Google’s AI chatbot, Gemini, has crossed a major milestone, surpassing 400 million monthly active users.
Google’s CEO, Sundar Pichai, disclosed this during a press briefing ahead of the company’s recently concluded Google I/O 2025 developer conference.
The achievement places Gemini closer than ever to its chief rival, OpenAI’s ChatGPT, which Google estimates had around 600 million monthly active users as of March 2025. Just two months ago, Gemini trailed with 350 million users, with the recent growth signaling strong momentum in the increasingly competitive AI space.
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“We are starting to see momentum build around Gemini”, said Pichai, who also highlighted that AI-powered overviews in search now reach over 1.5 billion users monthly, indicating that Google is rapidly integrating AI across its ecosystem.
Google Doubles Down on AI With Gemini 2.5 Pro
Building on the success of Gemini 1.5, at the I/O 2025 conference, Google announced Gemini 2.5 Pro Deep Think mode, a significant upgrade that enables the model to consider multiple hypotheses before responding, dramatically improving reasoning and performance.
Google also introduced an improved Gemini 2.5 Flash model lighter, more cost-efficient version of its Pro counterpart. Despite its smaller size, Flash ranks second on the LMArena benchmark, with an ELO score of 1424, just behind Gemini 2.5 Pro’s 1446.
Recall that in December 2023, Google released an updated version of Bard that used a new LLM, named Gemini, claiming that the technology outperformed OpenAI’s GPT-4. Google hoped to surpass OpenAI and other competitors by combining conversational text capabilities present in most LLMs with artificial intelligence–powered image generation, allowing it to create contextual images and be adapted for a wider range of use cases The AI chatbot has so far undergone a significant upgrade, ranking it high among rivals.
In February 2024, Google launched Gemini 1.5 in a limited capacity, positioned as a more powerful and capable model than 1.0 Ultra. This “step change” was achieved through various technical advancements, including a new architecture, a mixture-of-experts approach, and a larger one-million-token context window, which equates to roughly an hour of silent video, 11 hours of audio, 30,000 lines of code, or 700,000 words. The same month, Google debuted Gemma, a family of free and open-source LLMs that serve as a lightweight version of Gemini.
Pichai credits Gemini’s success with Google’s full-stack approach to infrastructure and remarked that the mega-corp’s 7th generation Tensor Processing Unit (TPU), Ironwood, delivers 10x as much performance as the previous generation and is capable of 42.5 exaFLOPS of compute per pod.
The latest Gemini 2.5 Pro is state-of-the-art across a range of benchmarks requiring advanced reasoning. Without test-time techniques that increase cost, like majority voting, 2.5 Pro leads in math and science benchmarks like GPQA and AIME 2025.
It also scores a state-of-the-art 18.8% across models without tool use on Humanity’s Last Exam, a dataset designed by hundreds of subject matter experts to capture the human frontier of knowledge and reasoning.
Looking Ahead
Google’s advancements with Gemini and Search’s AI Mode intensify competition for chatbots like ChatGPT, Perplexity, Grok, and Claude. Gemini’s rapid user growth and integration with Google’s ecosystem challenge rivals to enhance multimodal capabilities, real-time data access, and cost efficiency.
Notably, by building Gemini into Search, Android, Chrome, Workspace, and its developer tools, Google is positioning itself not just as an AI company, but as an AI platform provider, one that blends utility, scale, and personalization