diff --git a/src/providers/codex/translate/model_allowlist.rs b/src/providers/codex/translate/model_allowlist.rs
index bb4c0629..94c2d7af 100644
--- a/src/providers/codex/translate/model_allowlist.rs
+++ b/src/providers/codex/translate/model_allowlist.rs
@@ -14,6 +14,7 @@ pub const ALLOWED_MODELS: &[&str] = &[
     "gpt-5.6-luna",
     "gpt-5.6-sol",
     "gpt-5.6-terra",
+    "gpt-daybreak-blue",
 ];
 
 pub const MODEL_ALIASES: &[(&str, &str)] = &[
@@ -117,7 +118,10 @@ pub fn assert_allowed_model(model: &str) -> Result<(), ModelNotAllowedError> {
 }
 
 pub fn uses_responses_lite(model: &str) -> bool {
-    matches!(model, "gpt-5.6-luna" | "gpt-5.6-sol" | "gpt-5.6-terra")
+    matches!(
+        model,
+        "gpt-5.6-luna" | "gpt-5.6-sol" | "gpt-5.6-terra" | "gpt-daybreak-blue"
+    )
 }
 
 /// `gpt-5.6-luna` exists only behind the Responses Lite lane; the full
diff --git a/src/registry.rs b/src/registry.rs
index 77a9cf67..dc5dcac3 100644
--- a/src/registry.rs
+++ b/src/registry.rs
@@ -47,6 +47,7 @@ pub(crate) const CODEX_MODELS: &[&str] = &[
     "gpt-5.6-luna",
     "gpt-5.6-sol",
     "gpt-5.6-terra",
+    "gpt-daybreak-blue",
 ];
 
 pub(crate) const KIMI_MODELS: &[&str] = &["kimi-for-coding", "kimi-k2.6", "kimi-k3", "k2.6", "k3"];