diff --git a/codex-rs/core/src/codex.rs b/codex-rs/core/src/codex.rs
index 044ff38c62..04886f6b09 100644
--- a/codex-rs/core/src/codex.rs
+++ b/codex-rs/core/src/codex.rs
@@ -1157,22 +1157,6 @@ async fn submission_loop(
 
                 // Install the new persistent context for subsequent tasks/turns.
                 turn_context = Arc::new(new_turn_context);
-
-                // Optionally persist changes to model / effort
-                let effort_str = effort.map(|_| effective_effort.to_string());
-
-                if let Err(e) = persist_non_null_overrides(
-                    &config.codex_home,
-                    config.active_profile.as_deref(),
-                    &[
-                        (&[CONFIG_KEY_MODEL], model.as_deref()),
-                        (&[CONFIG_KEY_EFFORT], effort_str.as_deref()),
-                    ],
-                )
-                .await
-                {
-                    warn!("failed to persist overrides: {e:#}");
-                }
             }
             Op::UserInput { items } => {
                 submit_user_input(