diff --git a/src/cortex-cli/src/stats_cmd.rs b/src/cortex-cli/src/stats_cmd.rs
index 1e40750..590d238 100644
--- a/src/cortex-cli/src/stats_cmd.rs
+++ b/src/cortex-cli/src/stats_cmd.rs
@@ -120,7 +120,6 @@ fn load_custom_pricing() -> std::collections::HashMap<String, ModelPricing> {
     // Example: CORTEX_PRICING_GPT4O=2.5,10.0
     for (key, value) in std::env::vars() {
         if let Some(model_suffix) = key.strip_prefix("CORTEX_PRICING_") {
-            let model_name = model_suffix.to_lowercase().replace('_', "-");
             let parts: Vec<&str> = value.split(',').collect();
             if parts.len() == 2
                 && let (Ok(input), Ok(output)) = (
@@ -128,13 +127,13 @@ fn load_custom_pricing() -> std::collections::HashMap<String, ModelPricing> {
                     parts[1].trim().parse::<f64>(),
                 )
             {
-                custom.insert(
-                    model_name,
-                    ModelPricing {
-                        input_per_million: input,
-                        output_per_million: output,
-                    },
-                );
+                let pricing = ModelPricing {
+                    input_per_million: input,
+                    output_per_million: output,
+                };
+                for model_name in model_names_from_env_suffix(model_suffix) {
+                    custom.insert(model_name, pricing.clone());
+                }
             }
         }
     }
@@ -142,6 +141,36 @@ fn load_custom_pricing() -> std::collections::HashMap<String, ModelPricing> {
     custom
 }
 
+/// Convert CORTEX_PRICING suffixes into model lookup keys.
+///
+/// Supports:
+/// - Legacy style: `GPT_4O` -> `gpt-4o`
+/// - Provider/model style: `OPENAI_GPT_4O` -> `openai/gpt-4o`
+/// - Explicit slash style: `OPENAI__GPT_4O` -> `openai/gpt-4o`
+fn model_names_from_env_suffix(model_suffix: &str) -> Vec<String> {
+    let lower = model_suffix.to_lowercase();
+    let mut names = vec![lower.replace('_', "-")];
+
+    // First underscore as provider/model separator:
+    // OPENAI_GPT_4O -> openai/gpt-4o
+    if let Some((provider, rest)) = lower.split_once('_')
+        && !provider.is_empty()
+        && !rest.is_empty()
+    {
+        names.push(format!("{}/{}", provider, rest.replace('_', "-")));
+    }
+
+    // Double underscore explicitly encodes slash:
+    // OPENAI__GPT_4O -> openai/gpt-4o
+    if lower.contains("__") {
+        names.push(lower.replace("__", "/").replace('_', "-"));
+    }
+
+    names.sort();
+    names.dedup();
+    names
+}
+
 impl StatsCli {
     /// Run the stats command.
     pub async fn run(self) -> Result<()> {
@@ -755,4 +784,17 @@ mod tests {
         let err = validate_days_range("abc").unwrap_err();
         assert!(err.contains("not a valid number"));
     }
+
+    #[test]
+    fn test_model_names_from_env_suffix_provider_model_mapping() {
+        let names = model_names_from_env_suffix("OPENAI_GPT_4O");
+        assert!(names.contains(&"openai-gpt-4o".to_string()));
+        assert!(names.contains(&"openai/gpt-4o".to_string()));
+    }
+
+    #[test]
+    fn test_model_names_from_env_suffix_explicit_slash_mapping() {
+        let names = model_names_from_env_suffix("OPENAI__GPT_4O");
+        assert!(names.contains(&"openai/gpt-4o".to_string()));
+    }
 }