# Generated Code with GPT-6-Sol

> Source: <https://www.dotnetperls.com/2026_9_23_generated-code-gpt-6-sol>
> Published: 2026-09-23 07:00:00+00:00

I have recently been trying to replace some **Rust functions** with **specifications** written in Markdown. Then I can just use an LLM to generate the function according to the specification. I used a local model to generate the code correctly, but I decided to try some online models.

At first I tried **GPT-6-Luna**. It did not manage to generate correct Rust code. I then tried **GPT-6-Sol**, and it worked well—it took GPT-6-Sol less than a minute to generate the code for the 2 specs, while my local model took around an hour.

GPT-6-Sol **cost** me about $0.07 (7 cents) for the 2 code generations I did. Meanwhile, my local model, which ran for about 60 minutes at 100% GPU usage, likely cost me as much as $0.05 in **electricity** (5 cents). So I did not save much money by using a slower, weaker model at home.

I had GPT-6-Sol generate more **optimized code** as well, so the task was a success. Getting used to **spec-driven development** will take some time, but I have had promising results so far—it seems like a big, powerful model can generate code from these specs, while a weaker, local model could be used for maintaining glue code in the rest of the program.