diff --git a/crates/forge_domain/src/provider.rs b/crates/forge_domain/src/provider.rs
index a65b43e416..be7498c7e2 100644
--- a/crates/forge_domain/src/provider.rs
+++ b/crates/forge_domain/src/provider.rs
@@ -73,6 +73,7 @@ impl ProviderId {
     pub const FIREWORKS_AI: ProviderId = ProviderId(Cow::Borrowed("fireworks-ai"));
     pub const NOVITA: ProviderId = ProviderId(Cow::Borrowed("novita"));
     pub const GOOGLE_AI_STUDIO: ProviderId = ProviderId(Cow::Borrowed("google_ai_studio"));
+    pub const MODAL: ProviderId = ProviderId(Cow::Borrowed("modal"));
 
     /// Returns all built-in provider IDs
     ///
@@ -106,6 +107,7 @@ impl ProviderId {
             ProviderId::FIREWORKS_AI,
             ProviderId::NOVITA,
             ProviderId::GOOGLE_AI_STUDIO,
+            ProviderId::MODAL,
         ]
     }
 
@@ -132,6 +134,7 @@ impl ProviderId {
             "fireworks-ai" => "FireworksAI".to_string(),
             "novita" => "Novita".to_string(),
             "google_ai_studio" => "GoogleAIStudio".to_string(),
+            "modal" => "Modal".to_string(),
             _ => {
                 // For other providers, use UpperCamelCase conversion
                 use convert_case::{Case, Casing};
@@ -177,6 +180,7 @@ impl std::str::FromStr for ProviderId {
             "fireworks-ai" => ProviderId::FIREWORKS_AI,
             "novita" => ProviderId::NOVITA,
             "google_ai_studio" => ProviderId::GOOGLE_AI_STUDIO,
+            "modal" => ProviderId::MODAL,
             // For custom providers, use Cow::Owned to avoid memory leaks
             custom => ProviderId(Cow::Owned(custom.to_string())),
         };
@@ -581,6 +585,24 @@ mod tests {
         assert_eq!(actual, expected);
     }
 
+    #[test]
+    fn test_modal_from_str() {
+        let actual = ProviderId::from_str("modal").unwrap();
+        let expected = ProviderId::MODAL;
+        assert_eq!(actual, expected);
+    }
+
+    #[test]
+    fn test_modal_display_name() {
+        assert_eq!(ProviderId::MODAL.to_string(), "Modal");
+    }
+
+    #[test]
+    fn test_modal_in_built_in_providers() {
+        let built_in = ProviderId::built_in_providers();
+        assert!(built_in.contains(&ProviderId::MODAL));
+    }
+
     #[test]
     fn test_io_intelligence() {
         let fixture = "test_key";
diff --git a/crates/forge_repo/src/provider/provider.json b/crates/forge_repo/src/provider/provider.json
index 16dc7899f6..e0f6f9d24d 100644
--- a/crates/forge_repo/src/provider/provider.json
+++ b/crates/forge_repo/src/provider/provider.json
@@ -3099,5 +3099,25 @@
         "input_modalities": ["text"]
       }
     ]
+  },
+  {
+    "id": "modal",
+    "api_key_vars": "MODAL_API_KEY",
+    "url_param_vars": [],
+    "response_type": "OpenAI",
+    "url": "https://api.us-west-2.modal.direct/v1/chat/completions",
+    "models": [
+      {
+        "id": "zai-org/GLM-5-FP8",
+        "name": "GLM-5",
+        "description": "Z.ai's 745B parameter flagship open-source MoE model for long-horizon agents and systems engineering, hosted on Modal",
+        "context_length": 192000,
+        "tools_supported": true,
+        "supports_parallel_tool_calls": true,
+        "supports_reasoning": true,
+        "input_modalities": ["text"]
+      }
+    ],
+    "auth_methods": ["api_key"]
   }
 ]