[Bug] Persistent "Model unavailable" loop on Gemini 3.7 Flash High (Pro Account)

Google Antigravity
,
1

Issue Overview: I am encountering a persistent connectivity error while using the Gemini 3.7 Flash High agent on Antigravity. I am an active Pro Plan subscriber.

Error Message: "Model unavailable, retrying in 3s (attempt 2/9), Agent execution terminated due to error."

‪Greeting The Engineer - m...‬ 30_09_26 08_48_11 م
‪Greeting The Engineer - m...‬ 30_09_26 08_48_11 م1366×728 27 KB

Steps to reproduce / Behavior:

  1. Select the Gemini 3.7 Flash High agent/model.

  2. Submit any prompt.

  3. The request hangs and enters an infinite retry loop without ever completing.

  4. Workaround: Changing the agent/model to a different one immediately resolves the issue and prompts are processed normally.

Environment Details:

  • Account Tier: Pro Plan

  • Affected Model/Agent: Gemini 3.7 Flash High

It seems like the request pool or API route for this specific high-reasoning agent is hitting a bottleneck or server-side failure.

I have attached a screenshot showing the error interface. Any insights or fixes from the team would be greatly appreciated!

‪Antigravity‬ 29_09_26 07_55_54 م (2)
‪Antigravity‬ 29_09_26 07_55_54 م (2)1051×574 4.46 KB

2

Hi @bito_bobli,

Thanks for the screenshots! “Model unavailable” means Gemini 3.7 Flash High couldn’t respond at that moment. That’s on our side, not your account, which is why switching models works.

I also noticed this conversation is quite long (2 days, with many steps), and you’re asking it to continue. Very long conversations can sometimes keep failing on one model. Please try:

  1. Start a new conversation with Gemini 3.7 Flash High, give a short summary of where you left off, and continue from there.
  2. If it still fails, use another model for now and try High again later.
  3. Update Antigravity to the latest version.

If the new conversation hits the same error too, let us know!.