Google announced its latest and greatest AI model, Gemini 3.5 Flash today at Google I/O. Google’s head of Search, Liz Reid, said Gemini 3.5 Flash is Google’s “newest Flash model delivering sustained frontier performance for agents and coding.” She added that is now being used to power AI Mode globally.

Gemini 3.5 Flash. Not only is Gemini 3.5 Flash powering AI Mode in Google Search, but it is also powering the Gemini app, for all users, not just paid users.

For developers, 3.5 Flash is now live in Google Antigravity, Gemini API for Google AI Studio and Android Studio and for enterprise users for Enterprise Agent Platform and Gemini Enterprise.

Koray Kavukcuoglu, CTO of Google DeepMind and Chief AI Architect, said:

  • “Gemini 3.5 Flash delivers intelligence that rivals large flagship models on multiple dimensions, at the speeds you have come to expect from the Flash series.”
  • “It’s our strongest agentic and coding model yet, outperforming Gemini 3.1 Pro on challenging coding and agentic benchmarks like Terminal-Bench 2.1 (76.2%), GDPval-AA (1656 Elo) and MCP Atlas (83.6%), and leading in multimodal understanding (84.2% on CharXiv Reasoning).”
  • “When looking at output tokens per second, it is 4 times faster than other frontier models. Landing in the top-right quadrant of the Artificial Analysis index, 3.5 Flash delivers frontier-level intelligence at exceptional speed — proving you no longer have to trade quality for latency.”

Why we care. Gemini 3.5 is already powering Google Search’s AI Mode and is likely soon to power AI Overviews. It is a step up from the previous AI model and will continue to get smarter and more useful.

It is important for you to see how the AI Mode responses differ from the previous model for the queries and prompts that matter to your site.

Search is changing rapidly and you need to stay on top of these changes.

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Barry Schwartz

Barry Schwartz is a technologist and a Contributing Editor to Search Engine Land and a member of the programming team for SMX events. He owns RustyBrick, a NY based web consulting firm. He also runs Search Engine Roundtable, a popular search blog on very advanced SEM topics.

In 2019, Barry was awarded the Outstanding Community Services Award from Search Engine Land, in 2018 he was awarded the US Search Awards the “US Search Personality Of The Year,” you can learn more over here and in 2023 he was listed as a top 50 most influential PPCer by Marketing O’Clock.

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