
  },
  "tokens": {
    "input_tokens": 7596,
    "output_tokens": 645
  }
}
```

The rerank and embed models have their own, slightly different versions, and it may not be obvious why there are separate input and output values under `billed_units`. To clarify, the _billed_ input and output tokens are the tokens that you're actually _billed_ for. The reason these values can be different from the overall `"tokens"` value is that there are situations in which Cohere adds tokens under the hood, and there are others in which a particular model has been trained to do so (i.e. when outputting special tokens). Since these are tokens _you don't have control over, you are not charged for them._

## Trial Usage and Production Usage

Cohere makes a distinction between "trial" and "production" usage of an API key.

With respect to pricing, the key thing to understand is that trial API key usage is free, [but limited](/guides/going-to-production-rate-limits). Developers wanting to test different applications or build proofs of concept can use all of Cohere's models and APIs can do so with a trial key by simply [signing up for a Cohere account](https://dashboard.cohere.com/welcome/register).

## Related pages

- [Changelog](../changelog.md)
- [Cohere](../index.md)
- [Cohere API](./cohere-api-index.md)
- [Cohere Labs](./cohere-labs-index.md)
- [Cohere Platform](./cohere-platform-index.md)
- [Cookbooks](./cookbooks-index.md)
- [Deployment Options](./deployment-options-index.md)
- [Embeddings (Vectors, Search, Retrieval)](./embeddings-vectors-search-retrieval-index.md)
- [Get Started](./get-started-index.md)
- [Going to Production](./going-to-production-index.md)

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