diff --git a/litellm/model_prices_and_context_window_backup.json b/litellm/model_prices_and_context_window_backup.json
index 5fb4aad96d2..f6589351cd4 100644
--- a/litellm/model_prices_and_context_window_backup.json
+++ b/litellm/model_prices_and_context_window_backup.json
@@ -27738,7 +27738,7 @@
         "output_cost_per_token_above_200k_tokens": 1.8e-05,
         "output_cost_per_token_batches": 6e-06,
         "rpm": 2000,
-        "source": "https://ai.google.dev/gemini-api/docs/models#gemini-3.1-pro-preview",
+        "source": "https://ai.google.dev/gemini-api/docs/pricing",
         "supported_endpoints": [
             "/v1/chat/completions",
             "/v1/completions",
@@ -27773,13 +27773,16 @@
         "output_cost_per_token_above_200k_tokens_priority": 3.24e-05,
         "cache_read_input_token_cost_priority": 3.6e-07,
         "cache_read_input_token_cost_above_200k_tokens_priority": 7.2e-07,
+        "cache_read_input_token_cost_flex": 2e-07,
         "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",
-        "google_maps_grounding_cost_per_query": 0.014
+        "google_maps_grounding_cost_per_query": 0.014,
+        "input_cost_per_token_flex": 1e-06,
+        "output_cost_per_token_flex": 6e-06
     },
     "gemini-3-flash-preview": {
         "cache_read_input_audio_token_cost": 1e-07,
diff --git a/model_prices_and_context_window.json b/model_prices_and_context_window.json
index 5fb4aad96d2..f6589351cd4 100644
--- a/model_prices_and_context_window.json
+++ b/model_prices_and_context_window.json
@@ -27738,7 +27738,7 @@
         "output_cost_per_token_above_200k_tokens": 1.8e-05,
         "output_cost_per_token_batches": 6e-06,
         "rpm": 2000,
-        "source": "https://ai.google.dev/gemini-api/docs/models#gemini-3.1-pro-preview",
+        "source": "https://ai.google.dev/gemini-api/docs/pricing",
         "supported_endpoints": [
             "/v1/chat/completions",
             "/v1/completions",
@@ -27773,13 +27773,16 @@
         "output_cost_per_token_above_200k_tokens_priority": 3.24e-05,
         "cache_read_input_token_cost_priority": 3.6e-07,
         "cache_read_input_token_cost_above_200k_tokens_priority": 7.2e-07,
+        "cache_read_input_token_cost_flex": 2e-07,
         "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",
-        "google_maps_grounding_cost_per_query": 0.014
+        "google_maps_grounding_cost_per_query": 0.014,
+        "input_cost_per_token_flex": 1e-06,
+        "output_cost_per_token_flex": 6e-06
     },
     "gemini-3-flash-preview": {
         "cache_read_input_audio_token_cost": 1e-07,