diff --git a/.changeset/late-apricots-yell.md b/.changeset/late-apricots-yell.md
new file mode 100644
index 0000000000000000000000000000000000000000..96c8694587b54cb29fe59e5b953deb46c0151b84
--- /dev/null
+++ b/.changeset/late-apricots-yell.md
@@ -0,0 +1,5 @@
+---
+"@llamaindex/core": patch
+---
+
+Remove chunk size limit for prompt helper (use LLM default)
diff --git a/packages/core/src/indices/prompt-helper.ts b/packages/core/src/indices/prompt-helper.ts
index 960ffe31f7ed156f8e65e26619421e45aabdd1cb..477c5037cb1b06841fa422adfef0fe9392ba31e8 100644
--- a/packages/core/src/indices/prompt-helper.ts
+++ b/packages/core/src/indices/prompt-helper.ts
@@ -1,7 +1,6 @@
 import { type Tokenizer, tokenizers } from "@llamaindex/env";
 import {
   DEFAULT_CHUNK_OVERLAP_RATIO,
-  DEFAULT_CHUNK_SIZE,
   DEFAULT_CONTEXT_WINDOW,
   DEFAULT_NUM_OUTPUTS,
   DEFAULT_PADDING,
@@ -171,7 +170,7 @@ export class PromptHelper {
   ) {
     const {
       chunkOverlapRatio = DEFAULT_CHUNK_OVERLAP_RATIO,
-      chunkSizeLimit = DEFAULT_CHUNK_SIZE,
+      chunkSizeLimit = undefined,
       tokenizer = Settings.tokenizer,
       separator = " ",
     } = options ?? {};