Use Gemini in Zed

Steps

1. 1
   Step 1.

   Go to Google AI Studio and create an API key.

2. 2
   Step 2.

   Open Agent Settings with agent::OpenSettings and go to the Google AI section. Enter your Google AI API key. Zed reads GEMINI_API_KEY, falling back to GOOGLE_AI_API_KEY, from the local Zed process environment.

3. 3
   Step 3.

   Optional: add custom Google AI models when you need a specific Gemini model version. Zed's documented example is below; add an entry with a current id such as gemini-3.8-flash the same way.

   JSON

   Copy

   {
     "language_models": {
       "google": {
         "available_models": [
           {
             "name": "gemini-3.1-pro-preview",
             "display_name": "Gemini 3.1 Pro",
             "max_tokens": 1000000,
             "mode": {
               "type": "thinking",
               "budget_tokens": 24000
             }
           },
           {
             "name": "gemini-3-flash-preview",
             "display_name": "Gemini 3 Flash (Thinking)",
             "max_tokens": 1000000,
             "mode": {
               "type": "thinking",
               "budget_tokens": 24000
             }
           }
         ]
       }
     }
   }