Google uses Gemini 3.5 Pro internally

Google used its May 19 I/O keynote to draw a line between what it is shipping now and what it is still holding back. The company said Gemini 3.5 Pro, its heavier-weight model, is already being used internally, but will not be broadly available until next month. At the same event, Google rolled out Gemini 3.5 Flash, introduced a new assistant called Gemini Spark and announced Gemini Omni for video work. Google also said its new Gemini-powered smart glasses are due this fall. ### Why did Google talk about Gemini 3.5 Pro without releasing it? CNBC reported on May 19 that Google said Gemini 3.5 Pro is being used internally but is not ready for wider distribution until next month. That left the company in the unusual position of previewing a flagship model while making a lighter-weight sibling, Gemini 3.5 Flash, the product people could actually use immediately. (cnbc.com) Business Insider reported that CEO Sundar Pichai told the I/O audience to wait until next month for Gemini 3.5 Pro. The report said the delay drew groans from attendees, underscoring that Google chose to show the model’s existence before opening access. ### What did Google release right away instead? Google said in its I/O roundup that it is releasing two new models, Gemini Omni and Gemini 3.5. (cnbc.com) Separate coverage from Ars Technica and CNBC said Gemini 3.5 Flash began rolling out immediately across Google products and developer surfaces. Ars Technica reported that Google positioned Flash as an agent-focused model and said the company claimed users no longer had to trade quality for latency. (businessinsider.com) CNBC said Google described 3.5 Pro as the heavier-weight version, making Flash the model carrying the public launch while Pro remains behind the curtain for now. (blog.google) ### Where do Gemini Spark and Gemini Omni fit into this? CNBC said Google unveiled Gemini Spark as an AI agent and introduced Gemini Omni alongside the model updates at I/O. CNET and other event recaps described Spark as a more personalized assistant and Omni as a tool aimed at video editing and creation. Google’s own I/O collection page grouped those announcements together, showing that the company used the keynote to expand Gemini beyond a single chatbot or model family. (arstechnica.com) The lineup now spans core models, an assistant product and media-generation tools announced on the same day. ### What did Google say about the smart glasses? (cnbc.com) Google said in an official May 19 blog post that “intelligent eyewear with Gemini is coming this fall.” The company said the glasses will let users get directions, send texts and take photos without pulling out a phone, and named Gentle Monster and Warby Parker as frame partners. (blog.google) WIRED’s I/O recap also said the smart glasses are expected this fall. That timing puts the eyewear on a later track than the software announcements Google made during the keynote. ### What is the next date to watch? Next month is the clearest milestone Google has given for Gemini 3.5 Pro. Google did not provide a specific day in the sources reviewed, but CNBC and Business Insider both said wider availability is planned for next month, while the smart-glasses launch remains scheduled for fall 2026. (blog.google) (cnbc.com) (wired.com)