diff --git a/configs/config.yaml b/configs/config.yaml
index f3c19a2..bb12734 100644
--- a/configs/config.yaml
+++ b/configs/config.yaml
@@ -4,7 +4,7 @@
 # Provider settings
 vlm:
   provider: gemini
-  model: gemini-2.0-flash
+  model: gemini-2.5-flash
 
 image:
   provider: google_imagen
diff --git a/configs/provider/vlm/gemini.yaml b/configs/provider/vlm/gemini.yaml
index a1eeb20..1e40426 100644
--- a/configs/provider/vlm/gemini.yaml
+++ b/configs/provider/vlm/gemini.yaml
@@ -7,7 +7,7 @@ capabilities:
   - vision_input
   - json_mode
 config:
-  model: gemini-2.0-flash
+  model: gemini-2.5-flash
   api_key: ${GOOGLE_API_KEY}
   temperature: 1.0
   max_tokens: 4096
diff --git a/examples/generate_diagram.py b/examples/generate_diagram.py
index b5a85ee..26ce691 100644
--- a/examples/generate_diagram.py
+++ b/examples/generate_diagram.py
@@ -39,7 +39,7 @@ async def main():
 
     settings = Settings(
         vlm_provider="gemini",
-        vlm_model="gemini-2.0-flash",
+        vlm_model="gemini-2.5-flash",
         image_provider="google_imagen",
         image_model="gemini-3-pro-image-preview",
         refinement_iterations=2,
diff --git a/paperbanana/core/config.py b/paperbanana/core/config.py
index 7bc6bed..547ffa7 100644
--- a/paperbanana/core/config.py
+++ b/paperbanana/core/config.py
@@ -16,7 +16,7 @@ class VLMConfig(BaseSettings):
     """VLM provider configuration."""
 
     provider: str = "gemini"
-    model: str = "gemini-2.0-flash"
+    model: str = "gemini-2.5-flash"
 
 
 class ImageConfig(BaseSettings):
@@ -57,7 +57,7 @@ class Settings(BaseSettings):
 
     # Provider settings
     vlm_provider: str = Field(default="gemini", alias="VLM_PROVIDER")
-    vlm_model: str = Field(default="gemini-2.0-flash", alias="VLM_MODEL")
+    vlm_model: str = Field(default="gemini-2.5-flash", alias="VLM_MODEL")
     image_provider: str = Field(default="google_imagen", alias="IMAGE_PROVIDER")
     image_model: str = Field(default="gemini-3-pro-image-preview", alias="IMAGE_MODEL")
 
diff --git a/paperbanana/providers/vlm/gemini.py b/paperbanana/providers/vlm/gemini.py
index f516e10..662917b 100644
--- a/paperbanana/providers/vlm/gemini.py
+++ b/paperbanana/providers/vlm/gemini.py
@@ -20,7 +20,7 @@ class GeminiVLM(VLMProvider):
     Free tier: https://makersuite.google.com/app/apikey
     """
 
-    def __init__(self, api_key: Optional[str] = None, model: str = "gemini-2.0-flash"):
+    def __init__(self, api_key: Optional[str] = None, model: str = "gemini-2.5-flash"):
         self._api_key = api_key
         self._model = model
         self._client = None
diff --git a/tests/test_providers/test_registry.py b/tests/test_providers/test_registry.py
index a60ab25..7faecd3 100644
--- a/tests/test_providers/test_registry.py
+++ b/tests/test_providers/test_registry.py
@@ -12,12 +12,12 @@ def test_create_gemini_vlm():
     """Test creating a Gemini VLM provider."""
     settings = Settings(
         vlm_provider="gemini",
-        vlm_model="gemini-2.0-flash",
+        vlm_model="gemini-2.5-flash",
         google_api_key="test-key",
     )
     vlm = ProviderRegistry.create_vlm(settings)
     assert vlm.name == "gemini"
-    assert vlm.model_name == "gemini-2.0-flash"
+    assert vlm.model_name == "gemini-2.5-flash"
 
 
 def test_create_google_imagen_gen():