Google Gemini Deep Research vs OpenAI GPT 5.2: Who Will Rise Faster?

Google and OpenAI escalated their rivalry at the forefront of artificial intelligence on the same day, with Google unveiling its most advanced AI research agent yet just as OpenAI released GPT 5.2, codenamed Garlic. 

Google’s announcement centered on a major upgrade to Gemini Deep Research, which it described as a reimagined agent capable of long form reasoning, complex analysis, and enterprise grade investigation rather than simply generating research reports. The closely timed releases immediately drew attention across the AI industry, highlighting how competitive and fast moving the race for advanced agentic AI has become (TechCrunch).

The upgraded Gemini Deep Research runs on Gemini 3 Pro, which Google calls its most advanced and most factual model to date. According to Google, this model is specifically designed to minimize hallucinations, a well known issue where large language models generate incorrect or fabricated information. Hallucinations become especially risky in agentic systems that operate over long periods of time and make many autonomous decisions. In these scenarios, a single incorrect step can undermine an entire workflow, making reliability essential for serious research and enterprise use (Yahoo).

A key change in this release is how Gemini Deep Research can now be used by developers. Through Google’s new Interactions API, developers are able to embed deep research and reasoning capabilities directly into their own applications. This transforms the agent from a standalone research tool into a flexible reasoning layer that can be integrated into enterprise software. Google says customers already use the system for tasks such as due diligence and drug toxicity safety research, both of which require synthesizing large volumes of information within a broad contextual window (moneycontrol).

Google also plans to integrate Gemini Deep Research into several of its own products, including Google Search, Google Finance, the Gemini app, and NotebookLM. This signals a broader shift in how information may be accessed in the future. Rather than users manually searching, reading, and comparing sources, Google envisions AI agents doing much of that work automatically. The company frames this as preparation for a future where humans no longer search the web directly, but instead rely on agents to gather, analyze, and summarize information on their behalf (TechCrunch).

To support its claims of progress, Google introduced a new benchmark called DeepSearchQA, designed to test how well agents handle complex, multi step information seeking tasks. Google has open sourced this benchmark and also evaluated Gemini Deep Research on external tests, including Humanity’s Last Exam and BrowserComp. The agent performed best on DeepSearchQA and Humanity’s Last Exam, while OpenAI’s ChatGPT 5 Pro slightly outperformed Google on BrowserComp, a benchmark focused on browser based agentic tasks (Yahoo).

Those benchmark results were almost immediately challenged by OpenAI’s release of GPT 5.2 later the same day. OpenAI claims that its new model outperforms competitors, including Google, across a range of common benchmarks as well as its own internal evaluations. While full comparisons were still emerging, the near simultaneous announcements underscored how quickly leadership claims can become outdated. Together, the launches reflect an industry wide push toward more autonomous, reliable AI agents, with factual accuracy, developer control, and deep integration into real world tools becoming the defining priorities of the next phase of AI development (Yahoo).

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Works Cited

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Perez, Sarah. “Google Launched Its Deepest AI Research Agent Yet — on the Same Day OpenAI Dropped GPT 5.2.” TechCrunch, 11 Dec. 2025, www.techcrunch.com/2025/12/11/google-launched-its-deepest-ai-research-agent-yet-on-the-same-day-openai-dropped-gpt-5-2/.

“Google Launched Its Deepest AI Research Agent Yet — on the Same Day OpenAI Dropped GPT 5.2.” Yahoo Tech, 11 Dec. 2025, tech.yahoo.com/ai/gemini/articles/google-launched-deepest-ai-research-001856688.html.

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Upstox News Desk. “OpenAI Launches Low Cost ChatGPT Go Plan in India at ₹399 Month: What’s Included?” Upstox, 19 Aug. 2025, https://upstox.com/news/business-news/latest-updates/open-ai-launches-low-cost-chat-gpt-go-plan-in-india-at-399-month-what-s-included/article-179880/.