# Versioning

You can specify the API version you want  to use by supplying a URL in the header. For example, the URL for the stable version of Generate would be `https://api.cohere.ai/v1/generate`.

If no version is supplied in the header, then the API will default to _no version_, meaning pre-`2021-11-08`. Important note that the SDKs will default you to the most recent version, which is currently `2022-12-06`.

## Other Methods

Previously, Cohere used very simple dated versioning in the format `YYYY-MM-DD`, not to be confused with our independent model-versioning. As of March 17, 2023, this versioning method is still available, but the URL method is preferred. All model versions are compatible with all API versions. The version must match absolutely to be applied, eg if `2022-12-06` is a version and you input `2022-12-07`, the API will return an error.

The version is supplied via a `Cohere-Version` header and is used as following;

## 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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