CreateProjectVersion - Amazon Rekognition


Creates a new version of a model and begins training. Models are managed as part of an Amazon Rekognition Custom Labels project. You can specify one training dataset and one testing dataset. The response from CreateProjectVersion is an Amazon Resource Name (ARN) for the version of the model.

Training takes a while to complete. You can get the current status by calling DescribeProjectVersions.

Once training has successfully completed, call DescribeProjectVersions to get the training results and evaluate the model.

After evaluating the model, you start the model by calling StartProjectVersion.

This operation requires permissions to perform the rekognition:CreateProjectVersion action.

Request Syntax

{ "OutputConfig": { "S3Bucket": "string", "S3KeyPrefix": "string" }, "ProjectArn": "string", "TestingData": { "Assets": [ { "GroundTruthManifest": { "S3Object": { "Bucket": "string", "Name": "string", "Version": "string" } } } ], "AutoCreate": boolean }, "TrainingData": { "Assets": [ { "GroundTruthManifest": { "S3Object": { "Bucket": "string", "Name": "string", "Version": "string" } } } ] }, "VersionName": "string" }

Request Parameters

The request accepts the following data in JSON format.


The Amazon S3 location to store the results of training.

Type: OutputConfig object

Required: Yes


The ARN of the Amazon Rekognition Custom Labels project that manages the model that you want to train.

Type: String

Length Constraints: Minimum length of 20. Maximum length of 2048.

Pattern: (^arn:[a-z\d-]+:rekognition:[a-z\d-]+:\d{12}:project\/[a-zA-Z0-9_.\-]{1,255}\/[0-9]+$)

Required: Yes


The dataset to use for testing.

Type: TestingData object

Required: Yes


The dataset to use for training.

Type: TrainingData object

Required: Yes


A name for the version of the model. This value must be unique.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 255.

Pattern: [a-zA-Z0-9_.\-]+

Required: Yes

Response Syntax

{ "ProjectVersionArn": "string" }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


The ARN of the model version that was created. Use DescribeProjectVersion to get the current status of the training operation.

Type: String

Length Constraints: Minimum length of 20. Maximum length of 2048.

Pattern: (^arn:[a-z\d-]+:rekognition:[a-z\d-]+:\d{12}:project\/[a-zA-Z0-9_.\-]{1,255}\/version\/[a-zA-Z0-9_.\-]{1,255}\/[0-9]+$)



You are not authorized to perform the action.

HTTP Status Code: 400


Amazon Rekognition experienced a service issue. Try your call again.

HTTP Status Code: 500


Input parameter violated a constraint. Validate your parameter before calling the API operation again.

HTTP Status Code: 400


An Amazon Rekognition service limit was exceeded. For example, if you start too many Amazon Rekognition Video jobs concurrently, calls to start operations (StartLabelDetection, for example) will raise a LimitExceededException exception (HTTP status code: 400) until the number of concurrently running jobs is below the Amazon Rekognition service limit.

HTTP Status Code: 400


The number of requests exceeded your throughput limit. If you want to increase this limit, contact Amazon Rekognition.

HTTP Status Code: 400


The specified resource is already being used.

HTTP Status Code: 400


The collection specified in the request cannot be found.

HTTP Status Code: 400


Amazon Rekognition is temporarily unable to process the request. Try your call again.

HTTP Status Code: 500

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: