In the research literature this is generally called coconut after the first paper published on the idea. It has advantages and disadvantages. I agree it’s more efficient. But the lack of observability and transferability are real downsides that block its adoption.
the point is it may be a feature. most providers don't want clients reading those and almost nobody provide thinking text anymore.
> almost nobody provide thinking text anymore.
Isn't the goal to be able to "debug" and identify alignment issues?
Exactly. This is how the Huggingface incident was reconstructed. But GPT-6 uses partially Neuralese, and its monitorability has dropped sharply according to benchmarks.
Another reason to switch off a central provider to open models as quickly as possible.