[Bug]: Vertex AI (Gemini) requests not showing logs or token/cost metrics in dashboard

[droid-ash]

What happened?

I’m using Helicone with Google Cloud’s Vertex AI (Gemini-2.5-pro-preview) provider, but none of my Vertex AI calls are appearing in the dashboard logs – token counts and cost remain at zero. OpenAI (gpt-4o) calls work fine (see green box), but every Gemini request shows success with 0 tokens and $0.00000 cost (see red box).

Screenshots:

Steps to Reproduce:

1. Create or select a Google Cloud project and enable Vertex AI.
2. Configure Helicone with your Vertex AI credentials (e.g. via environment variables).
3. Send a simple request to Gemini (e.g. gemini-2.5-pro-preview-03-25)
4. Open the Helicone dashboard → Requests.

Observed Behavior:

• Vertex AI (Gemini) requests appear with status “Success”
• Input Tokens, Output Tokens, Total Tokens all show “0”
• Cost is always $0.00000
• No detailed logs or metrics for the call

Expected Behavior:

• Dashboard should log input/output token counts for Vertex AI calls
• Estimated cost should reflect actual token usage
• Behave the same way as it does for the OpenAI provider

Environment:

1. Helicone version: e.g. v1.2.3
2. Google Cloud SDK / Vertex AI enabled
3. Model tested: gemini-2.5-pro-preview-03-…
4. Helicone integration: environment variables / hosted
5. Browser + OS: e.g. Chrome 120 on macOS Ventura

[TechKemon]

the same case is happening for 4o with me, nothing appears

[connortbot]

closing this since we added support for Vertex and Gemini models. cc @droid-ash

[droid-ash]

Thanks @connortbot