Gemini 3.5 Flash: frontier intelligence with speed

Google Gemini’s next-generation family offering: Gemini 3.5 is here! 

Gemini 3.5 Flash combines frontier intelligence with real-world action and supports high-speed agentic workflows, coding, and multimodal reasoning while maintaining the low latency expected from the Flash series.

With Gemini 3.5 Pro, slated to be released in the next month, let’s take a look at the flash model and what it brings to the table.

What is Gemini 3.5 Flash?

Positioned as a model built for practical execution rather than just conversation, Gemini 3.5 Flash emphasizes long-horizon task handling, collaborative subagents, richer UI generation, and large-scale workflow automation across both developer and enterprise environments.

Here are the key features of Gemini 3.5 Flash:

• Outperforms Gemini 3.1 Pro on coding and agentic tasks
• 1M token context window with 65k max output tokens
• 4x faster in terms of output tokens/sec
• 4 thinking levels: minimal, low, medium (new default), high
• Thought preservation across multi-turn conversations automatically

How to Access Gemini 3.5 Flash

Gemini 3.5 Flash is currently available across consumer, developer, and enterprise platforms.

• General users can access it through the Gemini app and AI Mode in Google Search.
• Developers can use it through Google Antigravity, the Gemini API in Google AI Studio, and Android Studio.
• Enterprise customers can access it through Gemini Enterprise Agent Platform and Gemini Enterprise.

Since the model isn’t open-source or weights, it can’t be accessed via Hugging Face but can be used using its Gemini API. You can use Gemma 4 if you’re interested in local model execution. 

Hands-On 1: Prototyping

Response:

After copying the code and creating the HTML, this is the result I got: 

There are some images missing and some buttons aren’t functional either. But it created all of this in under 10 seconds!! makes it all the more impressive. You could use this for quick prototyping of ideas.

Hands-On 2: Tricky Problems

Response:

This might seem like a no-brainer to us, but LLMs have for the longest time struggled to answer this question correctly. 

Hands-On 3: Visuals at Speed

Response:

Then this image depicting the decay in image quality followed:

Since I was experiencing issues with image generation in Gemini App, I used AI Mode as a workaround. It did work and was able to respond to my query in under 10 minutes. 

Note: All the tests have been done in the free account of Gemini App. 

Final Verdict

More than anything, the thing that stood out to me across these tests was the speed at which the responses were made. No response in this list took more than 10 seconds (time taken by Gemini 3.5 Flash to start responding). 

The quality of response can be further improved, but that isn’t a issue as a flash model isn’t supposed to be used for quality responses (which requires time).

Conclusion

The Gemini 3.5 Flash not only looks promising on paper but in results too. With versatile capabilities and the speed, Gemini 3.5 Flash model has got so many things right. Also it’ll be interesting to see how the Pro variant of this model family fares with other models of the same capabilities. 

Read more: Google’s TurboQuant: Reduce Model Memory Usage by Half

Vasu Deo Sankrityayan

I specialize in reviewing and refining AI-driven research, technical documentation, and content related to emerging AI technologies. My experience spans AI model training, data analysis, and information retrieval, allowing me to craft content that is both technically accurate and accessible.