# API restrictions The following restrictions apply to the `InvokeModel`, `InvokeModelWithResponseStream`, `Converse`, and `ConverseStream` operations. Some restrictions vary by operation or model as noted below: + When using these operations, you can only include images and documents if the `role` is `user`. + **Video generation:** Video generation is not supported with `InvokeModel` and `InvokeModelWithResponseStream`. Instead, you can use the [StartAsyncInvoke](https://docs.aws.amazon.com/bedrock/latest/APIReference/API_runtime_StartAsyncInvoke.html) operation. For an example, see [Use Amazon Nova Reel to generate a video from a text prompt](https://docs.aws.amazon.com/bedrock/latest/userguide/bedrock-runtime_example_bedrock-runtime_Scenario_AmazonNova_TextToVideo_section.html). + **Document support in request body:** Including documents in the request body is not supported when using `InvokeModel` and `InvokeModelWithResponseStream`. To include a document during inference, use the [Chat/text playground](playgrounds.md) in the AWS Management Console or use the `Converse` or `ConverseStream` operations. + **Document count and size:** You can include up to 5 documents per request. Each document can be no more than 4.5 MB in size. For Claude 4 and subsequent versions, the 4.5 MB document size restriction doesn't apply to `PDF` format. For Nova models, the 4.5 MB document size restriction doesn't apply to `PDF` and `DOCX` formats. These restrictions continue to apply in the Bedrock Console. Individual models may have additional content restrictions beyond those applied by Amazon Bedrock. For more information, see **Third-party model provider requirements**. + **Image count and size**: Amazon Bedrock doesn't impose restrictions on image count and size. However, individual models may have specific image requirements. For more information, see **Third-party model provider requirements**. + **Third-party model provider requirements:** Third-party model provider requirements apply when you use `InvokeModel`, `InvokeModelWithResponseStream`, `Converse`, and `ConverseStream` operations, and may result in an error if not met. If you use a third-party model through Amazon Bedrock (for example, Anthropic Claude), review the provider's user guide and API documentation to avoid unexpected errors. For example, the Anthropic Messages standard endpoint supports a maximum request size of 32 MB. Claude also has specific content requirements, such as a maximum of 100 `PDF` pages per request and a maximum image size of 8000x8000 px. For the latest information about Anthropic Claude Messages requests and responses, including request size and content requirements, see the following Anthropic Claude documentation: [Anthropic Claude API Overview](https://platform.claude.com/docs/en/api/overview), [Anthropic Claude Messages API Reference](https://docs.anthropic.com/claude/reference/messages_post), [Build with Claude: Vision](https://platform.claude.com/docs/en/build-with-claude/vision) and [Build with Claude: PDF Support](https://platform.claude.com/docs/en/build-with-claude/pdf-support). **Tip** Claude requires PDF documents to be a maximum of 100 pages per request. If you have larger PDF documents, we recommend splitting them into multiple PDFs under 100 pages each or consolidating more text into fewer pages.