diff --git a/src/api_interface/gem_api.rs b/src/api_interface/gem_api.rs
index 10f726f..981979d 100644
--- a/src/api_interface/gem_api.rs
+++ b/src/api_interface/gem_api.rs
@@ -12,15 +12,21 @@ pub struct GeminiExecutor {
     api_key: String,
     client: Client,
     max_tokens: i32,
+    temperature: f64,    // Add temperature parameter
+    top_k: i32,          // Add top_k parameter
+    logits: bool,        // Add logits parameter
 }
 
 impl GeminiExecutor {
-    pub fn new(model: String, api_key: String, max_tokens: i32) -> Self {
+    pub fn new(model: String, api_key: String, max_tokens: i32, temperature: f64, top_k: i32, logits: bool) -> Self {
         Self {
             model,
             api_key,
             client: Client::new(),
             max_tokens,
+            temperature,    // Initialize temperature
+            top_k,          // Initialize top_k
+            logits,         // Initialize logits
         }
     }
 
@@ -36,10 +42,10 @@ impl GeminiExecutor {
         );
 
         let mut generation_config = json!({
-            "temperature": 1.0,
+            "temperature": self.temperature,     // Use parameter
             "maxOutputTokens": self.max_tokens,
-            "topP": 0.8,
-            "topK": 10
+            "topP": if self.logits { 0.9 } else { 0.8 },  // Conditional based on logits
+            "topK": self.top_k                   // Use parameter
         });
 
         let contents: Vec<Value> = input
diff --git a/src/program/atomics.rs b/src/program/atomics.rs
index 5933abe..b7ccf8b 100644
--- a/src/program/atomics.rs
+++ b/src/program/atomics.rs
@@ -64,6 +64,9 @@ pub struct Config {
     pub custom_tools: Option<Vec<CustomToolTemplate>>,
     /// Maximum number of tokens for LLMs to generate per run.
     pub max_tokens: Option<i32>,
+    pub temperature: Option<f64>,   // Add temperature field
+    pub top_k: Option<i32>,         // Add top_k field
+    pub logits: Option<bool>,       // Add logits field
 }
 
 #[derive(Debug, Deserialize)]
diff --git a/src/program/executor.rs b/src/program/executor.rs
index a4d9473..c18f5f7 100644
--- a/src/program/executor.rs
+++ b/src/program/executor.rs
@@ -574,7 +574,10 @@ impl Executor {
             ModelProvider::Gemini => {
                 let api_key = std::env::var("GEMINI_API_KEY").expect("$GEMINI_API_KEY is not set");
                 let max_tokens = config.max_tokens.unwrap_or(800);
-                let executor = GeminiExecutor::new(self.model.to_string(), api_key, max_tokens);
+                let temperature = config.temperature.unwrap_or(1.0);  // Default value for temperature
+                let top_k = config.top_k.unwrap_or(10);                // Default value for top_k
+                let logits = config.logits.unwrap_or(false);           // Default value for logits
+                let executor = GeminiExecutor::new(self.model.to_string(), api_key, max_tokens, temperature, top_k, logits);
                 executor.generate_text(input, schema).await?
             }
             ModelProvider::OpenRouter => {
@@ -649,10 +652,13 @@ impl Executor {
             ModelProvider::Gemini => {
                 let api_key = std::env::var("GEMINI_API_KEY").expect("$GEMINI_API_KEY is not set");
                 let max_tokens = config.max_tokens.unwrap_or(800);
+                let temperature = config.temperature.unwrap_or(1.0);  // Default value for temperature
+                let top_k = config.top_k.unwrap_or(10);                // Default value for top_k
+                let logits = config.logits.unwrap_or(false);           // Default value for logits
                 match self.model{
                     Model::Gemini15Flash | Model::Gemini15Pro => {
-                        let executor = GeminiExecutor::new(self.model.to_string(), api_key, max_tokens);
-                        executor
+                        let executor = GeminiExecutor::new(self.model.to_string(), api_key, max_tokens, temperature, top_k, logits);
+                                                executor
                             .function_call(prompt, tools, raw_mode, oai_parser)
                             .await?
                     }
@@ -711,7 +717,6 @@ impl Executor {
         entries[index].clone()
     }
 }
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -728,4 +733,25 @@ mod tests {
 
         executor.pull_model().await.expect("should pull model");
     }
-}
+
+    #[tokio::test]
+    async fn test_generate_text_with_config() {
+        let config = Config {
+            max_steps: 10,
+            max_time: 60,
+            tools: vec![],
+            custom_tools: None,
+            max_tokens: Some(800),
+            temperature: Some(0.7),
+            top_k: Some(50),
+            logits: Some(true),
+        };
+
+        let executor = Executor::new(Model::Gemini15Flash);
+        let input = vec![MessageInput::new_user_message("Hello, world!")];
+        let schema = None;
+
+        let result = executor.generate_text(input, &schema, &config).await;
+        assert!(result.is_ok());
+    }
+}
\ No newline at end of file