diff --git a/litellm/model_prices_and_context_window_backup.json b/litellm/model_prices_and_context_window_backup.json
index 79285aa0b9e..41f73ddca5e 100644
--- a/litellm/model_prices_and_context_window_backup.json
+++ b/litellm/model_prices_and_context_window_backup.json
@@ -1448,6 +1448,35 @@
         "supports_native_structured_output": true,
         "supports_minimal_reasoning_effort": true
     },
+    "jp.anthropic.claude-sonnet-4-6": {
+        "cache_creation_input_token_cost": 4.125e-06,
+        "cache_read_input_token_cost": 3.3e-07,
+        "input_cost_per_token": 3.3e-06,
+        "litellm_provider": "bedrock_converse",
+        "max_input_tokens": 1000000,
+        "max_output_tokens": 64000,
+        "max_tokens": 64000,
+        "mode": "chat",
+        "output_cost_per_token": 1.65e-05,
+        "search_context_cost_per_query": {
+            "search_context_size_high": 0.01,
+            "search_context_size_low": 0.01,
+            "search_context_size_medium": 0.01
+        },
+        "supports_assistant_prefill": true,
+        "supports_computer_use": true,
+        "supports_function_calling": true,
+        "supports_pdf_input": true,
+        "supports_prompt_caching": true,
+        "supports_reasoning": true,
+        "supports_response_schema": true,
+        "supports_max_reasoning_effort": true,
+        "supports_tool_choice": true,
+        "supports_vision": true,
+        "tool_use_system_prompt_tokens": 346,
+        "supports_native_structured_output": true,
+        "supports_minimal_reasoning_effort": true
+    },
     "anthropic.claude-sonnet-4-20250514-v1:0": {
         "cache_creation_input_token_cost": 3.75e-06,
         "cache_read_input_token_cost": 3e-07,
@@ -9602,6 +9631,7 @@
             "search_context_size_low": 0.01,
             "search_context_size_medium": 0.01
         },
+        "supports_adaptive_thinking": true,
         "supports_assistant_prefill": true,
         "supports_computer_use": true,
         "supports_function_calling": true,
@@ -9795,6 +9825,7 @@
             "search_context_size_low": 0.01,
             "search_context_size_medium": 0.01
         },
+        "supports_adaptive_thinking": true,
         "supports_assistant_prefill": false,
         "supports_computer_use": true,
         "supports_function_calling": true,
@@ -9828,6 +9859,7 @@
             "search_context_size_low": 0.01,
             "search_context_size_medium": 0.01
         },
+        "supports_adaptive_thinking": true,
         "supports_assistant_prefill": false,
         "supports_computer_use": true,
         "supports_function_calling": true,
@@ -9861,6 +9893,7 @@
             "search_context_size_low": 0.01,
             "search_context_size_medium": 0.01
         },
+        "supports_adaptive_thinking": true,
         "supports_assistant_prefill": false,
         "supports_computer_use": true,
         "supports_function_calling": true,
@@ -9895,6 +9928,7 @@
             "search_context_size_low": 0.01,
             "search_context_size_medium": 0.01
         },
+        "supports_adaptive_thinking": true,
         "supports_assistant_prefill": false,
         "supports_computer_use": true,
         "supports_function_calling": true,
@@ -14883,7 +14917,65 @@
         "mode": "chat",
         "output_cost_per_reasoning_token": 1.5e-06,
         "output_cost_per_token": 1.5e-06,
-        "source": "https://ai.google.dev/gemini-api/docs/models",
+        "source": "https://cloud.google.com/vertex-ai/generative-ai/pricing#gemini-models",
+        "supported_endpoints": [
+            "/v1/chat/completions",
+            "/v1/completions",
+            "/v1/batch"
+        ],
+        "supported_modalities": [
+            "text",
+            "image",
+            "audio",
+            "video"
+        ],
+        "supported_output_modalities": [
+            "text"
+        ],
+        "supports_audio_input": true,
+        "supports_audio_output": false,
+        "supports_code_execution": true,
+        "supports_file_search": true,
+        "supports_function_calling": true,
+        "supports_parallel_function_calling": true,
+        "supports_pdf_input": true,
+        "supports_prompt_caching": true,
+        "supports_reasoning": true,
+        "supports_response_schema": true,
