diff --git a/caikit_nlp/data_model/generation.py b/caikit_nlp/data_model/generation.py
index c72d54ee..537416cc 100644
--- a/caikit_nlp/data_model/generation.py
+++ b/caikit_nlp/data_model/generation.py
@@ -15,10 +15,10 @@
 """
 # Standard
 from enum import Enum
-from typing import List
+from typing import List, Optional
 
 # First Party
-from caikit.core import DataObjectBase
+from caikit.core import DataObjectBase, dataobject
 
 # First party
 import alog
@@ -71,3 +71,33 @@ class TuningConfig(DataObjectBase):
     # num_layers: int # Optional - The number of layers in the base transformer model
     #
     # encoder_hidden_size: int # Optional -  The hidden size of the prompt encoder.
+
+
+@caikit.core.dataobject(package="caikit_data_model.caikit_nlp")
+class DecodingParameters(DataObjectBase):
+    @dataobject
+    class ExponentialDecayLengthPenalty(DataObjectBase):
+        start_index: int
+        decay_factor: float
+
+    repetition_penalty: float
+    exponential_decay_length_penalty: ExponentialDecayLengthPenalty
+
+
+@caikit.core.dataobject(package="caikit_data_model.caikit_nlp")
+class SamplingParameters(DataObjectBase):
+
+    temperature: float
+    top_k: int
+    top_p: int
+    typical_p: float
+    seed: Optional[int]
+
+
+@caikit.core.dataobject(package="caikit_data_model.caikit_nlp")
+class StoppingCriteria(DataObjectBase):
+
+    max_new_tokens: int
+    min_new_tokens: int
+    time_limit_millis: int
+    stop_sequences: List[str]
diff --git a/tests/data_model/test_generation.py b/tests/data_model/test_generation.py
new file mode 100644
index 00000000..b2630745
--- /dev/null
+++ b/tests/data_model/test_generation.py
@@ -0,0 +1,113 @@
+# Copyright The Caikit Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Local
+from caikit_nlp.data_model import (
+    DecodingParameters,
+    SamplingParameters,
+    StoppingCriteria,
+)
+
+## Setup #########################################################################
+
+dummy_exponential_decay_length_penalty = (
+    DecodingParameters.ExponentialDecayLengthPenalty(start_index=1, decay_factor=0.95)
+)
+dummy_sampling_parameters = DecodingParameters(
+    repetition_penalty=1.2,
+    exponential_decay_length_penalty=dummy_exponential_decay_length_penalty,
+)
+
+dummy_sampling_parameters = SamplingParameters(
+    temperature=0.5, top_k=0, top_p=0, typical_p=0.2, seed=42
+)
+
+dummy_stopping_criteria = StoppingCriteria(
+    max_new_tokens=200, min_new_tokens=50, time_limit_millis=0, stop_sequences=["Test"]
+)
+
+## Tests ########################################################################
+
+### Decoding Parameters
+def test_sampling_parameters_all_fields_accessible():
+    assert dummy_sampling_parameters.repetition_penalty == 1.2
+    assert dummy_sampling_parameters.exponential_decay_length_penalty.start_index == 1
+    assert (
+        dummy_sampling_parameters.exponential_decay_length_penalty.decay_factor == 0.95
+    )
+
+
+def test_sampling_parameters_from_proto_and_back():
+    new = DecodingParameters.from_proto(dummy_sampling_parameters.to_proto())
+    assert new.repetition_penalty == 1.2
+    assert new.exponential_decay_length_penalty.start_index == 1
+    assert new.exponential_decay_length_penalty.decay_factor == 0.95
+
+
+def test_sampling_parameters_from_json_and_back():
+    new = DecodingParameters.from_json(dummy_sampling_parameters.to_json())
+    assert new.repetition_penalty == 1.2
+    assert new.exponential_decay_length_penalty.start_index == 1
+    assert new.exponential_decay_length_penalty.decay_factor == 0.95
+
+
+### Sampling Parameters
+def test_sampling_parameters_all_fields_accessible():
+    assert dummy_sampling_parameters.temperature == 0.5
+    assert dummy_sampling_parameters.top_k == 0
+    assert dummy_sampling_parameters.top_p == 0
+    assert dummy_sampling_parameters.typical_p == 0.2
+    assert dummy_sampling_parameters.seed == 42
+
+
+def test_sampling_parameters_from_proto_and_back():
+    new = SamplingParameters.from_proto(dummy_sampling_parameters.to_proto())
+    assert new.temperature == 0.5
+    assert new.top_k == 0
+    assert new.top_p == 0
+    assert new.typical_p == 0.2
+    assert new.seed == 42
+
+
+def test_sampling_parameters_from_json_and_back():
+    new = SamplingParameters.from_json(dummy_sampling_parameters.to_json())
+    assert new.temperature == 0.5
+    assert new.top_k == 0
+    assert new.top_p == 0
+    assert new.typical_p == 0.2
+    assert new.seed == 42
+
+
+### Stopping Criteria
+def test_stopping_criteria_all_fields_accessible():
+    assert dummy_stopping_criteria.max_new_tokens == 200
+    assert dummy_stopping_criteria.min_new_tokens == 50
+    assert dummy_stopping_criteria.time_limit_millis == 0
+    assert dummy_stopping_criteria.stop_sequences == ["Test"]
+
+
+def test_stopping_criteria_from_proto_and_back():
+    new = StoppingCriteria.from_proto(dummy_stopping_criteria.to_proto())
+    assert new.max_new_tokens == 200
+    assert new.min_new_tokens == 50
+    assert new.time_limit_millis == 0
+    assert new.stop_sequences == ["Test"]
+
+
+def test_stopping_criteria_from_json_and_back():
+    new = StoppingCriteria.from_json(dummy_stopping_criteria.to_json())
+    assert new.max_new_tokens == 200
+    assert new.min_new_tokens == 50
+    assert new.time_limit_millis == 0
+    assert new.stop_sequences == ["Test"]