Antigravity Add Model FAQ
Thirteen real questions from the repo's issue tracker and documentation — supported versions, providers, rate limits, and costs. Every answer links its source. New to the patch? Start with the quickstart.
Which Antigravity versions are supported?
The standalone Windows IDE 2.5.5 is the verified release. The patch is version-sensitive — always run node scripts/deploy.mjs --check before installing, and re-check after every Antigravity update.
Source: Compatibility guide
Do file-tool parameters work with custom models?
Some model configurations may need adjustments to tool parameters. The proxy normalizes common cases, but check the issue tracker for your specific tool.
Source: Issue #7
Can I use Cloudflare Workers AI models?
Yes. Workers AI preset ships with the addon, using the OpenAI-compatible endpoint. Schema-bounded tools are normalized before forwarding requests.
Source: Issue #10
Does DeepSeek vision work?
Vision inputs for non-image fileData were added in a recent commit. Check the current compatibility guide for which models support image inputs.
Source: Issue #11
What about rate limits and fallback chains?
Paid Workers AI models are rate-limited to 20 requests per minute per account, per model. Fallback chains let a failed request try other saved models in order — each model has its own bucket.
Source: Issue #16
The installer reports NOT_SUPPORTED or UNSUPPORTED_RUNTIME — what do I do?
Confirm you have the standalone desktop app and check the compatibility guide. The VS Code-based Antigravity IDE uses a different installer.
Source: Compatibility guide
I see a black screen after an Antigravity update — how do I fix it?
Follow the startup recovery procedure in the compatibility guide. Avoid restoring an arbitrary older archive; use the version-specific backup the installer keeps.
Source: Recovery procedure
A model is missing from my picker — what happened?
Check that it is enabled, saved, and using the correct provider model ID. Also verify your API URL and that the model is available on your account.
Source: Configuration reference
My provider returns 401, 403, or 404 — what does that mean?
Check your credentials, account access and location, the API URL, and model availability. A 405 on model listing is expected for some providers — configure the model manually.
Source: Provider guide
Port 50999 is occupied — what should I do?
The patched language server requires this fixed port on Windows. Close the other instance that is using it.
Source: Compatibility guide
TLS connection fails — what do I check?
Check the endpoint certificate and your trusted CA configuration. If you use a custom CA, ensure the system trust store includes it.
Source: Configuration reference
Can I use Antigravity without a Google account?
No — Antigravity itself requires a Google account; the patch adds your providers on top. You still sign in to Antigravity normally.
Source: GitHub repo
Is it free?
The patch is Apache-2.0 licensed. You pay only your own providers — OpenRouter, Ollama, or any API you already have.
Source: LICENSE (Apache-2.0)
These answers cite the repo's documentation and issue tracker. If your question isn't here, open an issue.