# Release Notes September 29th 2023

**We're Releasing co.chat() and the Chat + RAG Playground**

We're pleased to announce that we've released our `co.chat()` beta! Of particular importance is the fact that the `co.chat()` API is able to utilize [retrieval augmented generation](/guides/text-generation-retrieval-augmented-generation-rag) (RAG), meaning developers can provide sources of context that inform and ground the model's output.

This represents a leap forward in the accuracy, verifiability, and timeliness of our generative AI offering. For our public beta, developers can connect `co.chat()` to web search or plain text documents.

Access to the `co.chat()` public beta is available through an API key included with a Cohere account.

**Our Command Model has Been Updated**

We've updated both the `command` and `command-light` models. Expect improved question answering, generation quality, rewriting and conversational capabilities.

**New Rate Limits**

For all trial keys and all endpoints, there is now a rate limit of 5000 calls per month.

## 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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