The Gen-Eval Loop: Getting Quality Outputs from LLMs

Sat, 08 Aug 2026 07:30:50 +0000

Introduction Link to heading

A single prompt to an LLM is a guess. Sometimes it works, but often you end up doing the judging yourself: read the output, figure out what’s wrong, prompt again. I wanted to see what happens when an LLM does that judging step too, so both sides keep going back and forth until the work is actually good.

That’s the idea behind the gen-eval loop. A generator produces something. A separate evaluator grades it against a rubric. The loop repeats with that feedback until the evaluator says pass, or a turn budget runs out. Credit to my colleague Nikhil Prasad for introducing me to this pattern.

Agentic-Ai on life-lessons.in

The Gen-Eval Loop: Getting Quality Outputs from LLMs

Introduction Link to heading