Ask HN: What have you built with LLMs?

Ultimately I wanted a whole marketplace where anybody can create a tour and then sell it.

But the process of creating the tours was quite laborious.

So to speed this up I fed GPT-4 information about local points of information and had it write the questions and the multi choice answers. It also wrote some narrative bits as various personas. For example, there was a Christmas hunt where GPT4 played the part of an elf and came up with a theme about Santa needing to recruit you to be a new elf, once you’d answered all the various clues etc.

Front end is React Typescript, backend is Net Core Web API on Linux with MySQL under EF Core and also integrations with GPT4 and Stripe.

It’s hosted at treasuretours.org

Only superusers can access the AI tools right now because cost, but you can try out some of the pre-made hunts which were partially AI generated.

https://codifyhq.com

Here's the story:

At first I was building a tool for stock analysis- the user writes in free language what companies they want to compare, along with a time period, and their requested stocks show up on a graph. They can then further reiterate on it- add companies, and change range all in free language (I had many more analysis functions planned). Following some unique dev challenges I've found- I ended up not releasing the product (possibly will sometime in the future..), and switched to work on a dev platform to help with these challenges.

I was using what I called 'LLM structured task'- basically instructing the LLM to perform some task on the user input, and outputting a json that my backend can work with (in the described case- finding mentioned companies and optional time range, and returning stock symbols, and string formatted dates). The prompting has turned out to be not trivial, and kind of fragile- things broke with even minor iterations on the prompt or model configurations. So- I developed a platform to help with that- testing (templated) prompt versions, as well on model configurations on whole collections of inputs at once- making sure nothing breaks in the development process (or after). * If you're interested, welcome to check it out on https://www.promptotype.io

Followed you on Github, I'm looking at moving (back) to Japan in two years, likely to start a bootstrapped startup business and always good to have dev friends!