Used GLM 5.3 Flash for Code

A developer used OpenRouter to run GLM 5.3 Flash on two Rust functions generated from written specs, paying about $0.03 total for the work. The developer reported the model coded the functions well, worked quickly, and produced optimizations better than the original versions, concluding that generating code from a handful of specs via chat on OpenRouter is cost-efficient even with models like GPT-6-Sol.

Yesterday I wrote 2 more specs for my program, and needed a LLM to generate the code . I used OpenRouter and decided to try out GLM 5.3 Flash . My total bill for the endeavor came out to about 3 cents $0.03 . After using GLM 5.3 Flash I can see why some people want to buy expensive computers and run it locally all day—it is a nice model . It coded the functions well, and worked quickly. Both of the Rust functions were optimized in ways better than the original versions. Some notes on spec-driven development: • There is a "complexity level" that is ideal. • Writing a complete spec for a simple function is kind of a waste of time; and code that is too complex also needs more than a single specification. • Using a handful of specs and generating code for them via chat on OpenRouter is surprisingly cost-efficient, even with models like GPT-6-Sol.