+        "supports_system_messages": true,
+        "supports_tool_choice": true,
+        "supports_url_context": true,
+        "supports_video_input": true,
+        "supports_vision": true,
+        "supports_web_search": true,
+        "supports_native_streaming": true,
+        "search_context_cost_per_query": {
+            "search_context_size_low": 0.014,
+            "search_context_size_medium": 0.014,
+            "search_context_size_high": 0.014
+        },
+        "web_search_billing_unit": "per_query",
+        "supports_service_tier": true
+    },
+    "gemini-3.1-flash-lite": {
+        "cache_read_input_token_cost": 4.5e-08,
+        "cache_read_input_token_cost_per_audio_token": 9e-08,
+        "input_cost_per_audio_token": 9e-07,
+        "input_cost_per_token": 4.5e-07,
+        "litellm_provider": "vertex_ai-language-models",
+        "max_audio_length_hours": 8.4,
+        "max_audio_per_prompt": 1,
+        "max_images_per_prompt": 3000,
+        "max_input_tokens": 1048576,
+        "max_output_tokens": 65536,
+        "max_pdf_size_mb": 30,
+        "max_tokens": 65536,
+        "max_video_length": 1,
+        "max_videos_per_prompt": 10,
+        "mode": "chat",
+        "output_cost_per_reasoning_token": 2.7e-06,
+        "output_cost_per_token": 2.7e-06,
+        "source": "https://cloud.google.com/vertex-ai/generative-ai/pricing#gemini-models",
         "supported_endpoints": [
             "/v1/chat/completions",
             "/v1/completions",
@@ -16987,6 +17079,66 @@
         "web_search_billing_unit": "per_query",
         "supports_service_tier": true
     },
+    "gemini/gemini-3.1-flash-lite": {
+        "cache_read_input_token_cost": 4.5e-08,
+        "cache_read_input_token_cost_per_audio_token": 9e-08,
+        "input_cost_per_audio_token": 9e-07,
+        "input_cost_per_token": 4.5e-07,
+        "litellm_provider": "gemini",
+        "max_audio_length_hours": 8.4,
+        "max_audio_per_prompt": 1,
+        "max_images_per_prompt": 3000,
+        "max_input_tokens": 1048576,
+        "max_output_tokens": 65536,
+        "max_pdf_size_mb": 30,
+        "max_tokens": 65536,
+        "max_video_length": 1,
+        "max_videos_per_prompt": 10,
+        "mode": "chat",
+        "output_cost_per_reasoning_token": 2.7e-06,
+        "output_cost_per_token": 2.7e-06,
+        "rpm": 15,
+        "source": "https://ai.google.dev/gemini-api/docs/pricing",
+        "supported_endpoints": [
+            "/v1/chat/completions",
+            "/v1/completions",
+            "/v1/batch"
+        ],
+        "supported_modalities": [
+            "text",
+            "image",
+            "audio",
+            "video"
+        ],
+        "supported_output_modalities": [
+            "text"
+        ],
+        "supports_audio_input": true,
+        "supports_audio_output": false,
+        "supports_code_execution": true,
+        "supports_file_search": true,
+        "supports_function_calling": true,
+        "supports_parallel_function_calling": true,
+        "supports_pdf_input": true,
+        "supports_prompt_caching": true,
+        "supports_reasoning": true,
+        "supports_response_schema": true,
+        "supports_system_messages": true,
+        "supports_tool_choice": true,
+        "supports_url_context": true,
+        "supports_video_input": true,
+        "supports_vision": true,
+        "supports_web_search": true,
+        "supports_native_streaming": true,
+        "tpm": 250000,
+        "search_context_cost_per_query": {
+            "search_context_size_low": 0.014,
+            "search_context_size_medium": 0.014,
+            "search_context_size_high": 0.014
+        },
+        "web_search_billing_unit": "per_query",
+        "supports_service_tier": true
+    },
     "gemini/gemini-3-flash-preview": {
         "cache_read_input_token_cost": 5e-08,
         "input_cost_per_audio_token": 1e-06,
@@ -33672,6 +33824,64 @@
         },
         "web_search_billing_unit": "per_query"
     },
+    "vertex_ai/gemini-3.1-flash-lite": {
+        "cache_read_input_token_cost": 4.5e-08,
+        "cache_read_input_token_cost_per_audio_token": 9e-08,
+        "input_cost_per_audio_token": 9e-07,
+        "input_cost_per_token": 4.5e-07,
+        "litellm_provider": "vertex_ai-language-models",
