Use current model for review (#9179)

Instead of having a hard-coded default review model, use the current
model for running `/review` unless one is specified in the config.

Also inherit current reasoning effort

codex-rs/core/src/codex.rs

@@ -2383,7 +2383,10 @@ async fn spawn_review_thread(
     sub_id: String,
     resolved: crate::review_prompts::ResolvedReviewRequest,
 ) {
-    let model = config.review_model.clone();
+    let model = config
+        .review_model
+        .clone()
+        .unwrap_or_else(|| parent_turn_context.client.get_model());
     let review_model_info = sess
         .services
         .models_manager
@@ -2407,14 +2410,13 @@ async fn spawn_review_thread(
 
     // Build per‑turn client with the requested model/family.
     let mut per_turn_config = (*config).clone();
-    per_turn_config.model_reasoning_effort = Some(ReasoningEffortConfig::Low);
-    per_turn_config.model_reasoning_summary = ReasoningSummaryConfig::Detailed;
+    per_turn_config.model = Some(model.clone());
     per_turn_config.features = review_features.clone();
 
-    let otel_manager = parent_turn_context.client.get_otel_manager().with_model(
-        config.review_model.as_str(),
-        review_model_info.slug.as_str(),
-    );
+    let otel_manager = parent_turn_context
+        .client
+        .get_otel_manager()
+        .with_model(model.as_str(), review_model_info.slug.as_str());
 
     let per_turn_config = Arc::new(per_turn_config);
     let client = ModelClient::new(

codex-rs/core/src/config/mod.rs

@@ -76,8 +76,6 @@ pub use constraint::ConstraintResult;
 pub use service::ConfigService;
 pub use service::ConfigServiceError;
 
-const OPENAI_DEFAULT_REVIEW_MODEL: &str = "gpt-5.1-codex-max";
-
 pub use codex_git::GhostSnapshotConfig;
 
 /// Maximum number of bytes of the documentation that will be embedded. Larger
@@ -108,8 +106,8 @@ pub struct Config {
     /// Optional override of model selection.
     pub model: Option<String>,
 
-    /// Model used specifically for review sessions. Defaults to "gpt-5.1-codex-max".
-    pub review_model: String,
+    /// Model used specifically for review sessions.
+    pub review_model: Option<String>,
 
     /// Size of the context window for the model, in tokens.
     pub model_context_window: Option<i64>,
@@ -1413,10 +1411,7 @@ impl Config {
         )?;
         let compact_prompt = compact_prompt.or(file_compact_prompt);
 
-        // Default review model when not set in config; allow CLI override to take precedence.
-        let review_model = override_review_model
-            .or(cfg.review_model)
-            .unwrap_or_else(default_review_model);
+        let review_model = override_review_model.or(cfg.review_model);
 
         let check_for_update_on_startup = cfg.check_for_update_on_startup.unwrap_or(true);
 
@@ -1647,10 +1642,6 @@ impl Config {
     }
 }
 
-fn default_review_model() -> String {
-    OPENAI_DEFAULT_REVIEW_MODEL.to_string()
-}
-
 /// Returns the path to the Codex configuration directory, which can be
 /// specified by the `CODEX_HOME` environment variable. If not set, defaults to
 /// `~/.codex`.
@@ -3486,7 +3477,7 @@ model_verbosity = "high"
         assert_eq!(
             Config {
                 model: Some("o3".to_string()),
-                review_model: OPENAI_DEFAULT_REVIEW_MODEL.to_string(),
+                review_model: None,
                 model_context_window: None,
                 model_auto_compact_token_limit: None,
                 model_provider_id: "openai".to_string(),
@@ -3573,7 +3564,7 @@ model_verbosity = "high"
         )?;
         let expected_gpt3_profile_config = Config {
             model: Some("gpt-3.5-turbo".to_string()),
-            review_model: OPENAI_DEFAULT_REVIEW_MODEL.to_string(),
+            review_model: None,
             model_context_window: None,
             model_auto_compact_token_limit: None,
             model_provider_id: "openai-chat-completions".to_string(),
@@ -3675,7 +3666,7 @@ model_verbosity = "high"
         )?;
         let expected_zdr_profile_config = Config {
             model: Some("o3".to_string()),
-            review_model: OPENAI_DEFAULT_REVIEW_MODEL.to_string(),
+            review_model: None,
             model_context_window: None,
             model_auto_compact_token_limit: None,
             model_provider_id: "openai".to_string(),
@@ -3763,7 +3754,7 @@ model_verbosity = "high"
         )?;
         let expected_gpt5_profile_config = Config {
             model: Some("gpt-5.1".to_string()),
-            review_model: OPENAI_DEFAULT_REVIEW_MODEL.to_string(),
+            review_model: None,
             model_context_window: None,
             model_auto_compact_token_limit: None,
             model_provider_id: "openai".to_string(),

codex-rs/core/src/tasks/review.rs

@@ -92,7 +92,11 @@ async fn start_review_conversation(
     // Set explicit review rubric for the sub-agent
     sub_agent_config.base_instructions = Some(crate::REVIEW_PROMPT.to_string());
 
-    sub_agent_config.model = Some(config.review_model.clone());
+    let model = config
+        .review_model
+        .clone()
+        .unwrap_or_else(|| ctx.client.get_model());
+    sub_agent_config.model = Some(model);
     (run_codex_thread_one_shot(
         sub_agent_config,
         session.auth_manager(),