diff --git a/litellm/llms/anthropic/experimental_pass_through/adapters/transformation.py b/litellm/llms/anthropic/experimental_pass_through/adapters/transformation.py
index 8b21569546..a7362a9431 100644
--- a/litellm/llms/anthropic/experimental_pass_through/adapters/transformation.py
+++ b/litellm/llms/anthropic/experimental_pass_through/adapters/transformation.py
@@ -1106,19 +1106,19 @@ class LiteLLMAnthropicMessagesAdapter:
         # extract usage
         usage: Usage = getattr(response, "usage")
         uncached_input_tokens = usage.prompt_tokens or 0
+        cached_tokens = 0
         if hasattr(usage, "prompt_tokens_details") and usage.prompt_tokens_details:
             cached_tokens = getattr(usage.prompt_tokens_details, "cached_tokens", 0) or 0
             uncached_input_tokens -= cached_tokens
-        
+
         anthropic_usage = AnthropicUsage(
             input_tokens=uncached_input_tokens,
             output_tokens=usage.completion_tokens or 0,
         )
-        # Add cache tokens if available (for prompt caching support)
         if hasattr(usage, "_cache_creation_input_tokens") and usage._cache_creation_input_tokens > 0:
             anthropic_usage["cache_creation_input_tokens"] = usage._cache_creation_input_tokens
-        if hasattr(usage, "_cache_read_input_tokens") and usage._cache_read_input_tokens > 0:
-            anthropic_usage["cache_read_input_tokens"] = usage._cache_read_input_tokens
+        if cached_tokens > 0:
+            anthropic_usage["cache_read_input_tokens"] = cached_tokens
 
         translated_obj = AnthropicMessagesResponse(
             id=response.id,
@@ -1271,19 +1271,19 @@ class LiteLLMAnthropicMessagesAdapter:
                 litellm_usage_chunk = None
             if litellm_usage_chunk is not None:
                 uncached_input_tokens = litellm_usage_chunk.prompt_tokens or 0
+                cached_tokens = 0
                 if hasattr(litellm_usage_chunk, "prompt_tokens_details") and litellm_usage_chunk.prompt_tokens_details:
                     cached_tokens = getattr(litellm_usage_chunk.prompt_tokens_details, "cached_tokens", 0) or 0
                     uncached_input_tokens -= cached_tokens
-                
+
                 usage_delta = UsageDelta(
                     input_tokens=uncached_input_tokens,
                     output_tokens=litellm_usage_chunk.completion_tokens or 0,
                 )
-                # Add cache tokens if available (for prompt caching support)
                 if hasattr(litellm_usage_chunk, "_cache_creation_input_tokens") and litellm_usage_chunk._cache_creation_input_tokens > 0:
                     usage_delta["cache_creation_input_tokens"] = litellm_usage_chunk._cache_creation_input_tokens
-                if hasattr(litellm_usage_chunk, "_cache_read_input_tokens") and litellm_usage_chunk._cache_read_input_tokens > 0:
-                    usage_delta["cache_read_input_tokens"] = litellm_usage_chunk._cache_read_input_tokens
+                if cached_tokens > 0:
+                    usage_delta["cache_read_input_tokens"] = cached_tokens
             else:
                 usage_delta = UsageDelta(input_tokens=0, output_tokens=0)
             return MessageBlockDelta(
diff --git a/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py b/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py
index 1ea1374cfb..839d032c43 100644
--- a/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py
+++ b/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py
@@ -1813,6 +1813,51 @@ def test_translate_openai_response_to_anthropic_input_tokens_no_cache():
     assert anthropic_response["usage"]["output_tokens"] == 50
 
 
+def test_translate_openai_response_to_anthropic_cache_tokens_from_prompt_tokens_details():
+    """
+    OpenAI/Azure providers set prompt_tokens_details.cached_tokens but not
+    _cache_read_input_tokens.  The adapter should populate cache_read_input_tokens
+    from prompt_tokens_details.cached_tokens directly.
+    """
+    from litellm.types.utils import PromptTokensDetailsWrapper
+
+    # OpenAI-style usage: only prompt_tokens_details, no cache_read_input_tokens kwarg
+    usage = Usage(
+        prompt_tokens=100,
+        completion_tokens=50,
+        total_tokens=150,
+        prompt_tokens_details=PromptTokensDetailsWrapper(
+            cached_tokens=30
+        ),
+    )
+
+    response = ModelResponse(
+        id="test-id",
+        choices=[
+            Choices(
+                index=0,
+                finish_reason="stop",
+                message=Message(
+                    role="assistant",
+                    content="Test response",
+                ),
+            )
+        ],
+        model="gpt-4o-2024-08-06",
+        usage=usage,
+    )
+
+    adapter = LiteLLMAnthropicMessagesAdapter()
+    anthropic_response = adapter.translate_openai_response_to_anthropic(
+        response=response,
+        tool_name_mapping=None,
+    )
+
+    assert anthropic_response["usage"]["input_tokens"] == 70
+    assert anthropic_response["usage"]["output_tokens"] == 50
+    assert anthropic_response["usage"]["cache_read_input_tokens"] == 30
+
+
 # =====================================================================
 # Web Search Tool Transformation Tests
 # =====================================================================