+        "max_audio_length_hours": 8.4,
+        "max_audio_per_prompt": 1,
+        "max_images_per_prompt": 3000,
+        "max_input_tokens": 1048576,
+        "max_output_tokens": 65536,
+        "max_pdf_size_mb": 30,
+        "max_tokens": 65536,
+        "max_video_length": 1,
+        "max_videos_per_prompt": 10,
+        "mode": "chat",
+        "output_cost_per_reasoning_token": 2.7e-06,
+        "output_cost_per_token": 2.7e-06,
+        "source": "https://cloud.google.com/vertex-ai/generative-ai/pricing#gemini-models",
+        "supported_endpoints": [
+            "/v1/chat/completions",
+            "/v1/completions",
+            "/v1/batch"
+        ],
+        "supported_modalities": [
+            "text",
+            "image",
+            "audio",
+            "video"
+        ],
+        "supported_output_modalities": [
+            "text"
+        ],
+        "supports_audio_input": true,
+        "supports_audio_output": false,
+        "supports_code_execution": true,
+        "supports_file_search": true,
+        "supports_function_calling": true,
+        "supports_parallel_function_calling": true,
+        "supports_pdf_input": true,
+        "supports_prompt_caching": true,
+        "supports_reasoning": true,
+        "supports_response_schema": true,
+        "supports_system_messages": true,
+        "supports_tool_choice": true,
+        "supports_url_context": true,
+        "supports_video_input": true,
+        "supports_vision": true,
+        "supports_web_search": true,
+        "supports_native_streaming": true,
+        "search_context_cost_per_query": {
+            "search_context_size_low": 0.014,
+            "search_context_size_medium": 0.014,
+            "search_context_size_high": 0.014
+        },
+        "web_search_billing_unit": "per_query",
+        "supports_service_tier": true
+    },
     "vertex_ai/deep-research-pro-preview-12-2025": {
         "input_cost_per_image": 0.0011,
         "input_cost_per_token": 2e-06,
diff --git a/model_prices_and_context_window.json b/model_prices_and_context_window.json
index 5db89e37739..bda94e4768f 100644
--- a/model_prices_and_context_window.json
+++ b/model_prices_and_context_window.json
@@ -14958,16 +14958,10 @@
         "supports_service_tier": true
     },
     "gemini-3.1-flash-lite": {
-        "cache_read_input_token_cost": 2.5e-08,
-        "cache_read_input_token_cost_batches": 1.25e-08,
-        "cache_read_input_token_cost_flex": 1.25e-08,
-        "cache_read_input_token_cost_per_audio_token": 5e-08,
-        "cache_read_input_token_cost_priority": 4.5e-08,
-        "input_cost_per_audio_token": 5e-07,
-        "input_cost_per_token": 2.5e-07,
-        "input_cost_per_token_batches": 1.25e-07,
-        "input_cost_per_token_flex": 1.25e-07,
-        "input_cost_per_token_priority": 4.5e-07,
+        "cache_read_input_token_cost": 4.5e-08,
+        "cache_read_input_token_cost_per_audio_token": 9e-08,
+        "input_cost_per_audio_token": 9e-07,
+        "input_cost_per_token": 4.5e-07,
         "litellm_provider": "vertex_ai-language-models",
         "max_audio_length_hours": 8.4,
         "max_audio_per_prompt": 1,
@@ -14979,12 +14973,9 @@
         "max_video_length": 1,
         "max_videos_per_prompt": 10,
         "mode": "chat",
-        "output_cost_per_reasoning_token": 1.5e-06,
-        "output_cost_per_token": 1.5e-06,
-        "output_cost_per_token_batches": 7.5e-07,
-        "output_cost_per_token_flex": 7.5e-07,
-        "output_cost_per_token_priority": 2.7e-06,
-        "source": "https://ai.google.dev/gemini-api/docs/pricing#gemini-3.1-flash-lite",
+        "output_cost_per_reasoning_token": 2.7e-06,
+        "output_cost_per_token": 2.7e-06,
+        "source": "https://cloud.google.com/vertex-ai/generative-ai/pricing#gemini-models",
         "supported_endpoints": [
             "/v1/chat/completions",
             "/v1/completions",
@@ -17089,16 +17080,10 @@
         "supports_service_tier": true
     },
     "gemini/gemini-3.1-flash-lite": {
-        "cache_read_input_token_cost": 2.5e-08,
-        "cache_read_input_token_cost_batches": 1.25e-08,
-        "cache_read_input_token_cost_flex": 1.25e-08,
-        "cache_read_input_token_cost_per_audio_token": 5e-08,
