Reapply "fix: temporarily force sonnet model failover"

This reverts commit 3d955ee6f0ab66f2b42ccf8d65faa3646db9bcab.

chat_interface.py

@@ -152,6 +152,8 @@ def load_settings_values(settings_dict: dict, user_email: str = "") -> list:
         else:
             raw_value = settings_dict.get(storage_key, default)
             try:
+                if storage_key == 'default_llm' and raw_value not in UI_MODEL_CHOICES:
+                    raw_value = default
                 if converter == bool:
                     # Special handling: bool("False") returns True (non-empty string)
                     # We need to check the actual string value
@@ -335,7 +337,8 @@ class ChatDemoInterface:
                 if use_case and use_case not in ['analytics', '']:
                     defaults['use_case'] = use_case
                 if settings.get('default_llm'):
-                    defaults['model'] = settings.get('default_llm')
+                    saved_model = settings.get('default_llm')
+                    defaults['model'] = saved_model if saved_model in UI_MODEL_CHOICES else DEFAULT_LLM_MODEL
                 if settings.get('fact_table_size'):
                     defaults['fact_table_size'] = settings.get('fact_table_size')
                 if settings.get('dim_table_size'):
@@ -5596,6 +5599,8 @@ def create_chat_interface():
                 settings = load_gradio_settings(user_email)
 
                 model = (str(settings.get("default_llm", "")).strip() or DEFAULT_LLM_MODEL)
+                if model not in UI_MODEL_CHOICES:
+                    model = DEFAULT_LLM_MODEL
                 liveboard_name = str(settings.get("liveboard_name", "")).strip()
 
                 # Data Size — prefer new field, fall back to legacy fact_table_size
@@ -5808,7 +5813,8 @@ def create_chat_tab(chat_controller_state, settings, current_stage, current_mode
                 choices=list(UI_MODEL_CHOICES),
                 value=settings['model'],
                 interactive=True,
-                allow_custom_value=True
+                allow_custom_value=False,
+                info="Temporary model failover active: using claude-sonnet-4-6."
             )
 
             # Run-time settings — collapsible, all pipeline knobs here
@@ -6403,8 +6409,8 @@ def create_settings_tab():
         label="Default AI Model",
         choices=list(UI_MODEL_CHOICES),
         value=DEFAULT_LLM_MODEL,
-        info="Primary model for demo generation",
-        allow_custom_value=True,
+        info="Temporary model failover active: using claude-sonnet-4-6.",
+        allow_custom_value=False,
     )
     _ts_env_choices = get_ts_environments()
     default_ts_env = gr.Dropdown(

llm_config.py

@@ -10,18 +10,14 @@ from __future__ import annotations
 import os
 from typing import Tuple
 
+# Temporary emergency failover while OpenAI quota and Anthropic Opus limits are unavailable.
+# Do not rewrite saved user settings; route runtime/UI to the one currently working model.
+TEMPORARY_MODEL_OVERRIDE = "claude-sonnet-4-6"
+
 # Chat-capable models we expose in app dropdowns.
-DEFAULT_LLM_MODEL = "gpt-5.5"
+DEFAULT_LLM_MODEL = TEMPORARY_MODEL_OVERRIDE
 UI_MODEL_CHOICES = (
-    "claude-opus-4-7",
-    "claude-opus-4-6",
-    "claude-sonnet-4-6",
-    "claude-haiku-4-5-20251001",
-    "gpt-5.5-pro",
-    "gpt-5.5",
-    "gpt-5.4",
-    "gpt-5.2",
-    "gpt-5",
+    TEMPORARY_MODEL_OVERRIDE,
 )
 
 # Preserve compatibility with older saved values.
@@ -43,6 +39,8 @@ GOOGLE_MODEL_MAP = {
 
 def resolve_model_name(model_name: str | None) -> str:
     """Normalize user/config model names into canonical runtime model IDs."""
+    if TEMPORARY_MODEL_OVERRIDE:
+        return TEMPORARY_MODEL_OVERRIDE
     raw = (model_name or "").strip()
     if not raw:
         return DEFAULT_LLM_MODEL