Google Reportedly Cancels Gemini 3.5 Pro as Gemini 4 Becomes the New Priority

Google might be preparing to skip a chapter in the Gemini story — and jump straight to the next big thing.

After months of waiting for the company's highly anticipated Gemini 3.5 Pro, speculation is heating up that Google could ultimately shelve the delayed flagship model and put its muscle behind Gemini 4 instead.

And if that's really where this thing is headed, Google isn't simply delaying a product. It's potentially looking at the AI roadmap, tearing out a page and saying, "Forget it — let's move on."

Gemini 3.5 Pro Was Supposed to Be Here Already

Google officially announced Gemini 3.5 Pro at Google I/O 2026, saying the model was already being used internally and that the company expected to begin rolling it out the following month.

You can see Google's original announcement in its Google I/O 2026 roundup here.

Problem is ... that June rollout never happened.

July arrived, and Google instead introduced Gemini 3.6 Flash, Gemini 3.5 Flash-Lite and Gemini 3.5 Flash Cyber — but still no 3.5 Pro.

Reports later pointed to performance problems as a reason for the holdup. Reuters reported that the flagship Gemini model had fallen behind schedule after reportedly failing to meet Google's internal performance targets, particularly when it came to coding.

Meanwhile ... Gemini 4 Is Already Cooking

Here's where things get interesting.

While everybody was still asking when Gemini 3.5 Pro would finally show up, Google revealed that it had already started training its next generation of AI models — Gemini 4.

In a later official Google update, the company said Gemini 3.5 Pro was still being tested with partners and would become broadly available when it was ready.

But in the very same announcement, Google dropped the bigger bombshell: its team had begun what it called its most ambitious pre-training run yet for Gemini 4.

Translation? The next-generation Gemini train has already left the station while 3.5 Pro is still sitting on the platform.

Could Google Just Skip 3.5 Pro?

That's now the big question.

With Gemini 3.5 Pro delayed and Gemini 4 already under development, speculation has naturally started swirling that Google could decide an intermediate flagship launch simply isn't worth the trouble anymore.

And in today's completely bonkers AI race, that wouldn't be impossible.

Google isn't competing against AI models from six months ago. It's battling constantly updated systems from OpenAI, Anthropic and other major AI labs, where a model can go from cutting-edge to yesterday's news ridiculously fast.

If Google's internal Gemini 4 work is already showing a substantial jump over 3.5 Pro, the company could theoretically decide its resources are better spent pushing the new generation forward.

But Hold Up — Google Has NOT Officially Canceled It

Here's the important part: Google has not publicly announced that Gemini 3.5 Pro is canceled.

As of Google's latest public statements, the company says the model remains in testing with partners.

So reports or speculation suggesting Google has completely killed the model should not be treated as official confirmation just yet.

What is confirmed is pretty wild on its own: Gemini 3.5 Pro missed its original launch window, Google has released newer Gemini variants around it, and Gemini 4 is already undergoing a massive pre-training effort.

The AI Race Waits for Nobody

Whether Gemini 3.5 Pro eventually makes its grand entrance or quietly disappears into Google's AI graveyard, Gemini 4 is starting to look like the much bigger story.

AI development is moving so fast that companies now face a bizarre problem — a model can practically become outdated before the public ever gets to use it.

And if Google really does decide to skip 3.5 Pro and put everything behind Gemini 4?

That's one hell of a software update: from "coming next month" to "never mind, we're building the next one."