diff --git a/litellm/model_prices_and_context_window_backup.json b/litellm/model_prices_and_context_window_backup.json
index efc0e0e2877..f875936b0bf 100644
--- a/litellm/model_prices_and_context_window_backup.json
+++ b/litellm/model_prices_and_context_window_backup.json
@@ -69078,6 +69078,7 @@
         "source": "https://api.together.ai/v1/models"
     },
     "together_ai/google/gemma-4-31B-it": {
+        "deprecation_date": "2026-09-14",
         "input_cost_per_token": 3.9e-07,
         "litellm_provider": "together_ai",
         "max_input_tokens": 262144,
@@ -69207,6 +69208,7 @@
         "source": "https://api.together.ai/v1/models"
     },
     "together_ai/openai/gpt-oss-20b": {
+        "deprecation_date": "2026-09-14",
         "input_cost_per_token": 5e-08,
         "litellm_provider": "together_ai",
         "max_input_tokens": 131072,
diff --git a/model_prices_and_context_window.json b/model_prices_and_context_window.json
index efc0e0e2877..f875936b0bf 100644
--- a/model_prices_and_context_window.json
+++ b/model_prices_and_context_window.json
@@ -69078,6 +69078,7 @@
         "source": "https://api.together.ai/v1/models"
     },
     "together_ai/google/gemma-4-31B-it": {
+        "deprecation_date": "2026-09-14",
         "input_cost_per_token": 3.9e-07,
         "litellm_provider": "together_ai",
         "max_input_tokens": 262144,
@@ -69207,6 +69208,7 @@
         "source": "https://api.together.ai/v1/models"
     },
     "together_ai/openai/gpt-oss-20b": {
+        "deprecation_date": "2026-09-14",
         "input_cost_per_token": 5e-08,
         "litellm_provider": "together_ai",
         "max_input_tokens": 131072,