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Alex
Alex

Posted on Originally published at saas.pet

Gemini Advanced review: 1M context window changes everything in 2026

#ai #llm #gemini #productivity

Gemini Advanced review: 1M context window changes everything in 2026

I've been using Gemini Advanced daily for 6 months. Here's my honest take on what it does well, where it fails, and whether the 1M token context window is actually useful.

What I use Gemini Advanced for

Every morning, I feed Gemini Advanced entire books, technical papers, or my saas.pet's analytics reports (CSV exports ~50K rows). Then I have a conversation about them.

The 1M token context window makes this possible. For context:

  • 1M tokens ≈ 1,500 pages of text
  • Or about 3,000 lines of code
  • Or about 50K rows of tabular data

This is genuinely useful for:

  • Document analysis — feed it a 200-page PDF, ask specific questions
  • Code review — paste an entire codebase, ask for architectural feedback
  • Research synthesis — feed it 20 papers, get a meta-analysis

Where Claude and ChatGPT are still better

Let me be specific, because most reviews gloss over this:

  • Claude Sonnet 4.5 has better writing style. When I need polished prose, Claude wins.
  • ChatGPT has the best "thinking out loud" UX. For brainstorming, it's ChatGPT.
  • Gemini Advanced has the best raw context + image understanding (it's multimodal natively).

For pure reasoning, Gemini Pro 2.5 scores higher than both on benchmarks I've tested.

The pricing reality

Plan Price What you get
Free $0 Gemini 2.0 Flash, limited context
Advanced $20/mo Gemini 2.5 Pro, 1M context, Deep Research
Workspace $24/mo Same as Advanced + Gmail/Docs integration

I pay $20/mo. It's worth it for me because document analysis is my #1 use case.

What it fails at

  • Code generation: not as good as Claude Sonnet 4.5 for production code
  • Speed: Gemini Pro responses are noticeably slower than Flash
  • API reliability: occasional 503 errors during peak hours

Who should use it

If you regularly deal with documents over 100 pages, codebases over 50K lines, or research with 20+ papers — Gemini Advanced is the best tool for the job. If your primary use case is chat or coding, stick with Claude or ChatGPT.

Full 4,000-word review with benchmarks, alternatives, and a comparison table:

🔗 https://saas.pet/reviews/gemini-google-review/

I publish weekly AI tool reviews at saas.pet. I pay for every tool I review — no sponsorships, no free review accounts.

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