diff --git a/src/bot.rs b/src/bot.rs
index 305ac6f..413de1e 100644
--- a/src/bot.rs
+++ b/src/bot.rs
@@ -9,17 +9,18 @@ use crate::{
 };
 
 #[derive(Deserialize, Debug)]
-struct ReviewResult {
-    reviews: Vec<ReviewItem>,
-    comment: String,
+pub struct ReviewResult {
+    pub reviews: Vec<ReviewItem>,
+    pub comment: String,
+    pub cost: Option<f64>,
 }
 
 #[derive(Deserialize, Debug)]
-struct ReviewItem {
-    filename: String,
-    line: Option<u64>,
-    code: String,
-    message: String,
+pub struct ReviewItem {
+    pub filename: String,
+    pub line: Option<u64>,
+    pub code: String,
+    pub message: String,
 }
 
 /// Map a filename to a markdown language identifier for syntax highlighting.
@@ -69,7 +70,7 @@ pub struct Bot {
 impl Bot {
     pub fn new(config: EnvConfig) -> anyhow::Result<Self> {
         Ok(Self {
-            gitea_api: GiteaAPI::new(&config.gitea_url, &config.gitea_token, config.gitea_timeout),
+            gitea_api: GiteaAPI::new(&config.gitea_url, &config.gitea_token, config.gitea_timeout)?,
             open_router_client: OpenRouterClient::new(
                 &config.open_router_api_key,
                 &config.open_router_model,
@@ -112,7 +113,7 @@ impl Bot {
             )
             .await?;
 
-        let bot_result: Result<String, anyhow::Error> = async {
+        let bot_result: Result<ReviewResult, anyhow::Error> = async {
             let git_diff = self
                 .download_git_diff(&review_payload.pull_request.diff_url)
                 .await?;
@@ -122,7 +123,12 @@ impl Bot {
                 .replace("{comment}", &review_payload.comment.body)
                 .replace("{diff}", &git_diff);
 
-            self.open_router_client.chat(&bot_request).await
+            let chat_result = self.open_router_client.chat(&bot_request).await?;
+            let mut review_result = serde_json::from_str::<ReviewResult>(&chat_result.message)?;
+
+            review_result.cost = chat_result.cost;
+
+            Ok(review_result)
         }
         .await;
 
@@ -142,17 +148,7 @@ impl Bot {
         Ok(())
     }
 
-    fn review_result_to_markdown(&self, result: &str) -> String {
-        let review_result: ReviewResult = match serde_json::from_str(result) {
-            Ok(review_result) => review_result,
-            Err(_) => {
-                return format!(
-                    "Failed to parse review result. Raw output:\n\n```json\n{}\n```",
-                    result
-                );
-            }
-        };
-
+    fn review_result_to_markdown(&self, review_result: &ReviewResult) -> String {
         if review_result.reviews.is_empty() {
             return String::from("No issues found. ✅");
         }
@@ -181,6 +177,12 @@ impl Bot {
             md.push('\n');
         }
 
+        if let Some(cost) = review_result.cost {
+            md.push_str("\n---\n\n");
+            md.push_str(&format!("### Cost: ${}", cost));
+            md.push('\n');
+        }
+
         md
     }
 
diff --git a/src/consts.rs b/src/consts.rs
index 4eb1b41..ded647d 100644
--- a/src/consts.rs
+++ b/src/consts.rs
@@ -30,6 +30,7 @@ pub const REVIEW_PROMPT: &str = "
     The line number increments by 1 for each context or added line.
 
     Return your feedback, in french, with only this json format, reviews must contain each review
+    All fields are mandatory.
     (filename field must contain the full path with extension) and comment must contain a final summary:
 
     {
diff --git a/src/gitea.rs b/src/gitea.rs
index c8bff4a..4f81913 100644
--- a/src/gitea.rs
+++ b/src/gitea.rs
@@ -12,15 +12,22 @@ pub struct GiteaAPI {
 }
 
 impl GiteaAPI {
-    pub fn new(base_url: &str, token: &str, timeout: u64) -> Self {
-        Self {
+    pub fn new(base_url: &str, token: &str, timeout: u64) -> anyhow::Result<Self> {
+        let mut default_headers = reqwest::header::HeaderMap::new();
+        default_headers.insert(
+            reqwest::header::HeaderName::from_static("authorization"),
+            reqwest::header::HeaderValue::from_str(&format!("Bearer {}", token))?,
+        );
+
+        Ok(Self {
             base_url: String::from(base_url),
             client: reqwest::Client::builder()
                 .timeout(Duration::from_secs(timeout))
+                .default_headers(default_headers)
                 .build()
                 .unwrap(),
             token: String::from(token),
-        }
+        })
     }
 
     pub async fn comment(
@@ -30,8 +37,8 @@ impl GiteaAPI {
         index: u64,
     ) -> anyhow::Result<Comment> {
         let url = format!(
-            "{}/api/v1/repos/{}/issues/{}/comments?access_token={}",
-            self.base_url, full_name, index, self.token
+            "{}/api/v1/repos/{}/issues/{}/comments",
+            self.base_url, full_name, index
         );
 
         let res = self
@@ -53,8 +60,8 @@ impl GiteaAPI {
         comment_id: u64,
     ) -> anyhow::Result<()> {
         let url = format!(
-            "{}/api/v1/repos/{}/issues/comments/{}?access_token={}",
-            self.base_url, full_name, comment_id, self.token
+            "{}/api/v1/repos/{}/issues/comments/{}",
+            self.base_url, full_name, comment_id
         );
 
         self.client
diff --git a/src/open_router.rs b/src/open_router.rs
index cb8dbfa..b5602d5 100644
--- a/src/open_router.rs
+++ b/src/open_router.rs
@@ -2,6 +2,11 @@ use std::time::Duration;
 
 use openrouter_rs::{Message, api::chat::ChatCompletionRequest};
 
+pub struct ChatResult {
+    pub message: String,
+    pub cost: Option<f64>,
+}
+
 pub struct OpenRouterClient {
     client: openrouter_rs::OpenRouterClient,
     model: String,
@@ -22,21 +27,21 @@ impl OpenRouterClient {
         })
     }
 
-    pub async fn chat(&self, msg: &str) -> anyhow::Result<String> {
+    pub async fn chat(&self, msg: &str) -> anyhow::Result<ChatResult> {
         let request = ChatCompletionRequest::builder()
             .model(&self.model)
             .enable_reasoning()
-            .messages(vec![Message::new(
-                openrouter_rs::types::Role::Developer,
-                msg,
-            )])
+            .messages(vec![Message::new(openrouter_rs::types::Role::User, msg)])
             .build()?;
 
         let response = self.client.chat().create(&request).await?;
 
-        response.choices[0]
-            .content()
-            .map(|msg| String::from(msg))
-            .ok_or(anyhow::anyhow!("No content"))
+        Ok(ChatResult {
+            message: response.choices[0]
+                .content()
+                .map(|msg| String::from(msg))
+                .ok_or(anyhow::anyhow!("No content"))?,
+            cost: response.usage.and_then(|u| u.cost),
+        })
     }
 }