The "novel AGI code" probably accounts for <5% of work by time spent. If they can reduce the remaining 95% of grunt work (wiring yet another DB query to a frontend, tweaking the build pipeline, automating GPU allocation scripts) then that means they can focus more on that 5%.

Then it looks like Company A spends 90% of time on novel research work (while LLMs do all the busy work) and Company B spends 5% of time on novel research work.