diff --git a/src/sagemaker/dataset_definition/inputs.py b/src/sagemaker/dataset_definition/inputs.py
index 468be22ac3..e9df05005c 100644
--- a/src/sagemaker/dataset_definition/inputs.py
+++ b/src/sagemaker/dataset_definition/inputs.py
@@ -198,7 +198,7 @@ def __init__(
                 the path to a local directory. If not provided, skips data download
                 by SageMaker platform.
             s3_data_type (str, default="S3Prefix"): Valid options are "ManifestFile" or "S3Prefix".
-            s3_input_mode (str, default="File"): Valid options are "Pipe" or "File".
+            s3_input_mode (str, default="File"): Valid options are "Pipe", "File" or "FastFile".
             s3_data_distribution_type (str, default="FullyReplicated"):
                 Valid options are "FullyReplicated" or "ShardedByS3Key".
             s3_compression_type (str, default=None): Valid options are "None" or "Gzip".
diff --git a/src/sagemaker/model_monitor/model_monitoring.py b/src/sagemaker/model_monitor/model_monitoring.py
index 53dc0a0bfe..a28eaa184b 100644
--- a/src/sagemaker/model_monitor/model_monitoring.py
+++ b/src/sagemaker/model_monitor/model_monitoring.py
@@ -3933,7 +3933,8 @@ def __init__(
         Args:
             endpoint_name (str): The name of the endpoint.
             destination (str): The destination of the input.
-            s3_input_mode (str): The S3 input mode. Can be one of: "File", "Pipe. Default: "File".
+            s3_input_mode (str): The S3 input mode. Can be one of: "File", "Pipe" or "FastFile".
+                Default: "File".
             s3_data_distribution_type (str): The S3 Data Distribution Type. Can be one of:
                 "FullyReplicated", "ShardedByS3Key"
             start_time_offset (str): Monitoring start time offset, e.g. "-PT1H"
@@ -4043,7 +4044,8 @@ def __init__(
             data_captured_destination_s3_uri (str): Location to the batch transform captured data
                 file which needs to be analysed.
             destination (str): The destination of the input.
-            s3_input_mode (str): The S3 input mode. Can be one of: "File", "Pipe. (default: File)
+            s3_input_mode (str): The S3 input mode. Can be one of: "File", "Pipe" or
+                "FastFile". (default: File)
             s3_data_distribution_type (str): The S3 Data Distribution Type. Can be one of:
                 "FullyReplicated", "ShardedByS3Key" (default: FullyReplicated)
             start_time_offset (str): Monitoring start time offset, e.g. "-PT1H" (default: None)
diff --git a/src/sagemaker/processing.py b/src/sagemaker/processing.py
index c82d4e1194..a020abc140 100644
--- a/src/sagemaker/processing.py
+++ b/src/sagemaker/processing.py
@@ -1242,7 +1242,7 @@ def __init__(
             input_name (str or PipelineVariable): The name for the input. If a name
                 is not provided, one will be generated (eg. "input-1").
             s3_data_type (str or PipelineVariable): Valid options are "ManifestFile" or "S3Prefix".
-            s3_input_mode (str or PipelineVariable): Valid options are "Pipe" or "File".
+            s3_input_mode (str or PipelineVariable): Valid options are "Pipe", "File" or "FastFile".
             s3_data_distribution_type (str or PipelineVariable): Valid options are "FullyReplicated"
                 or "ShardedByS3Key".
             s3_compression_type (str or PipelineVariable): Valid options are "None" or "Gzip".