diff --git a/spring-ai-core/src/main/java/org/springframework/ai/chat/prompt/PromptTemplate.java b/spring-ai-core/src/main/java/org/springframework/ai/chat/prompt/PromptTemplate.java
index 852089e2b23..07bfefbe41b 100644
--- a/spring-ai-core/src/main/java/org/springframework/ai/chat/prompt/PromptTemplate.java
+++ b/spring-ai-core/src/main/java/org/springframework/ai/chat/prompt/PromptTemplate.java
@@ -29,6 +29,7 @@
 import org.antlr.runtime.Token;
 import org.antlr.runtime.TokenStream;
 import org.stringtemplate.v4.ST;
+import org.stringtemplate.v4.compiler.Compiler;
 import org.stringtemplate.v4.compiler.STLexer;
 
 import org.springframework.ai.chat.messages.Message;
@@ -47,6 +48,8 @@ public class PromptTemplate implements PromptTemplateActions, PromptTemplateMess
 
 	private Map<String, Object> dynamicModel = new HashMap<>();
 
+	private boolean skipRenderValidate = true;
+
 	public PromptTemplate(Resource resource) {
 		try (InputStream inputStream = resource.getInputStream()) {
 			this.template = StreamUtils.copyToString(inputStream, Charset.defaultCharset());
@@ -106,6 +109,26 @@ public PromptTemplate(Resource resource, Map<String, Object> model) {
 		}
 	}
 
+	public PromptTemplate(Resource resource, boolean skipRenderValidate) {
+		this(resource);
+		this.skipRenderValidate = skipRenderValidate;
+	}
+
+	public PromptTemplate(String template, boolean skipRenderValidate) {
+		this(template);
+		this.skipRenderValidate = skipRenderValidate;
+	}
+
+	public PromptTemplate(String template, Map<String, Object> model, boolean skipRenderValidate) {
+		this(template, model);
+		this.skipRenderValidate = skipRenderValidate;
+	}
+
+	public PromptTemplate(Resource resource, Map<String, Object> model, boolean skipRenderValidate) {
+		this(resource, model);
+		this.skipRenderValidate = skipRenderValidate;
+	}
+
 	public void add(String name, Object value) {
 		this.st.add(name, value);
 		this.dynamicModel.put(name, value);
@@ -199,15 +222,21 @@ public Set<String> getInputVariables() {
 			if (token.getType() == STLexer.LDELIM && i + 1 < tokens.size()
 					&& tokens.get(i + 1).getType() == STLexer.ID) {
 				if (i + 2 < tokens.size() && tokens.get(i + 2).getType() == STLexer.COLON) {
-					inputVariables.add(tokens.get(i + 1).getText());
-					isInsideList = true;
+					String text = tokens.get(i + 1).getText();
+					if (!Compiler.funcs.containsKey(text)) {
+						inputVariables.add(text);
+						isInsideList = true;
+					}
 				}
 			}
 			else if (token.getType() == STLexer.RDELIM) {
 				isInsideList = false;
 			}
 			else if (!isInsideList && token.getType() == STLexer.ID) {
-				inputVariables.add(token.getText());
+				if (!Compiler.funcs.containsKey(token.getText())) {
+					inputVariables.add(token.getText());
+				}
+
 			}
 		}
 
@@ -222,6 +251,9 @@ private Set<String> getModelKeys(Map<String, Object> model) {
 	}
 
 	protected void validate(Map<String, Object> model) {
+		if (skipRenderValidate) {
+			return;
+		}
 
 		Set<String> templateTokens = getInputVariables();
 		Set<String> modelKeys = getModelKeys(model);
diff --git a/spring-ai-core/src/test/java/org/springframework/ai/chat/prompt/PromptTemplateTests.java b/spring-ai-core/src/test/java/org/springframework/ai/chat/prompt/PromptTemplateTests.java
new file mode 100644
index 00000000000..7eb5edec465
--- /dev/null
+++ b/spring-ai-core/src/test/java/org/springframework/ai/chat/prompt/PromptTemplateTests.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2023-2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.ai.chat.prompt;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * Unit Tests for {@link PromptTemplateTests}.
+ *
+ * @author Sun Yuhan
+ */
+public class PromptTemplateTests {
+	@Test
+	void buildPromptTemplateWithBuiltInFunctions() {
+		String chatMemoryPrompt = """
+                {if(strlen(memory))}
+
+                Hello World!
+
+                ---------------------
+                {memory}
+                ---------------------
+                {endif}
+                """;
+
+		PromptTemplate promptTemplate = new PromptTemplate(chatMemoryPrompt);
+		promptTemplate.add("memory", "you are a helpful assistant");
+		System.out.println(promptTemplate.render());
+	}
+
+	@Test
+	void buildPromptTemplateSkipRenderValidate() {
+		String chatMemoryPrompt = """
+                {if(strlen(memory))}
+
+                Hello World!
+
+                ---------------------
+                {memory}
+                ---------------------
+                {endif}
+                """;
+
+		PromptTemplate promptTemplate = new PromptTemplate(chatMemoryPrompt, true);
+		promptTemplate.add("memory", "you are a helpful assistant");
+		System.out.println(promptTemplate.render());
+	}
+}