diff --git a/haystack/components/generators/chat/openai.py b/haystack/components/generators/chat/openai.py
index 9efd0fba65..4cf1823df2 100644
--- a/haystack/components/generators/chat/openai.py
+++ b/haystack/components/generators/chat/openai.py
@@ -97,8 +97,6 @@ class OpenAIChatGenerator:
     ```
     """
 
-    _HAYSTACK_TO_PROVIDER_GENERATION_KWARGS: ClassVar[dict[str, str]] = {"max_output_tokens": "max_completion_tokens"}
-
     SUPPORTED_MODELS: ClassVar[list[str]] = [
         "gpt-5-mini",
         "gpt-5-nano",
diff --git a/haystack/components/generators/chat/openai_responses.py b/haystack/components/generators/chat/openai_responses.py
index 3c2b4b8532..8509ad205a 100644
--- a/haystack/components/generators/chat/openai_responses.py
+++ b/haystack/components/generators/chat/openai_responses.py
@@ -74,8 +74,6 @@ class OpenAIResponsesChatGenerator:
     ```
     """
 
-    _HAYSTACK_TO_PROVIDER_GENERATION_KWARGS: ClassVar[dict[str, str]] = {"max_output_tokens": "max_output_tokens"}
-
     SUPPORTED_MODELS: ClassVar[list[str]] = [
         "gpt-5-mini",
         "gpt-5-nano",
diff --git a/haystack/components/generators/chat/utils.py b/haystack/components/generators/chat/utils.py
deleted file mode 100644
index 937e44978c..0000000000
--- a/haystack/components/generators/chat/utils.py
+++ /dev/null
@@ -1,41 +0,0 @@
-# SPDX-FileCopyrightText: 2022-present deepset GmbH <info@deepset.ai>
-#
-# SPDX-License-Identifier: Apache-2.0
-
-from typing import Any
-
-from haystack.components.generators.chat.types import ChatGenerator
-
-# The provider-neutral generation parameters that Haystack components can request from Chat Generators.
-# The chosen name is based on OpenAI's Responses API.
-_HAYSTACK_GENERATION_PARAMETERS = frozenset({"max_output_tokens"})
-
-
-def _convert_haystack_generation_kwargs(
-    chat_generator: ChatGenerator, haystack_generation_kwargs: dict[str, Any]
-) -> dict[str, Any]:
-    """
-    Convert provider-neutral Haystack generation parameters for a Chat Generator.
-
-    Chat Generators advertise supported parameters through a private class-level mapping from the canonical Haystack
-    name to the provider-specific name. Parameters not advertised by the generator are omitted, allowing callers to
-    provide a fallback for generators that do not expose this optional capability.
-
-    :param chat_generator: The Chat Generator that will receive the converted parameters.
-    :param haystack_generation_kwargs: Generation parameters using Haystack's canonical names.
-    :returns: The supported parameters converted to their provider-specific names.
-    :raises ValueError: If a parameter is not part of Haystack's canonical vocabulary.
-    """
-    unknown_parameters = haystack_generation_kwargs.keys() - _HAYSTACK_GENERATION_PARAMETERS
-    if unknown_parameters:
-        unknown = ", ".join(sorted(unknown_parameters))
-        msg = f"Unknown Haystack generation parameter(s): {unknown}"
-        raise ValueError(msg)
-
-    parameter_mapping = getattr(chat_generator, "_HAYSTACK_TO_PROVIDER_GENERATION_KWARGS", {})
-
-    return {
-        provider_name: haystack_generation_kwargs[haystack_name]
-        for haystack_name, provider_name in parameter_mapping.items()
-        if haystack_name in haystack_generation_kwargs
-    }
diff --git a/test/components/generators/chat/test_azure.py b/test/components/generators/chat/test_azure.py
index 42c4908834..bfd6ae4a84 100644
--- a/test/components/generators/chat/test_azure.py
+++ b/test/components/generators/chat/test_azure.py
@@ -14,7 +14,7 @@
 
 import haystack.components.generators.chat.azure as azure_chat_module
 from haystack import Pipeline, component
-from haystack.components.generators.chat import AzureOpenAIChatGenerator, OpenAIChatGenerator
+from haystack.components.generators.chat import AzureOpenAIChatGenerator
 from haystack.components.generators.utils import print_streaming_chunk
 from haystack.dataclasses import ChatMessage, ToolCall
 from haystack.tools import ComponentTool, Tool
@@ -78,12 +78,6 @@ def tools():
 
 
 class TestAzureOpenAIChatGenerator:
-    def test_haystack_to_provider_generation_kwargs(self) -> None:
-        assert (
-            AzureOpenAIChatGenerator._HAYSTACK_TO_PROVIDER_GENERATION_KWARGS
-            is OpenAIChatGenerator._HAYSTACK_TO_PROVIDER_GENERATION_KWARGS
-        )
-
     def test_supported_models(self) -> None:
         """SUPPORTED_MODELS is a non-empty list of strings."""
         models = AzureOpenAIChatGenerator.SUPPORTED_MODELS
diff --git a/test/components/generators/chat/test_azure_responses.py b/test/components/generators/chat/test_azure_responses.py
index d0202b5147..5692954dd9 100644
--- a/test/components/generators/chat/test_azure_responses.py
+++ b/test/components/generators/chat/test_azure_responses.py
@@ -11,7 +11,7 @@
 from pydantic import BaseModel
 
