diff --git a/providers/openai_provider.py b/providers/openai_provider.py
index 2d3c0cd..e9bbb6e 100644
--- a/providers/openai_provider.py
+++ b/providers/openai_provider.py
@@ -38,7 +38,7 @@ class OpenAIModelProvider(OpenAICompatibleProvider):
             supports_temperature=True,  # Regular models accept temperature parameter
             temperature_constraint=create_temperature_constraint("fixed"),
             description="GPT-5 (400K context, 128K output) - Advanced model with reasoning support",
-            aliases=["gpt5", "gpt-5"],
+            aliases=["gpt5"],
         ),
         "gpt-5-mini": ModelCapabilities(
             provider=ProviderType.OPENAI,
@@ -110,7 +110,7 @@ class OpenAIModelProvider(OpenAICompatibleProvider):
             supports_temperature=False,  # O3 models don't accept temperature parameter
             temperature_constraint=create_temperature_constraint("fixed"),
             description="Fast O3 variant (200K context) - Balanced performance/speed, moderate complexity",
-            aliases=["o3mini", "o3-mini"],
+            aliases=["o3mini"],
         ),
         "o3-pro": ModelCapabilities(
             provider=ProviderType.OPENAI,
@@ -128,7 +128,7 @@ class OpenAIModelProvider(OpenAICompatibleProvider):
             supports_temperature=False,  # O3 models don't accept temperature parameter
             temperature_constraint=create_temperature_constraint("fixed"),
             description="Professional-grade reasoning (200K context) - EXTREMELY EXPENSIVE: Only for the most complex problems requiring universe-scale complexity analysis OR when the user explicitly asks for this model. Use sparingly for critical architectural decisions or exceptionally complex debugging that other models cannot handle.",
-            aliases=["o3-pro"],
+            aliases=["o3pro"],
         ),
         "o4-mini": ModelCapabilities(
             provider=ProviderType.OPENAI,
@@ -146,7 +146,7 @@ class OpenAIModelProvider(OpenAICompatibleProvider):
             supports_temperature=False,  # O4 models don't accept temperature parameter
             temperature_constraint=create_temperature_constraint("fixed"),
             description="Latest reasoning model (200K context) - Optimized for shorter contexts, rapid reasoning",
-            aliases=["o4mini", "o4-mini"],
+            aliases=["o4mini"],
         ),
         "gpt-4.1": ModelCapabilities(
             provider=ProviderType.OPENAI,
@@ -164,7 +164,7 @@ class OpenAIModelProvider(OpenAICompatibleProvider):
             supports_temperature=True,  # Regular models accept temperature parameter
             temperature_constraint=create_temperature_constraint("range"),
             description="GPT-4.1 (1M context) - Advanced reasoning model with large context window",
-            aliases=["gpt4.1", "gpt-4.1"],
+            aliases=["gpt4.1"],
         ),
     }
 
diff --git a/tests/test_supported_models_aliases.py b/tests/test_supported_models_aliases.py
index 256eaaf..336368b 100644
--- a/tests/test_supported_models_aliases.py
+++ b/tests/test_supported_models_aliases.py
@@ -50,15 +50,15 @@ class TestSupportedModelsAliases:
         # "mini" is now an alias for gpt-5-mini, not o4-mini
         assert "mini" in provider.SUPPORTED_MODELS["gpt-5-mini"].aliases
         assert "o4mini" in provider.SUPPORTED_MODELS["o4-mini"].aliases
-        assert "o4-mini" in provider.SUPPORTED_MODELS["o4-mini"].aliases
+        # o4-mini is no longer in its own aliases (removed self-reference)
         assert "o3mini" in provider.SUPPORTED_MODELS["o3-mini"].aliases
-        assert "o3-pro" in provider.SUPPORTED_MODELS["o3-pro"].aliases
+        assert "o3pro" in provider.SUPPORTED_MODELS["o3-pro"].aliases
         assert "gpt4.1" in provider.SUPPORTED_MODELS["gpt-4.1"].aliases
 
         # Test alias resolution
         assert provider._resolve_model_name("mini") == "gpt-5-mini"  # mini -> gpt-5-mini now
         assert provider._resolve_model_name("o3mini") == "o3-mini"
-        assert provider._resolve_model_name("o3-pro") == "o3-pro"  # o3-pro is already the base model name
+        assert provider._resolve_model_name("o3pro") == "o3-pro"  # o3pro resolves to o3-pro
         assert provider._resolve_model_name("o4mini") == "o4-mini"
         assert provider._resolve_model_name("gpt4.1") == "gpt-4.1"  # gpt4.1 resolves to gpt-4.1
 
diff --git a/tools/listmodels.py b/tools/listmodels.py
index 7fa0c90..4d17062 100644
--- a/tools/listmodels.py
+++ b/tools/listmodels.py
@@ -138,7 +138,9 @@ class ListModelsTool(BaseTool):
                 for model_name, capabilities in provider.get_model_configurations().items():
                     if capabilities.aliases:
                         for alias in capabilities.aliases:
-                            aliases.append(f"- `{alias}` → `{model_name}`")
+                            # Skip aliases that are the same as the model name to avoid duplicates
+                            if alias != model_name:
+                                aliases.append(f"- `{alias}` → `{model_name}`")
 
                 if aliases:
                     output_lines.append("\n**Aliases**:")