diff --git a/src/strands/experimental/bidi/models/__init__.py b/src/strands/experimental/bidi/models/__init__.py
index cc62c9987..6e5817046 100644
--- a/src/strands/experimental/bidi/models/__init__.py
+++ b/src/strands/experimental/bidi/models/__init__.py
@@ -1,5 +1,7 @@
 """Bidirectional model interfaces and implementations."""
 
+from typing import Any
+
 from .model import BidiModel, BidiModelTimeoutError
 from .nova_sonic import BidiNovaSonicModel
 
@@ -8,3 +10,22 @@
     "BidiModelTimeoutError",
     "BidiNovaSonicModel",
 ]
+
+
+def __getattr__(name: str) -> Any:
+    """
+    Lazy load bidi model implementations only when accessed.
+    
+    This defers the import of optional dependencies until actually needed:
+    - BidiGeminiLiveModel requires google-generativeai (lazy loaded)
+    - BidiOpenAIRealtimeModel requires openai (lazy loaded)
+    """
+    if name == "BidiGeminiLiveModel":
+        from .gemini_live import BidiGeminiLiveModel
+
+        return BidiGeminiLiveModel
+    if name == "BidiOpenAIRealtimeModel":
+        from .openai_realtime import BidiOpenAIRealtimeModel
+
+        return BidiOpenAIRealtimeModel
+    raise AttributeError(f"cannot import name '{name}' from '{__name__}' ({__file__})")