> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/mariadb-cloud/cloud-ai/ai-retrieval/supported-models-formats-and-regions.md).

# Supported Models, Formats, and Regions

The embedding and generation models, the file formats, and the regions that MariaDB Cloud AI Retrieval supports, and how it keeps traffic in a region.

This page lists the models, file formats, and regions that AI Retrieval supports.

## Models for Document Knowledge Bases

A document knowledge base uses an embedding model, which turns each chunk and each question into an embedding, and a generation model, which writes an answer from the retrieved chunks. You select both when you create a knowledge base. You can change the generation model for a single request, but you cannot change the embedding model after you create the knowledge base.

### Embedding Models

| Provider       | Model                       | Where the model runs                                                              |
| -------------- | --------------------------- | --------------------------------------------------------------------------------- |
| Amazon Bedrock | Cohere Embed 3 English      | In the region of the knowledge base                                               |
| Amazon Bedrock | Cohere Embed 3 Multilingual | In the region of the knowledge base                                               |
| Amazon Bedrock | Cohere Embed 4              | In `us-east-1` only                                                               |
| Google         | Gemini Embedding 2          | Outside your cloud. Traffic goes to the public Google endpoint over the internet. |

The create form lists the embedding models that are available in the region that you select. For the regions of the Cohere models, see [Cohere models](https://docs.aws.amazon.com/bedrock/latest/userguide/models-region-compatibility.html#model-regions-cohere) in the Amazon Bedrock documentation.

### Generation Models

| Provider       | Model            | Where the model runs                                                                                                         |
| -------------- | ---------------- | ---------------------------------------------------------------------------------------------------------------------------- |
| Amazon Bedrock | Claude Fable 5.1 | In the geography of the knowledge base, such as the United States or Europe, or globally where no geographic endpoint exists |
| Amazon Bedrock | Claude Opus 5    | The same as Claude Fable 5.1                                                                                                 |
| Amazon Bedrock | Claude Sonnet 5  | The same as Claude Fable 5.1                                                                                                 |
| Google         | Gemini 3.8 Flash | Outside your cloud. Traffic goes to the public Google endpoint over the internet.                                            |

For the regions of the Claude models, see [Anthropic models](https://docs.aws.amazon.com/bedrock/latest/userguide/models-region-compatibility.html#model-regions-anthropic) in the Amazon Bedrock documentation.

## Models for Database Knowledge Bases

A database knowledge base has no model selector. To generate an answer from the rows, it uses GPT 5.6 Luna.

## Supported File Formats for Document Knowledge Bases

| Format               | Extension |
| -------------------- | --------- |
| Text                 | `.txt`    |
| Markdown             | `.md`     |
| Web page             | `.html`   |
| JSON                 | `.json`   |
| Microsoft Word       | `.docx`   |
| PDF                  | `.pdf`    |
| Microsoft PowerPoint | `.pptx`   |

Documents must be in English.

{% hint style="warning" %}
Scanned documents, which are PDFs that contain only images of pages, and password-protected PDFs are not supported yet.
{% endhint %}

For the maximum document size and the other limits, see [Service Quotas](/docs/mariadb-cloud/cloud-ai/ai-retrieval/service-quotas.md).

## Supported Regions

### Document Knowledge Bases

A document knowledge base processes your data in the region that you select: its vector store, its ingestion, and its retrieval all run in that region. Document knowledge bases run on AWS in these regions:

| Region           | Location    |
| ---------------- | ----------- |
| `us-east-1`      | N. Virginia |
| `eu-west-2`      | London      |
| `eu-central-1`   | Frankfurt   |
| `ap-southeast-1` | Singapore   |

Google Cloud and Azure are not available yet. The create form shows both and offers to register your interest.

### Database Knowledge Bases

Database knowledge bases are available globally, in every region.

## Next Steps

{% content-ref url="/pages/P8jIKgH1GRY4u4S0mHqc" %}
[Access and Security](/docs/mariadb-cloud/cloud-ai/ai-retrieval/access-and-security.md)
{% endcontent-ref %}

{% content-ref url="/pages/VvBZ0j71jH4il7tRtaBk" %}
[Document Knowledge Bases](/docs/mariadb-cloud/cloud-ai/ai-retrieval/document-knowledge-bases.md)
{% endcontent-ref %}

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