That's right, it's about using a free LLM. You can even save on electricity.
If you go to Openrouter, you can use the HY3 free version, a model recently released by Tencent. Usually, if you use it a lot, it stops right away, but this model doesn't. It seems like there's almost no limit. I've been compacting and using 200k several times.
However, it's only free until July 21st.
▶ Original source: https://openrouter.ai/tencent/hy3:free