Gemini issues

Use the Gemini-native endpoint

Gemini CLI and Antigravity should use:

https://api.fhrouter.com/v1beta

Do not use /v1 unless the client specifically asks for OpenAI compatibility.

Set the model explicitly

Gemini CLI often works best when the model is explicit:

gemini -m gemini-3.1-pro-preview

Other model:

gemini -m gemini-2.5-pro

Environment variables override settings

Check for old values:

echo $GEMINI_API_KEY
echo $GOOGLE_API_KEY
echo $GOOGLE_GEMINI_BASE_URL

Windows PowerShell:

$env:GEMINI_API_KEY
$env:GOOGLE_API_KEY
$env:GOOGLE_GEMINI_BASE_URL

Unset or replace old values before retrying.

Request hangs or returns no text

Gemini tools can retry, stream, or make background requests. If a request hangs:

1. Stop the current run.
2. Start a fresh session.
3. Send one short prompt.
4. Check FHRouter usage before retrying a larger task.

IDE extensions

Some VS Code extensions support Gemini through either a Gemini-native mode or an OpenAI-compatible mode. For Gemini models, prefer Gemini-native mode and use /v1beta.