Skip to content



Ultra-fast PostHog analytics with Jev, AI SDK + json-render

PostHog analytics in a chat - powered by Jev How we read PostHog data without opening PostHog Fast, cheap PostHog analytics with Jev + Vercel Labs JSON rendering Generative analytics UI on top of P…

Frequently asked questions

What is Javelin and why does Roboto use it?
Javelin is one of the fastest AI models available right now, and it's cheap too. We use it because it does the job without unnecessary complexity. The speed and cost efficiency let us focus on what matters: getting accurate answers from our data quickly.
How fast is the demo you showed with PostHog data?
When I asked how many people visited the home page today, Javelin answered almost instantly with the correct number, 42 visitors. The only delay was pulling the data from PostHog itself, not the model processing it. That's the kind of performance we're talking about.
What other tools are you using besides Javelin?
We're using Vercel Labs JSON rendering for the UI and GPT Luma for the chat component. The combination of these tools lets us build fast, readable interfaces that pull live data from PostHog and display results instantly without any bloat.
Do you need a data analyst to use this setup?
Not necessarily. The interface makes it easy enough for anyone to ask questions about the data and get clear answers back. Of course, you can hire a data analyst if you want to, but this setup eliminates that requirement for basic queries.
Why does Vercel Labs JSON rendering matter for this?
Vercel Labs JSON rendering is amazing because it handles dynamic data rendering efficiently. You can see how fast the UI updates, how easy it is to read the results, and it scales well without requiring heavy engineering on the frontend.
What makes Javelin different from other AI models?
Javelin is cheap and fast, and it just works. There's no unnecessary processing or overhead. It makes decisions clearly and gets you the answer you need without any bells and whistles, which is exactly what we need when we're moving fast as a team.
Can you use this approach for other use cases beyond analytics?
Yes, the setup is flexible enough for various use cases where you need to query data and get fast, clear answers. The main selling point is the combination of speed and cost, so any scenario where those matter is a good fit for this approach.


Continue watching

Get in touch

Tell us what you're building. We reply within one working day. Jono or someone on the team picks up every message personally.

By sending this you agree to our privacy policy. We only use your details to reply.