For Gemini you should use either the latest experimental model (gemini-exp-1206) which should become 2.0 Pro, or 2.0 Flash (a released model). The 1.5 Pro model

For Gemini you should use either the latest experimental model (gemini-exp-1206) which should become 2.0 Pro, or 2.0 Flash (a released model). The 1.5 Pro model is way behind.