diff --git a/config/config.yaml b/config/config.yaml
deleted file mode 100644
index 311fd3eb..00000000
--- a/config/config.yaml
+++ /dev/null
@@ -1,33 +0,0 @@
-server:
-  port: "${PORT:-8080}"
-
-providers:
-  openai-primary:
-    type: "openai"
-    api_key: "${OPENAI_API_KEY}"
-
-  anthropic-primary:
-    type: "anthropic"
-    api_key: "${ANTHROPIC_API_KEY}"
-
-  gemini-primary:
-    type: "gemini"
-    api_key: "${GEMINI_API_KEY}"
-
-  # Example: Groq (OpenAI-compatible)
-  # groq:
-  #   type: "openai"
-  #   base_url: "https://api.groq.com/openai/v1"
-  #   api_key: "${GROQ_API_KEY}"
-
-  # Example: Azure OpenAI
-  # azure-openai:
-  #   type: "openai"
-  #   base_url: "https://your-resource.openai.azure.com/openai/deployments/your-deployment"
-  #   api_key: "${AZURE_OPENAI_API_KEY}"
-
-  # Example: DeepSeek (OpenAI-compatible)
-  # deepseek:
-  #   type: "openai"
-  #   base_url: "https://api.deepseek.com/v1"
-  #   api_key: "${DEEPSEEK_API_KEY}"
diff --git a/internal/providers/anthropic/anthropic.go b/internal/providers/anthropic/anthropic.go
index 3823baf6..1c76f9ee 100644
--- a/internal/providers/anthropic/anthropic.go
+++ b/internal/providers/anthropic/anthropic.go
@@ -29,7 +29,7 @@ func init() {
 		p := New(cfg.APIKey)
 		// Override base URL if provided in config
 		if cfg.BaseURL != "" {
-			p.baseURL = cfg.BaseURL
+			p.SetBaseURL(cfg.BaseURL)
 		}
 		return p, nil
 	})
@@ -60,6 +60,11 @@ func NewWithHTTPClient(apiKey string, client *http.Client) *Provider {
 	}
 }
 
+// SetBaseURL allows configuring a custom base URL for the provider
+func (p *Provider) SetBaseURL(url string) {
+	p.baseURL = url
+}
+
 // Supports returns true if this provider can handle the given model
 func (p *Provider) Supports(model string) bool {
 	return strings.HasPrefix(model, "claude-")
diff --git a/internal/providers/gemini/gemini.go b/internal/providers/gemini/gemini.go
index d76abf5c..cf971aaa 100644
--- a/internal/providers/gemini/gemini.go
+++ b/internal/providers/gemini/gemini.go
@@ -29,7 +29,7 @@ func init() {
 		p := New(cfg.APIKey)
 		// Override base URL if provided in config
 		if cfg.BaseURL != "" {
-			p.baseURL = cfg.BaseURL
+			p.SetBaseURL(cfg.BaseURL)
 		}
 		return p, nil
 	})
@@ -63,6 +63,11 @@ func NewWithHTTPClient(apiKey string, client *http.Client) *Provider {
 	}
 }
 
+// SetBaseURL allows configuring a custom base URL for the provider
+func (p *Provider) SetBaseURL(url string) {
+	p.baseURL = url
+}
+
 // Supports returns true if this provider can handle the given model
 func (p *Provider) Supports(model string) bool {
 	return strings.HasPrefix(model, "gemini-")
diff --git a/internal/providers/openai/openai.go b/internal/providers/openai/openai.go
index 6674e57f..bba6c2d9 100644
--- a/internal/providers/openai/openai.go
+++ b/internal/providers/openai/openai.go
@@ -25,7 +25,7 @@ func init() {
 		p := New(cfg.APIKey)
 		// Override base URL if provided in config
 		if cfg.BaseURL != "" {
-			p.baseURL = cfg.BaseURL
+			p.SetBaseURL(cfg.BaseURL)
 		}
 		return p, nil
 	})
@@ -56,6 +56,11 @@ func NewWithHTTPClient(apiKey string, client *http.Client) *Provider {
 	}
 }
 
+// SetBaseURL allows configuring a custom base URL for the provider
+func (p *Provider) SetBaseURL(url string) {
+	p.baseURL = url
+}
+
 // Supports returns true if this provider can handle the given model
 func (p *Provider) Supports(model string) bool {
 	return strings.HasPrefix(model, "gpt-") || strings.HasPrefix(model, "o1")