diff --git a/litellm/model_prices_and_context_window_backup.json b/litellm/model_prices_and_context_window_backup.json
index 02df6897b41..30b08e54410 100644
--- a/litellm/model_prices_and_context_window_backup.json
+++ b/litellm/model_prices_and_context_window_backup.json
@@ -50868,7 +50868,7 @@
     "vertex_ai/google/gemma-4-26b-a4b-it-maas": {
         "input_cost_per_token": 1.5e-07,
         "litellm_provider": "vertex_ai-openai_models",
-        "max_input_tokens": 256000,
+        "max_input_tokens": 262144,
         "max_output_tokens": 128000,
         "max_tokens": 128000,
         "mode": "chat",
diff --git a/model_prices_and_context_window.json b/model_prices_and_context_window.json
index 02df6897b41..30b08e54410 100644
--- a/model_prices_and_context_window.json
+++ b/model_prices_and_context_window.json
@@ -50868,7 +50868,7 @@
     "vertex_ai/google/gemma-4-26b-a4b-it-maas": {
         "input_cost_per_token": 1.5e-07,
         "litellm_provider": "vertex_ai-openai_models",
-        "max_input_tokens": 256000,
+        "max_input_tokens": 262144,
         "max_output_tokens": 128000,
         "max_tokens": 128000,
         "mode": "chat",
diff --git a/tests/test_litellm/llms/vertex_ai/vertex_ai_partner_models/gemma/test_vertex_ai_gemma_global_endpoint.py b/tests/test_litellm/llms/vertex_ai/vertex_ai_partner_models/gemma/test_vertex_ai_gemma_global_endpoint.py
index e9b58622a4b..85a2124ab02 100644
--- a/tests/test_litellm/llms/vertex_ai/vertex_ai_partner_models/gemma/test_vertex_ai_gemma_global_endpoint.py
+++ b/tests/test_litellm/llms/vertex_ai/vertex_ai_partner_models/gemma/test_vertex_ai_gemma_global_endpoint.py
@@ -30,7 +30,7 @@ from litellm.types.llms.vertex_ai import VertexPartnerProvider
 _GEMMA_MODEL_COST_ENTRY = {
     "vertex_ai/google/gemma-4-26b-a4b-it-maas": {
         "litellm_provider": "vertex_ai-openai_models",
-        "max_input_tokens": 256000,
+        "max_input_tokens": 262144,
         "max_output_tokens": 128000,
         "max_tokens": 128000,
         "mode": "chat",
@@ -180,6 +180,15 @@ class TestCreateVertexURLGemma:
 # ---------------------------------------------------------------------------
 
 
+def test_gemma_maas_context_window_matches_google(local_model_cost_map):
+    info = litellm.get_model_info("vertex_ai/google/gemma-4-26b-a4b-it-maas")
+
+    # 262,144 context length and 128,000 maximum output per Google's model page, checked 2026-09-18:
+    # https://docs.cloud.google.com/gemini-enterprise-agent-platform/models/maas/google/gemma-4-26b-a4b-it
+    assert info["max_input_tokens"] == 262144
+    assert info["max_output_tokens"] == 128000
+
+
 # ---------------------------------------------------------------------------
 # Integration tests: verify payloads reach the global OpenAI endpoint
 #