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LLMs reward expertise

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Why This Matters

This article highlights that expertise in a specific domain remains crucial when working with LLMs, as skilled prompting can significantly enhance the quality of outputs. It emphasizes that the true value lies in the user's knowledge, which guides the model effectively, rather than relying solely on the model's capabilities. For the tech industry and consumers, this underscores the importance of domain expertise in leveraging AI tools to achieve optimal results.

Key Takeaways

In the 2010s, if you had technical gaps (say, you couldn’t write CSS), you had to either rely on a skilled colleague or just hope that the answer to your exact problem was out there on the internet. Today, everyone can write sort-of-okay CSS by delegating the task to an LLM. LLMs make everybody into a generalist.

Because of this, lots of people don’t think there’s any skill involved in working with LLMs. If you want the product that LLMs can deliver — PhD-level mathematics, pretty good but sometimes tasteless computer code, or awkward LinkedIn-style writing — you can simply ask for it. Since everyone is talking to the same models, “skilled prompters” are getting the same results as people touching LLMs for the first time.

This is wrong. The most important skill in prompting is expertise in the domain you’re prompting for.

A good illustration of this is Terence Tao’s conversation with ChatGPT about the recently-discovered counterexample to the Jacobian Conjecture. This is not the same ChatGPT I talk to! I couldn’t get to where Tao gets, even with unlimited tokens to burn.

There’s a lot to learn about good prompting from Tao’s conversation. Here are a few observations:

Tao’s messages are very short and to-the-point. He doesn’t respond point-by-point to the model, just to the gist

The model outputs are much more concise than when I try and talk to GPT-5.6 Sol about mathematics. By signalling expertise, Tao shunts the model into “talking-to-mathematicians” mode, not “explaining-to-amateurs” mode

Tao pushes back when the model’s responses look wrong, but he doesn’t directly contradict; instead, he says things like “this looks more complex than I was hoping for”

Tao makes several leaps and suggestions himself. He almost never takes the model’s advice about where to go next

However, you can’t prompt like Tao on mathematical questions just by following these tips. The key to his technique is actually understanding the mathematics: pulling the relevant idea out of ChatGPT’s multi-paragraph response, suggesting alternate approaches or formulations, and identifying what “looks weird”.

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