-        "cache_read_input_token_cost_priority": 4.5e-08,
-        "input_cost_per_audio_token": 5e-07,
-        "input_cost_per_token": 2.5e-07,
-        "input_cost_per_token_batches": 1.25e-07,
-        "input_cost_per_token_flex": 1.25e-07,
-        "input_cost_per_token_priority": 4.5e-07,
+        "cache_read_input_token_cost": 4.5e-08,
+        "cache_read_input_token_cost_per_audio_token": 9e-08,
+        "input_cost_per_audio_token": 9e-07,
+        "input_cost_per_token": 4.5e-07,
         "litellm_provider": "gemini",
         "max_audio_length_hours": 8.4,
         "max_audio_per_prompt": 1,
@@ -17110,13 +17095,10 @@
         "max_video_length": 1,
         "max_videos_per_prompt": 10,
         "mode": "chat",
-        "output_cost_per_reasoning_token": 1.5e-06,
-        "output_cost_per_token": 1.5e-06,
-        "output_cost_per_token_batches": 7.5e-07,
-        "output_cost_per_token_flex": 7.5e-07,
-        "output_cost_per_token_priority": 2.7e-06,
+        "output_cost_per_reasoning_token": 2.7e-06,
+        "output_cost_per_token": 2.7e-06,
         "rpm": 15,
-        "source": "https://ai.google.dev/gemini-api/docs/pricing#gemini-3.1-flash-lite",
+        "source": "https://ai.google.dev/gemini-api/docs/pricing",
         "supported_endpoints": [
             "/v1/chat/completions",
             "/v1/completions",
@@ -33879,16 +33861,10 @@
         "web_search_billing_unit": "per_query"
     },
     "vertex_ai/gemini-3.1-flash-lite": {
-        "cache_read_input_token_cost": 2.5e-08,
-        "cache_read_input_token_cost_batches": 1.25e-08,
-        "cache_read_input_token_cost_flex": 1.25e-08,
-        "cache_read_input_token_cost_per_audio_token": 5e-08,
-        "cache_read_input_token_cost_priority": 4.5e-08,
-        "input_cost_per_audio_token": 5e-07,
-        "input_cost_per_token": 2.5e-07,
-        "input_cost_per_token_batches": 1.25e-07,
-        "input_cost_per_token_flex": 1.25e-07,
-        "input_cost_per_token_priority": 4.5e-07,
+        "cache_read_input_token_cost": 4.5e-08,
+        "cache_read_input_token_cost_per_audio_token": 9e-08,
+        "input_cost_per_audio_token": 9e-07,
+        "input_cost_per_token": 4.5e-07,
         "litellm_provider": "vertex_ai-language-models",
         "max_audio_length_hours": 8.4,
         "max_audio_per_prompt": 1,
@@ -33900,11 +33876,8 @@
         "max_video_length": 1,
         "max_videos_per_prompt": 10,
         "mode": "chat",
-        "output_cost_per_reasoning_token": 1.5e-06,
-        "output_cost_per_token": 1.5e-06,
-        "output_cost_per_token_batches": 7.5e-07,
-        "output_cost_per_token_flex": 7.5e-07,
-        "output_cost_per_token_priority": 2.7e-06,
+        "output_cost_per_reasoning_token": 2.7e-06,
+        "output_cost_per_token": 2.7e-06,
         "source": "https://cloud.google.com/vertex-ai/generative-ai/pricing#gemini-models",
         "supported_endpoints": [
             "/v1/chat/completions",
diff --git a/tests/test_litellm/test_cost_calculator.py b/tests/test_litellm/test_cost_calculator.py
index c22cb8fefc6..00902890da3 100644
--- a/tests/test_litellm/test_cost_calculator.py
+++ b/tests/test_litellm/test_cost_calculator.py
@@ -2059,6 +2059,25 @@ def test_openrouter_gemini_3_1_flash_lite_preview_pricing():
     assert model_info["max_output_tokens"] == 65536
 
 
+def test_gemini_3_1_flash_lite_pricing():
+    os.environ["LITELLM_LOCAL_MODEL_COST_MAP"] = "True"
+    litellm.model_cost = litellm.get_model_cost_map(url="")
+
+    for model_name in (
+        "gemini-3.1-flash-lite",
+        "gemini/gemini-3.1-flash-lite",
+        "vertex_ai/gemini-3.1-flash-lite",
+    ):
+        model_info = litellm.model_cost.get(model_name)
+        assert model_info is not None, f"Missing model pricing entry: {model_name}"
+        assert model_info["input_cost_per_token"] == 4.5e-07
+        assert model_info["input_cost_per_audio_token"] == 9e-07
+        assert model_info["output_cost_per_token"] == 2.7e-06
+        assert model_info["output_cost_per_reasoning_token"] == 2.7e-06
+        assert model_info["cache_read_input_token_cost"] == 4.5e-08
+        assert model_info["max_input_tokens"] == 1048576
+
+
 def test_custom_pricing_applies_cache_read_input_cost():
     """
     Bug 1 reproduction: custom_cost_per_token with cache_read_input_token_cost