Google Gemini 3 Is Here: Everything You Need to Know About the "Deep Think" AI Era

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The AI race just accelerated. On November 18, 2025, Google officially unveiled Gemini 3, its most intelligent and capable model to date. The new Gemini 3 lineup promises to shift the focus from simple chatbots to true "thought partners" capable of long-horizon planning, autonomous coding, and deeper reasoning.

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If you are wondering whether Gemini 3 is just an incremental update or a genuine leap forward, the early benchmarks suggest the latter. Here is a comprehensive breakdown of what Gemini 3 is, how it compares to GPT-5, and how you can use it today.

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What is Google Gemini 3?

Gemini 3 is Google’s latest family of multimodal AI models, designed to integrate natively with text, images, audio, video, and code. Unlike its predecessors, Gemini 3 is built with a heavy emphasis on agentic capabilities—meaning it doesn't just answer questions; it can actively plan, reason, and execute multi-step workflows.

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The launch introduces two primary variants:

1. Gemini 3 Pro: The standard flagship model, available immediately, which balances speed with high-level reasoning.
2. Gemini 3 Deep Think: A specialized "reasoning-heavy" model (coming soon to AI Ultra subscribers) designed to tackle complex math, science, and logic problems that stump standard LLMs.

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Key Features of Gemini 3

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1. "Deep Think" Capabilities

The standout feature of this release is the Deep Think mode. Similar to the "reasoning" models seen from competitors, Gemini 3 Deep Think takes time to process "depth and nuance" before responding.

• Benchmark Domination: Google claims Gemini 3 Deep Think scores 93.8% on GPQA Diamond (a graduate-level science benchmark) and achieves unprecedented results on ARC-AGI-2, a test specifically designed to measure general intelligence rather than memorization.
• Humanity’s Last Exam: It currently outperforms all other frontier models on this notoriously difficult test suite.

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2. Google Antigravity & Agentic Coding

For developers, the biggest news is Google Antigravity, a new agentic development platform released alongside Gemini 3. 

• Autonomous Coding: Gemini 3 isn't just an autocomplete tool; it acts as an autonomous agent that can debug, refactor, and even "vibe code" (a term Google is using to describe intuitive, high-level coding assistance).
• Performance: It tops the WebDev Arena leaderboard (Elo 1487) and solves over 76% of real-world GitHub issues on the SWE-bench Verified test.

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3. Generative UI (GenUI)

Gemini 3 changes how we interact with search results. Instead of just text, the model can spin up Generative UIs on the fly.

• Example: If you ask for a 3-day Rome itinerary, Gemini 3 doesn't just list locations; it builds an interactive visual layout with maps, booking widgets, and comparison tables generated in real-time.

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4. True Multimodality

While previous models could "see," Gemini 3 pushes this further with deeper video and screen understanding. It can analyze hours of video footage or complex screen states to help with tasks ranging from video editing to real-time software troubleshooting.

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Gemini 3 vs. The Competition (GPT-5 & Claude)

The release of Gemini 3 comes just months after the launch of GPT-5 (August 2025) and updates to the Claude family. How does it stack up?

Here's a feature comparison:

• Reasoning:
  
  • Gemini 3: Leading (Deep Think mode)
  • GPT-5: High
  • Claude Sonnet 4.5: Very High
• Context Window:
  
  • Gemini 3: Huge (1M tokens)
  • GPT-5: High
  • Claude Sonnet 4.5: High
• Coding:
  
  • Gemini 3: Google Antigravity Agent
  • GPT-5: Canvas / Interpreter
  • Claude Sonnet 4.5: Artifacts
• Multimodality:
  
  • Gemini 3: Native (Video/Audio/Text)
  • GPT-5: Native‍
  • Claude Sonnet 4.5: Native (Strong Vision)

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Early reports from LMArena show Gemini 3 Pro scoring 1501, surpassing the previous leaders. While GPT-5 remains a powerhouse for creative writing and conversation, Gemini 3 appears to have taken the lead in technical reasoning, coding agents, and multimodal integration.

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How to Access Gemini 3

You can try the new model right now, though availability depends on your subscription status:

• Gemini App (Free/Plus): The standard Gemini 3 Pro model is rolling out globally to free users and Workspace customers starting immediately.
• Gemini Advanced (AI Ultra Subscribers): Subscribers will get exclusive access to Gemini 3 Deep Think in the coming weeks.
• Developers: The model is available via Google AI Studio and Vertex AI for enterprise applications.
• Google Search: "AI Mode" in Search is now powered by Gemini 3, enabling those rich, generative UI visual results.

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New Era of Intelligence

Google has described Gemini 3 as a "new era of intelligence," moving from chatbots to agents. With the introduction of Antigravity, Google is clearly betting that the future of AI lies in models that can do things, not just say things.

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Ready to deploy Gemini 3 agents in your organization? Contact Cloudasta today.

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