--- title: AWSBedrockCohereStream description: Learn to use AWSBedrockCohereStream helper function in your application. --- # `AWSBedrockCohereStream` AWSBedrockCohereStream has been removed in AI SDK 4.0. AWSBedrockCohereStream is part of the legacy AWS Bedrock integration. It is not compatible with the AI SDK 3.1 functions. ## Import The AWS Bedrock stream functions are utilties that transform the outputs from the AWS Bedrock API into a ReadableStream. It uses AIStream under the hood and handles parsing Bedrock's response. ### React ## API Signature ### Parameters ', description: 'An optional async iterable of objects containing optional binary data chunks.', }, ], }, ], }, { name: 'callbacks', type: 'AIStreamCallbacksAndOptions', isOptional: true, description: 'An object containing callback functions to handle the start, each token, and completion of the AI response. In the absence of this parameter, default behavior is implemented.', properties: [ { type: 'AIStreamCallbacksAndOptions', parameters: [ { name: 'onStart', type: '() => Promise', description: 'An optional function that is called at the start of the stream processing.', }, { name: 'onCompletion', type: '(completion: string) => Promise', description: "An optional function that is called for every completion. It's passed the completion as a string.", }, { name: 'onFinal', type: '(completion: string) => Promise', description: 'An optional function that is called once when the stream is closed with the final completion message.', }, { name: 'onToken', type: '(token: string) => Promise', description: "An optional function that is called for each token in the stream. It's passed the token as a string.", }, ], }, ], }, ]} /> ### Returns A `ReadableStream`.