Google Quietly Upgrades to Gemini 3.6 Flash After 3.5 Fell Short on Coding
Google has released three new AI models, including a surprise version bump from 3.5 to 3.6 Flash. Gemini 3.5 Pro, promised for June, still hasn't arrived.
Key points
- Google released three new AI models in mid-2025, including an updated Gemini 3.6 Flash and its first AI model built specifically for cybersecurity.
- Gemini 3.5 Flash, the centrepiece of Google I/O in May 2025, has already been deprecated, meaning it's switched off and unavailable.
- Gemini 3.5 Pro, promised for a June 2026 launch, remains in testing with no release date.
- Google says 3.6 Flash is better at coding and at multimodal tasks, the ability to handle text, images and other formats together, based on user feedback.
Google doesn't always wait long before replacing its own products. Gemini 3.5 Flash, the star of the company's I/O developer conference just weeks earlier, is already gone. In its place: Gemini 3.6 Flash, a large language model, meaning the same class of AI that powers ChatGPT.
The version jump is small on paper. Google says 3.6 Flash is marginally more capable and handles multimodal tasks more reliably. The company frames the changes as a direct response to complaints from developers who found that 3.5 Flash fell short on code generation, perhaps a side-effect of Google's focus on keeping costs low as businesses push back on high per-query fees.
Coding performance is one of the clearest ways companies measure whether an AI model is worth paying for. Stumble there and customers notice fast.
Also in the batch: Google's first Gemini model aimed at cybersecurity, the practice of protecting computer systems and data from attacks. Our earlier story found that this model located 55 bugs in Chrome's engine that rivals missed, at a fraction of the cost of competing products. That result signals Google is pushing into a market where rivals like Microsoft already have dedicated security AI.
Conspicuously absent is Gemini 3.5 Pro, which Google had pencilled in for June. As first reported by Ars Technica AI, it's still in testing with no firm date.
Why does a version number change matter to ordinary users?
If you use Google's AI through products like Google Workspace or the Gemini app, you likely won't feel a jarring switch. The upgrade happens in the background, and you might notice slightly better results on documents and drafts.
Developers who built apps on Gemini 3.5 Flash are in a different position. Deprecated means the old version is gone: any application still pointing at 3.5 Flash needs updating now. We reported on 18 July that Google also recently changed how it counts AI usage, and the new rules can drain credits faster than users expect.
The bigger story is what Google hasn't shipped. Gemini 3.5 Pro was supposed to be the most capable model in this line. Its continued absence, alongside the rapid retirement of 3.5 Flash, suggests Google is still trading raw performance against the economics of running powerful AI at scale. No new launch window has been announced.
