There are many agentic IDE options for software developers. For one, they are all forks of Visual Studio Code, and then they add AI chat and agents based on a set of AI models and harnesses. They also have to manage something called the context window. Most models are paying attention to about 200k tokens, and those tokens cost you extra money. But, if the context window is full of random things, or out-of-date parts of the conversation, or a bunch of error messages. And, when you start a new conversation, the model has to build context to help solve the problem.
The latest agent IDE is called Antigravity by Google. It is based on their top coding model, Gemini 3, and their own agent framework. It is brand new, and people are crushing it with requests; they are making frequent updates and fixing bugs.
I noticed when I started a new chat for my project, Antigravity thought about my request and opened a “brain” file. It looks to be some markdown that Antigravity is managing as I work on the project. This seems like a smart idea and might be where Google can differentiate itself from the competition.
