diff --git a/litellm/litellm_core_utils/prompt_templates/factory.py b/litellm/litellm_core_utils/prompt_templates/factory.py
index 30263543fc6..2c6b957e392 100644
--- a/litellm/litellm_core_utils/prompt_templates/factory.py
+++ b/litellm/litellm_core_utils/prompt_templates/factory.py
@@ -2178,6 +2178,16 @@ def anthropic_messages_pt(  # noqa: PLR0915
         while msg_i < len(messages) and messages[msg_i]["role"] == "assistant":
             assistant_content_block: ChatCompletionAssistantMessage = messages[msg_i]  # type: ignore
 
+            # Extract compaction_blocks from provider_specific_fields and add them first
+            _provider_specific_fields_raw = assistant_content_block.get(
+                "provider_specific_fields"
+            )
+            if isinstance(_provider_specific_fields_raw, dict):
+                _compaction_blocks = _provider_specific_fields_raw.get("compaction_blocks")
+                if _compaction_blocks and isinstance(_compaction_blocks, list):
+                    # Add compaction blocks at the beginning of assistant content : https://platform.claude.com/docs/en/build-with-claude/compaction
+                    assistant_content.extend(_compaction_blocks)  # type: ignore
+
             thinking_blocks = assistant_content_block.get("thinking_blocks", None)
             if (
                 thinking_blocks is not None