800 Million Weekly Users?! ChatGPT Just Redefined “Explosive Growth”

Just a couple of months ago, I reported that ChatGPT had crossed 100 million new weekly users between December and February. That was already staggering — more than the entire population of the UK jumping online with AI in a matter of weeks.

But while I was off-grid on a family adventure along the West Coast of America (which I highly recommend, by the way), ChatGPT pulled off something even wilder.

Between February and April 2025, another 400 million weekly active users joined the platform. That’s not a typo - we’re now looking at 800 million weekly active users. That’s more than double the population of the entire United States.

So, What on Earth Happened in Just a Few Weeks?

Even for those of us living and breathing this stuff, the speed of change is getting hard to keep up with. While I was hiking canyons and exploring diners, OpenAI was casually dropping some of the most powerful updates in ChatGPT’s history. Here’s a quick round-up:

🔥 The Big Shifts Since February:

  • ChatGPT-4o (Omni) is now the default for all users — replacing the legacy 4 model completely by April 30th.
  • Multimodal brilliance: 4o unifies text, image, and audio processing, allowing for smoother, more human-like interactions across formats.
  • Real-time voice conversations: We’re talking ~232ms response time, with emotional detection and expressive voice replies — this is not your average voice assistant.
  • 25,000-word context window: Hugely useful for extended workflows and coaching-style conversations.
  • Image generation tool went viral and drove a huge wave of engagement — rightfully so, it’s wildly creative.
  • Memory is now smarter: It can access all your previous chats, making your assistant genuinely personal.
  • New mini-models (o3, o4-mini, o4-mini-high) are now supercharged for speed and logic, and can autonomously combine tools like search, vision, code, and image generation.
  • Desktop App Integration: Now working directly with tools like Visual Studio Code to actually edit content, not just suggest changes.

Oh, and ChatGPT-4.1 is quietly out in the wild for API developers — a slight but important evolution on 4o.

ChatGPT Isn’t Just Growing — It’s Dominating

Let’s zoom out for a second. Right now, ChatGPT owns 59.2% of the AI Search Market. Its closest rival? Microsoft Copilot, sitting at just 14.4%. That’s not just a lead — it’s an entirely different playing field.

Add to that the recent unconfirmed-but-likely Shopify integration leaks, and it’s clear OpenAI is coming for every touchpoint of the digital economy - e-commerce, content creation, dev workflows, education, and more.

Want even more stats? Check out DemandSage’s up-to-date stats here - it’s my go-to when tracking just how fast things are moving.

What This Means for You (and Why You Shouldn’t Wait)

If you’re a business owner, educator, freelancer, or just someone trying to stay ahead of the curve - this isn’t just exciting, it’s essential. AI is no longer a niche tool or a future trend. It’s now, and it’s already reshaping how we work, communicate, and build.

And honestly? It can be overwhelming to figure out where to start - especially with the sheer pace of change.

That’s where we come in.

👉 Let’s Talk

At Techosaurus, we specialise in helping people and businesses actually harness this stuff — not just read the headlines.

  • Want to explore how AI can integrate with your team, your workflows, or your content strategy?
  • Need help upskilling your staff and embedding AI safely and effectively?

Come talk to us — or better yet, check out our award winning Generative AI Skills Bootcamp where we train individuals and teams to work with AI, not against it.

Because the future isn’t coming - it’s already here. Let’s evolve with it.