diff --git a/README.md b/README.md
index f896c13..cb64d4a 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,6 @@ Download it from [GitHub Releases](https://github.com/sigoden/aichat/releases),
 - [x] LocalAI: user deployed opensource LLMs 
 - [x] Azure-OpenAI: user created gpt3.5/gpt4
 - [x] Gemini: gemini-pro/gemini-pro-vision/gemini-ultra 
-- [x] PaLM: chat-bison-001 
 - [x] Ernie: ernie-bot-turbo/ernie-bot/ernie-bot-8k/ernie-bot-4
 - [x] Qianwen: qwen-turbo/qwen-plus/qwen-max
 
diff --git a/config.example.yaml b/config.example.yaml
index 847beca..502969b 100644
--- a/config.example.yaml
+++ b/config.example.yaml
@@ -43,10 +43,6 @@ clients:
   - type: gemini
     api_key: AIxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 
-  # See https://developers.generativeai.google/guide
-  - type: palm
-    api_key: AIxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-
   # See https://cloud.baidu.com/doc/WENXINWORKSHOP/index.html
   - type: ernie
     api_key: xxxxxxxxxxxxxxxxxxxxxxxx
diff --git a/src/client/common.rs b/src/client/common.rs
index 98cffa2..9ff02ba 100644
--- a/src/client/common.rs
+++ b/src/client/common.rs
@@ -292,6 +292,7 @@ pub fn create_config(list: &[PromptType], client: &str) -> Result<Value> {
     Ok(clients)
 }
 
+#[allow(unused)]
 pub async fn send_message_as_streaming<F, Fut>(
     builder: RequestBuilder,
     handler: &mut ReplyHandler,
diff --git a/src/client/mod.rs b/src/client/mod.rs
index dc6b093..d2ada44 100644
--- a/src/client/mod.rs
+++ b/src/client/mod.rs
@@ -17,7 +17,6 @@ register_client!(
         AzureOpenAIClient
     ),
     (gemini, "gemini", GeminiConfig, GeminiClient),
-    (palm, "palm", PaLMConfig, PaLMClient),
     (ernie, "ernie", ErnieConfig, ErnieClient),
     (qianwen, "qianwen", QianwenConfig, QianwenClient),
 );
diff --git a/src/client/palm.rs b/src/client/palm.rs
deleted file mode 100644
index a519768..0000000
--- a/src/client/palm.rs
+++ /dev/null
@@ -1,131 +0,0 @@
-use super::{PaLMClient, Client, ExtraConfig, Model, PromptType, SendData, TokensCountFactors, send_message_as_streaming, patch_system_message};
-
-use crate::{config::GlobalConfig, render::ReplyHandler, utils::PromptKind};
-
-use anyhow::{anyhow, bail, Result};
-use async_trait::async_trait;
-use reqwest::{Client as ReqwestClient, RequestBuilder};
-use serde::Deserialize;
-use serde_json::{json, Value};
-
-const API_BASE: &str = "https://generativelanguage.googleapis.com/v1beta2/models/";
-
-const MODELS: [(&str, usize); 1] = [("chat-bison-001", 4096)];
-
-const TOKENS_COUNT_FACTORS: TokensCountFactors = (3, 8);
-
-#[derive(Debug, Clone, Deserialize, Default)]
-pub struct PaLMConfig {
-    pub name: Option<String>,
-    pub api_key: Option<String>,
-    pub extra: Option<ExtraConfig>,
-}
-
-#[async_trait]
-impl Client for PaLMClient {
-    fn config(&self) -> (&GlobalConfig, &Option<ExtraConfig>) {
-        (&self.global_config, &self.config.extra)
-    }
-
-    async fn send_message_inner(&self, client: &ReqwestClient, data: SendData) -> Result<String> {
-        let builder = self.request_builder(client, data)?;
-        send_message(builder).await
-    }
-
-    async fn send_message_streaming_inner(
-        &self,
-        client: &ReqwestClient,
-        handler: &mut ReplyHandler,
-        data: SendData,
-    ) -> Result<()> {
-        let builder = self.request_builder(client, data)?;
-        send_message_as_streaming(builder, handler, send_message).await
-    }
-}
-
-impl PaLMClient {
-    config_get_fn!(api_key, get_api_key);
-
-    pub const PROMPTS: [PromptType<'static>; 1] =
-        [("api_key", "API Key:", true, PromptKind::String)];
-
-    pub fn list_models(local_config: &PaLMConfig) -> Vec<Model> {
-        let client_name = Self::name(local_config);
-        MODELS
-            .into_iter()
-            .map(|(name, max_tokens)| {
-                Model::new(client_name, name)
-                    .set_max_tokens(Some(max_tokens))
-                    .set_tokens_count_factors(TOKENS_COUNT_FACTORS)
-            })
-            .collect()
-    }
-
-    fn request_builder(&self, client: &ReqwestClient, data: SendData) -> Result<RequestBuilder> {
-        let api_key = self.get_api_key()?;
-
-        let body = build_body(data, self.model.name.clone());
-
-        let model = self.model.name.clone();
-
-        let url = format!("{API_BASE}{}:generateMessage?key={}", model, api_key);
-
-        debug!("PaLM Request: {url} {body}");
-
-        let builder = client.post(url).json(&body);
-
-        Ok(builder)
-    }
-}
-
-async fn send_message(builder: RequestBuilder) -> Result<String> {
-    let data: Value = builder.send().await?.json().await?;
-    check_error(&data)?;
-
-    let output = data["candidates"][0]["content"]
-        .as_str()
-        .ok_or_else(|| {
-            if let Some(reason) = data["filters"][0]["reason"].as_str() {
-                anyhow!("Content Filtering: {reason}")
-            } else {
-                anyhow!("Unexpected response")
-            }
-        })?;
-
-    Ok(output.to_string())
-}
-
-fn check_error(data: &Value) -> Result<()> {
-    if let Some(error) = data["error"].as_object() {
-        if let Some(message) = error["message"].as_str() {
-            bail!("{message}");
-        } else {
-            bail!("Error {}", Value::Object(error.clone()));
-        }
-    }
-    Ok(())
-}
-
-fn build_body(data: SendData, _model: String) -> Value {
-    let SendData {
-        mut messages,
-        temperature,
-        ..
-    } = data;
-
-    patch_system_message(&mut messages);
-    
-    let messages: Vec<Value> = messages.into_iter().map(|v| json!({ "content": v.content })).collect();
-
-    let prompt = json!({ "messages": messages });
-
-    let mut body = json!({
-        "prompt": prompt,
-    });
-
-    if let Some(temperature) = temperature {
-        body["temperature"] = (temperature / 2.0).into();
-    }
-
-    body
-}