This is highly disappointing from Google.
Gemini 4 Argon is exclusive to Ultra users in Antigravity, while Pro users can access it in the Gemini app.
So Google expects developers on the $20 Pro plan to use a chatbot for coding instead of Antigravity?
Even OpenAI and Claude offer their best models on $20 plans. I genuinely don't understand why Google made such a massive blunder.