BREAKING: ChatGPT got an upgrade & no one cares.

But 5.2 is the biggest release of the year:

✦ Jump from 38% to 74% on knowledge work tasks.

✦ Context window now absorbs 700 pages of PDFs.

✦ The hallucination rate went from 8.8% to 6.2%.

✦ Its vision is nearly as good as a human's (88%).

TL:DR - it's not the same league as the previous 5.1.

I wrote a guide here: ruben.substack.com/p/52.

To test it, here are my top 3 prompts:

Prompt: Make a real Excel file.

Build an Excel workbook (.xlsx) from the assumptions below.

Tabs:
1) Inputs (assumptions + 3 scenarios: Base/Downside/Upside)
2) Model (monthly for 12 months)
3) Dashboard (3 charts + 6 KPIs)

Assumptions:
- Starting revenue: $120,000 MRR
- Growth: Base 8% MoM, Downside 4%, Upside 12%
- Churn: Base 3% MoM, Downside 5%, Upside 2%
- CAC: $35 per new subscriber
- ARPU: $6/mo
- Fixed costs: $45,000/mo
- Variable costs: 6% of revenue

Rules:
- No hard-coded numbers outside Inputs.
- Show formulas clearly.
- Output the .xlsx file.

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Prompt: Paste a long doc. Catch contradictions.

I’m going to paste a long document.

Your job:
1) Extract a 12-bullet factual summary. Each bullet must include an exact quote + where it came from (section heading or nearby text).
2) List contradictions or unclear claims (at least 8). For each: quote both sides.
3) Make a decision memo:
 - What we know (facts only)
 - What we don’t know (explicitly)
 - Risks (top 5)
 - Next actions (top 7, owner + deadline placeholders)

Rules:
- If a detail is missing, write “Not stated”.
- Do not guess.

Ready? Say: “Paste it.”

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Prompt: Upload a screenshot. Tell me what’s wrong.

I will upload ONE screenshot of a dashboard, analytics page, or UI.

Do this:
1) Tell me what I’m looking at in 2 sentences.
2) Extract the 10 most important numbers/labels you can read (verbatim).
3) Diagnose 3 likely issues or opportunities (ranked).
4) Give a 7-step click-by-click plan for what to check next.
5) Write a 5-line Slack update I can send to my team.

Rules:
- Only use what you can see. If unreadable, say “Can’t read”.
- Ask up to 3 clarifying questions only if truly needed.

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I don't see any post about GPT 5.2.

It's almost as if people are done with new releases.

And I get it.

But this time it's different. I would even go so far as to say GPT-6 will be a version of GPT-5.2, but faster.

If you want to see more tests from me, consider ♻️ restacking this video. It helps keep my content free.