diff --git a/providers/openai_provider.py b/providers/openai_provider.py
index dc0159a..2d3c0cd 100644
--- a/providers/openai_provider.py
+++ b/providers/openai_provider.py
@@ -53,11 +53,29 @@ class OpenAIModelProvider(OpenAICompatibleProvider):
             supports_json_mode=True,
             supports_images=True,  # GPT-5-mini supports vision
             max_image_size_mb=20.0,  # 20MB per OpenAI docs
-            supports_temperature=True,  # Regular models accept temperature parameter
+            supports_temperature=True,
             temperature_constraint=create_temperature_constraint("fixed"),
             description="GPT-5-mini (400K context, 128K output) - Efficient variant with reasoning support",
             aliases=["gpt5-mini", "gpt5mini", "mini"],
         ),
+        "gpt-5-nano": ModelCapabilities(
+            provider=ProviderType.OPENAI,
+            model_name="gpt-5-nano",
+            friendly_name="OpenAI (GPT-5 nano)",
+            context_window=400_000,
+            max_output_tokens=128_000,
+            supports_extended_thinking=True,
+            supports_system_prompts=True,
+            supports_streaming=True,
+            supports_function_calling=True,
+            supports_json_mode=True,
+            supports_images=True,
+            max_image_size_mb=20.0,
+            supports_temperature=True,
+            temperature_constraint=create_temperature_constraint("fixed"),
+            description="GPT-5 nano (400K context) - Fastest, cheapest version of GPT-5 for summarization and classification tasks",
+            aliases=["gpt5nano", "gpt5-nano", "nano"],
+        ),
         "o3": ModelCapabilities(
             provider=ProviderType.OPENAI,
             model_name="o3",