diff --git a/reginaldCog/openai_completion.py b/reginaldCog/openai_completion.py
index b63b580..04b31df 100644
--- a/reginaldCog/openai_completion.py
+++ b/reginaldCog/openai_completion.py
@@ -34,9 +34,6 @@ class Completion:
                 "model": self.__model,
                 "messages": self.__messages,
                 "max_completion_tokens": 2000,
-                "temperature": 0.7,
-                "presence_penalty": 0.5,
-                "frequency_penalty": 0.5,
                 "tools": TOOLS,
                 "tool_choice": "auto",
             }
diff --git a/reginaldCog/reginald.py b/reginaldCog/reginald.py
index bbe676d..34bbd05 100644
--- a/reginaldCog/reginald.py
+++ b/reginaldCog/reginald.py
@@ -23,7 +23,6 @@ CALLABLE_FUNCTIONS = {
 
 DEFAULT_MODEL = "gpt-5-mini-2025-08-07"
 DEFAULT_MAX_COMPLETION_TOKENS = 2000
-DEFAULT_TEMPERATURE = 0.7
 
 
 class ReginaldCog(PermissionsMixin, BlacklistMixin, MemoryMixin, commands.Cog):
@@ -223,9 +222,10 @@ class ReginaldCog(PermissionsMixin, BlacklistMixin, MemoryMixin, commands.Cog):
             completion_args = {
                 "model": model,
                 "messages": messages,
-                # `max_completion_tokens` is the recommended limit field for modern/reasoning models.
+                # Keep modern token cap field and rely on model defaults for sampling controls.
+                # GPT-5 family compatibility notes: temperature/top_p/logprobs are not universally
+                # accepted across snapshots/reasoning settings.
                 "max_completion_tokens": DEFAULT_MAX_COMPLETION_TOKENS,
-                "temperature": DEFAULT_TEMPERATURE,
                 "tools": TOOLS,
                 "tool_choice": "auto",
             }