I think it’s simply a matter of dogfooding and new feature development, they do have much higher velocity than companies of equivalent size and an unlimited token budget helps as well.
I do believe this will force the AI labs to eventually solve the bloat problem with AI, but we’re definitely not there yet.
Give a verifiable benchmark for the AI agent to hit such as reduce token processing time by 5% without affecting output.
Kernels, performance-required stacks etc. is different, so you optimise them for that.
It feels like OpenAI and Anthropic have a ton of room to optimizing that regard, but they choose to rather focus on moving the frontier forward than doing things that are already possible in a more efficient way.
It's better than the ductape and glue pipelines that we had previous to this.
The software is the definition of plumbing no one cares about and testing it is trivial.