 from haystack import Pipeline, component
-from haystack.components.generators.chat import AzureOpenAIResponsesChatGenerator, OpenAIResponsesChatGenerator
+from haystack.components.generators.chat import AzureOpenAIResponsesChatGenerator
 from haystack.components.generators.utils import print_streaming_chunk
 from haystack.dataclasses import ChatMessage, ToolCall
 from haystack.tools import ComponentTool, Tool
@@ -75,12 +75,6 @@ def tools():
 
 
 class TestInitialization:
-    def test_haystack_to_provider_generation_kwargs(self) -> None:
-        assert (
-            AzureOpenAIResponsesChatGenerator._HAYSTACK_TO_PROVIDER_GENERATION_KWARGS
-            is OpenAIResponsesChatGenerator._HAYSTACK_TO_PROVIDER_GENERATION_KWARGS
-        )
-
     def test_supported_models(self) -> None:
         """SUPPORTED_MODELS is a non-empty list of strings."""
         models = AzureOpenAIResponsesChatGenerator.SUPPORTED_MODELS
diff --git a/test/components/generators/chat/test_openai.py b/test/components/generators/chat/test_openai.py
index dfe6c94b34..c33c1a1ed9 100644
--- a/test/components/generators/chat/test_openai.py
+++ b/test/components/generators/chat/test_openai.py
@@ -190,11 +190,6 @@ def tools():
 
 
 class TestOpenAIChatGenerator:
-    def test_haystack_to_provider_generation_kwargs(self) -> None:
-        assert OpenAIChatGenerator._HAYSTACK_TO_PROVIDER_GENERATION_KWARGS == {
-            "max_output_tokens": "max_completion_tokens"
-        }
-
     def test_supported_models(self) -> None:
         """SUPPORTED_MODELS is a non-empty list of strings."""
         models = OpenAIChatGenerator.SUPPORTED_MODELS
diff --git a/test/components/generators/chat/test_openai_responses.py b/test/components/generators/chat/test_openai_responses.py
index b715ad1fee..16b8d09cb2 100644
--- a/test/components/generators/chat/test_openai_responses.py
+++ b/test/components/generators/chat/test_openai_responses.py
@@ -104,11 +104,6 @@ def __call__(self, chunk: StreamingChunk) -> None:
 
 
 class TestInitialization:
-    def test_haystack_to_provider_generation_kwargs(self) -> None:
-        assert OpenAIResponsesChatGenerator._HAYSTACK_TO_PROVIDER_GENERATION_KWARGS == {
-            "max_output_tokens": "max_output_tokens"
-        }
-
     def test_supported_models(self) -> None:
         """SUPPORTED_MODELS is a non-empty list of strings."""
         models = OpenAIResponsesChatGenerator.SUPPORTED_MODELS
diff --git a/test/components/generators/chat/test_utils.py b/test/components/generators/chat/test_utils.py
deleted file mode 100644
index 1661a4860d..0000000000
--- a/test/components/generators/chat/test_utils.py
+++ /dev/null
@@ -1,33 +0,0 @@
-# SPDX-FileCopyrightText: 2022-present deepset GmbH <info@deepset.ai>
-#
-# SPDX-License-Identifier: Apache-2.0
-
-from typing import ClassVar
-
-import pytest
-
-from haystack.components.generators.chat import MockChatGenerator
-from haystack.components.generators.chat.utils import (
-    _HAYSTACK_GENERATION_PARAMETERS,
-    _convert_haystack_generation_kwargs,
-)
-
-
-class MappedMockChatGenerator(MockChatGenerator):
-    _HAYSTACK_TO_PROVIDER_GENERATION_KWARGS: ClassVar[dict[str, str]] = {"max_output_tokens": "provider_max_tokens"}
-
-
-class TestConvertHaystackGenerationKwargs:
-    def test_haystack_generation_parameters(self) -> None:
-        assert {"max_output_tokens"} == _HAYSTACK_GENERATION_PARAMETERS
-
-    def test_conversion(self) -> None:
-        converted = _convert_haystack_generation_kwargs(MappedMockChatGenerator(), {"max_output_tokens": 100})
-        assert converted == {"provider_max_tokens": 100}
-
-    def test_no_mapping(self) -> None:
-        assert _convert_haystack_generation_kwargs(MockChatGenerator(), {"max_output_tokens": 100}) == {}
-
-    def test_invalid_parameter(self) -> None:
-        with pytest.raises(ValueError, match="Unknown Haystack generation parameter\\(s\\): max_tokens"):
-            _convert_haystack_generation_kwargs(MockChatGenerator(), {"max_tokens": 100})