> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tinypixel.web.id/llms.txt
> Use this file to discover all available pages before exploring further.

# Limitations & Tips

> Important constraints and best practices when using the Gemini API.

# Limitations & Tips

## Limitations

* Each request is **single‑turn only**; multi‑turn context is simulated by including previous messages in the prompt.
* Rate limits exist because Google may throttle high‑frequency requests; the server retries automatically.
* To use the Pro model (`gemini-3.1-pro`) you need a Gemini Advanced (paid subscription) cookie; otherwise it falls back to Flash.
* Image upload may require cookies; configure a Gemini cookie if you encounter empty responses.
* The free tiers of the hosting platforms have daily request limits; monitor usage to avoid service interruption.

## Tips

* For production, consider setting your own API key instead of the default `now-and-then` and monitor your usage.
* If you encounter `HTTP 429: Too Many Requests`, configure a valid Gemini cookie (`COOKIE_STRING` and `SAPISID` environment variables) to improve reliability.
* If you see `HTTP 405: Method Not Allowed`, update the `GEMINI_BL` environment variable to the latest build tag (see the “Updating BL Version” section in the platform-specific guides).
* The Pro model requires a paid Gemini Advanced cookie; without it, `gemini-3.1-pro` routes to the same Flash model.
* For image inputs, ensure your cookie is set if anonymous upload fails.
* Use the health endpoint (`/health`) to verify your deployment is running correctly.