# ReasoningTextBlock
<a name="API_runtime_ReasoningTextBlock"></a>

Contains the reasoning that the model used to return the output.

## Contents
<a name="API_runtime_ReasoningTextBlock_Contents"></a>

 ** text **   <a name="bedrock-Type-runtime_ReasoningTextBlock-text"></a>
The reasoning that the model used to return the output.  
Type: String  
Required: Yes

 ** signature **   <a name="bedrock-Type-runtime_ReasoningTextBlock-signature"></a>
A token that verifies that the reasoning text was generated by the model. If you pass a reasoning block back to the API in a multi-turn conversation, include the text and its signature unmodified.  
Type: String  
Required: No

## See Also
<a name="API_runtime_ReasoningTextBlock_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/bedrock-runtime-2023-09-30/ReasoningTextBlock) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-runtime-2023-09-30/ReasoningTextBlock) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/bedrock-runtime-2023-09-30/ReasoningTextBlock)