[WORKAROUND] Antigravity IDE: Bypass 429 / Failed to send with v1.16.5 + Gemini 3.1 Pro

[haruhito]

For anyone completely blocked by 429 RESOURCE_EXHAUSTED or Failed to send errors:

Rolling back to Antigravity v1.16.5 and switching the model to Gemini 3.1 Pro bypasses the issue.

Environment Details:

バージョン: Antigravity
コミット: 1.16.5
日付: 1.107.0 (user setup)
Electron: 1504c8cc4b34dbfbb4a97ebe954b3da2b5634516
ElectronBuildId: 2026-02-02T23:37:17.781Z
Chromium: 39.2.3
Node.js: 142.0.7444.175
V8: 22.21.1
OS: 14.2.231.21-electron.0

Tested Results on v1.16.5:

• Gemini 3.1 Pro (Low): Working normally (thinking process & agent responses succeed - see screenshot 1)
• Gemini 3.6 Flash (High): Fails immediatelyfailed (see screenshot 2)

If you have urgent work, make sure to both roll back to 1.16.5 and select Gemini 3.1 Pro.