Surviving the "AI Context Brain Fog" in Feb 2026: How do you trust Gemini for non-expert research?

Hey everyone,

The context window in my subscription is technically massive (1M+ tokens), but I’m still seeing reports - and feeling the effects - of the "memory decay" or "brain fog" after just 15 to 20 back-and-forth turns.

Here’s my dilemma: I often use Gemini to dive into complex topics where I am NOT an expert. This makes the long-thread "decay" problematic. If the model starts losing its logic or hallucinating due to context fragmentation after 20 prompts, I don’t always have the domain knowledge to catch the errors. I want to dive into rabbit holes with my AI, not just use it as a replacement for a one-off question which I can just use the new AI feature on Google search instead, for free.

To the power users here:

• The "Audit" Workflow: How do you verify the integrity of a long conversation when you aren't an expert in the subject? Do you have a specific "sanity check" prompt you use every 10 turns?
• Deep Think Mode: Have you found that switching to the new "High Reasoning/Deep Think" parameters helps maintain the thread’s logic, or does it just make the "fog" more polite?
• Hard Resets: At what point do you just give up, start a new chat, and feed the previous summary back in?

I’m struggling with the "Trust Gap" in long sessions. Would love to hear your tactical workflows for staying on the rails!

This is not a big deal for relaxing conversations but I am using my AI for client work as well. Right now I see in my chat log that I have reverted to mostly very short chats with just a handful of questions before I stop the conversation and continue manually on my own.

I see and hear in various podcasts and news that AI is solving various decades old math problems and crushing tasks in medicine and physics. Meanwhile my chatbot forgets my initial question (which is very important for the whole thread) after a short while.

How are those other guys working with their AI to do all that? Do I need to start working with RAG / NotebookLM or other companion apps and connect to the Gemini API and start to pour money into token credits to have any kind of long form meaningful reliable project conversation? Currently it feels like I am driving a Ferrari that can crash every other mile unless I keep my eyes constantly on the rear view mirror looking for dropped parts or oil leakage on the road behind me. :D