diff --git a/codex-rs/core/src/client.rs b/codex-rs/core/src/client.rs
index cc40ef42..a947e342 100644
--- a/codex-rs/core/src/client.rs
+++ b/codex-rs/core/src/client.rs
@@ -223,18 +223,14 @@ impl ModelClient {
 
         let input_with_instructions = prompt.get_formatted_input();
 
-        let verbosity = match &self.config.model_family.family {
-            family if family == "gpt-5" => self.config.model_verbosity,
-            _ => {
-                if self.config.model_verbosity.is_some() {
-                    warn!(
-                        "model_verbosity is set but ignored for non-gpt-5 model family: {}",
-                        self.config.model_family.family
-                    );
-                }
-
-                None
-            }
+        let verbosity = if self.config.model_family.support_verbosity {
+            self.config.model_verbosity
+        } else {
+            warn!(
+                "model_verbosity is set but ignored as the model does not support verbosity: {}",
+                self.config.model_family.family
+            );
+            None
         };
 
         // Only include `text.verbosity` for GPT-5 family models
diff --git a/codex-rs/core/src/model_family.rs b/codex-rs/core/src/model_family.rs
index e6e5fbfd..76ed81b0 100644
--- a/codex-rs/core/src/model_family.rs
+++ b/codex-rs/core/src/model_family.rs
@@ -54,6 +54,9 @@ pub struct ModelFamily {
     /// This is applied when computing the effective context window seen by
     /// consumers.
     pub effective_context_window_percent: i64,
+
+    /// If the model family supports setting the verbosity level when using Responses API.
+    pub support_verbosity: bool,
 }
 
 macro_rules! model_family {
@@ -73,6 +76,7 @@ macro_rules! model_family {
             base_instructions: BASE_INSTRUCTIONS.to_string(),
             experimental_supported_tools: Vec::new(),
             effective_context_window_percent: 95,
+            support_verbosity: false,
         };
         // apply overrides
         $(
@@ -128,6 +132,7 @@ pub fn find_family_for_model(slug: &str) -> Option<ModelFamily> {
                 "test_sync_tool".to_string(),
             ],
             supports_parallel_tool_calls: true,
+            support_verbosity: true,
         )
 
     // Internal models.
@@ -144,6 +149,7 @@ pub fn find_family_for_model(slug: &str) -> Option<ModelFamily> {
                 "read_file".to_string(),
             ],
             supports_parallel_tool_calls: true,
+            support_verbosity: true,
         )
 
     // Production models.
@@ -154,12 +160,14 @@ pub fn find_family_for_model(slug: &str) -> Option<ModelFamily> {
             reasoning_summary_format: ReasoningSummaryFormat::Experimental,
             base_instructions: GPT_5_CODEX_INSTRUCTIONS.to_string(),
             apply_patch_tool_type: Some(ApplyPatchToolType::Freeform),
+            support_verbosity: true,
         )
     } else if slug.starts_with("gpt-5") {
         model_family!(
             slug, "gpt-5",
             supports_reasoning_summaries: true,
             needs_special_apply_patch_instructions: true,
+            support_verbosity: true,
         )
     } else {
         None
@@ -179,5 +187,6 @@ pub fn derive_default_model_family(model: &str) -> ModelFamily {
         base_instructions: BASE_INSTRUCTIONS.to_string(),
         experimental_supported_tools: Vec::new(),
         effective_context_window_percent: 95,
+        support_verbosity: false,
     }
 }