## Changes Made Updated research mode to use sonar-deep-research model: ### Files Modified - **backend/routers/queries.py:51-55**: Updated `_get_model_for_mode()` mapping from 'sonar-pro' to 'sonar-deep-research' for research mode - **backend/perplexity_client.py:30-34**: Updated `MODEL_MAP` from 'sonar-pro' to 'sonar-deep-research' for research mode - **backend/perplexity_client.py:153**: Updated comment to reflect reasoning_effort now applies to both research and labs modes ### Tests Updated - **backend/tests/test_queries_api.py:733-754**: Renamed test and updated assertion to expect sonar-deep-research - **backend/tests/test_async_queries.py:619-642**: Same test rename and assertion update ### Verification - All 281 tests pass - Both research and labs modes now use sonar-deep-research model - Search mode still correctly uses sonar model - reasoning_effort parameter is correctly passed for sonar-deep-research model ### Commit 5217e2d - Merged to main and pushed to remote