Google Gemini Deep Research very powerful free option. 10 research/month.

Initial usage (English, French, German, Catalan) provided excellent results for both crawling, analysing the various language sites, sources and generate the report in the asked language.

Google Gemini Canvas also with strong improvements. Google can leverage the massive Googleplex and propose free AI same as China Giants.

Recommended for any complementary research (or primary research start ).

Alternative ChatGPT deep research 23€/month. OpenAI would have to leverage main stakeholder Microsoft massive cloud (azure infrastructure).

However all providers have AI managed load throttling and load balance, electricity cost (and prime time peak consume) is likely main levelling parameter.