Almost every knowledge-work domain now has a decent tool. Harvey and Legora for legal. Rogo for finance. All decent and all narrow and not accessible to everyone.

Coding has something the rest of knowledge work doesn't: harnesses. Cursor CLI, OpenCode, Codex, Claude Code general-purpose agents that turn a model into a real force multiplier.

So where's the equivalent for everyone else? Why is there no publicly available harness that's a genuine upgrade over Claude Code or Codex for the deliverables professionals actually ship Excel models, research reports, decks, PDFs?

That's what we built at Associium.

We're rolling out a feature that lets you vibecode Excel models, the same category a well-funded Silicon Valley startup has been getting attention for. Building it out, we realised we don't just match what's currently considered best. We beat it.

Here's our output for the prompt "build a detailed LBO model for ExxonMobil": https://docs.google.com/spreadsh...

Run that same prompt on any other platform and the gap is hard to miss.
Here is what claude had to say about our results vs others:
https://claude.ai/public/artifac...

How we did it: we generate Excel server-side instead of client-side, using openpyxl as the engine. We built on top of it to support pivot tables and everything else a real model needs. The reasoning behind the bet: openpyxl is heavily represented in training data, so the model actually knows how to drive it. That's the difference between a spreadsheet that looks right and one that is right.

Hey Product Hunt

We built Associum for professionals and firms who are tired of AI tools that look impressive but stop short of actually doing the work.

Here is what Associum does: