diff --git a/desktop/Backend-Rust/src/models/chat_completions.rs b/desktop/Backend-Rust/src/models/chat_completions.rs
index 5132cd1244..c704f11746 100644
--- a/desktop/Backend-Rust/src/models/chat_completions.rs
+++ b/desktop/Backend-Rust/src/models/chat_completions.rs
@@ -231,23 +231,16 @@ pub struct AnthropicUsage {
 #[serde(tag = "type")]
 pub enum AnthropicStreamEvent {
     #[serde(rename = "message_start")]
-    MessageStart {
-        message: AnthropicStreamMessage,
-    },
+    MessageStart { message: AnthropicStreamMessage },
     #[serde(rename = "content_block_start")]
     ContentBlockStart {
         index: usize,
         content_block: AnthropicContentBlock,
     },
     #[serde(rename = "content_block_delta")]
-    ContentBlockDelta {
-        index: usize,
-        delta: AnthropicDelta,
-    },
+    ContentBlockDelta { index: usize, delta: AnthropicDelta },
     #[serde(rename = "content_block_stop")]
-    ContentBlockStop {
-        index: usize,
-    },
+    ContentBlockStop { index: usize },
     #[serde(rename = "message_delta")]
     MessageDelta {
         delta: AnthropicMessageDelta,
@@ -258,9 +251,7 @@ pub enum AnthropicStreamEvent {
     #[serde(rename = "ping")]
     Ping {},
     #[serde(rename = "error")]
-    Error {
-        error: AnthropicStreamError,
-    },
+    Error { error: AnthropicStreamError },
 }
 
 #[derive(Debug, Clone, Deserialize)]
@@ -339,6 +330,16 @@ pub const MODEL_ROUTES: &[ModelRoute] = &[
         upstream_model: "claude-sonnet-4-6",
         provider: Provider::Anthropic,
     },
+    ModelRoute {
+        public_model: "omi-haiku",
+        upstream_model: "claude-haiku-4-5-20251001",
+        provider: Provider::Anthropic,
+    },
+    ModelRoute {
+        public_model: "claude-haiku-4-5-20251001",
+        upstream_model: "claude-haiku-4-5-20251001",
+        provider: Provider::Anthropic,
+    },
 ];
 
 pub fn resolve_model(model: &str) -> Option<&'static ModelRoute> {
@@ -358,9 +359,8 @@ pub fn map_stop_reason(anthropic_reason: Option<&str>) -> Option<String> {
 }
 
 pub fn anthropic_usage_to_openai(usage: &AnthropicUsage) -> Usage {
-    let prompt_tokens = usage.input_tokens
-        + usage.cache_creation_input_tokens
-        + usage.cache_read_input_tokens;
+    let prompt_tokens =
+        usage.input_tokens + usage.cache_creation_input_tokens + usage.cache_read_input_tokens;
     let completion_tokens = usage.output_tokens;
     Usage {
         prompt_tokens,
diff --git a/desktop/Backend-Rust/src/routes/chat_completions.rs b/desktop/Backend-Rust/src/routes/chat_completions.rs
index 640f16156f..ea8cb518c9 100644
--- a/desktop/Backend-Rust/src/routes/chat_completions.rs
+++ b/desktop/Backend-Rust/src/routes/chat_completions.rs
@@ -70,6 +70,12 @@ fn model_cost(upstream_model: &str) -> ModelCost {
             cache_read_per_token: 1.50 / 1_000_000.0,
             cache_write_per_token: 18.75 / 1_000_000.0,
         },
+        "claude-haiku-4-5-20251001" => ModelCost {
+            input_per_token: 0.80 / 1_000_000.0,
+            output_per_token: 4.00 / 1_000_000.0,
+            cache_read_per_token: 0.08 / 1_000_000.0,
+            cache_write_per_token: 1.00 / 1_000_000.0,
+        },
         _ => ModelCost {
             input_per_token: 3.0 / 1_000_000.0,
             output_per_token: 15.0 / 1_000_000.0,
@@ -926,6 +932,14 @@ mod tests {
         assert_eq!(route.upstream_model, "claude-opus-4-6");
     }
 
+    #[test]
+    fn test_resolve_model_haiku() {
+        let route = resolve_model("omi-haiku").unwrap();
+        assert_eq!(route.public_model, "omi-haiku");
+        assert_eq!(route.upstream_model, "claude-haiku-4-5-20251001");
+        assert_eq!(route.provider, Provider::Anthropic);
+    }
+
     #[test]
     fn test_resolve_model_claude_aliases() {
         let route = resolve_model("claude-opus-4-6").unwrap();
@@ -948,7 +962,6 @@ mod tests {
     fn test_resolve_model_unknown() {
         assert!(resolve_model("gpt-4").is_none());
         assert!(resolve_model("").is_none());
-        assert!(resolve_model("omi-haiku").is_none());
     }
 
     #[test]