Antigravity Agent execution fails on Gemini and GPT models

Google Antigravity
1

Since today, I have been unable to use Antigravity Agent with Gemini or GPT models.

When using Gemini, the Agent immediately terminates with:

Agent execution terminated due to error.
Trajectory not found: <trajectory-id>

When switching to GPT, I get:

Our servers are experiencing high traffic right now, please try again in a minute.

However, Claude works normally. I was able to use Claude until I reached my usage limit.

I have already tried the following:

  • Deleted all previous conversations.
  • Created a completely new project/workspace.
  • Started a new conversation.
  • Tried multiple models.
  • Restarted Antigravity.
  • Updated Antigravity to the latest available version today.

The problem occurs even in completely new projects, so it does not appear to be related to a specific workspace, project, Git repository, or previous conversation.

At the moment, Gemini and GPT are unusable, while Claude was working normally until its usage limit was reached.

Could you please confirm whether this is a known server-side/backend issue or a problem with the current Antigravity release?

2

And I was wondering what happened, I’ve already downloaded the new version twice, restarted my computer, and nothing is working.

3

Same here. I downloaded previous versions and cleared the app cache. I saw some suggestions that it might be related to MCP, but I don’t use MCP. Anyway, if you find a solution, please let me know.

4

The solution is to use a VPN. But Google is having some kind of autumn flare-up: a couple of queries work, and then that error pops up again. Switzerland worked the longest. The Netherlands and Germany get blocked immediately. I tried some Asian countries — it doesn’t want to work at all. The US and Canada work every other time.

5

I’ve been testing with a fixed IP from the US since yesterday and I still get the same error. Only the Claude model works for me, the others give an error.