1. Introduction: The End of the AI Honeymoon Phase
1.1. Crossing the AI Childhood Era
Until 2024, we were essentially "playing" with Artificial Intelligence. We asked them to write poems, tell dad jokes, or summarize emails. But 2025 is the year of "Serious Work." Large Language Models (LLMs) have reached maturity. The simultaneous release of Gemini 3 Ultra by Google and GPT-5 by OpenAI marks the beginning of a new era where AI is no longer an assistant, but a "Senior Partner."
At Tekin Plus, we tested both models for a week under real-world pressure conditions—heavy coding, stock market data analysis, and complex medical diagnosis scenarios. The results were astonishing, and at times, terrifying.
1.2. Defining "Super-Human Intelligence"
We are no longer talking about "Artificial General Intelligence" (AGI) as a distant dream. Both models exhibit traits that surpass the average human in specific domains. The question isn't "Can they do it?", but "Which one does it like a genius?"
2. Anatomy of Google Gemini 3 Ultra
2.1. Advanced Mixture of Experts (MoE)
Google has doubled down on Mixture of Experts (MoE) architecture in Gemini 3, but on a scale never seen before. Instead of one monolithic brain, think of this model as a council of thousands of "Sub-Models." One is a Python expert, another is a Constitutional Lawyer, and another is a Poet. When you ask a question, a "Router" activates only the relevant experts. This means Gemini 3, despite its massive parameter count, is incredibly fast and energy-efficient.
2.2. 10 Million Token Memory (Infinite Context)
Google's absolute ace card is Memory. Gemini 3 boasts a Context Window of up to 10 Million Tokens.
What does this mean practically? It means you can upload the entire video trilogy of "The Lord of the Rings" and ask: "At minute 43 of the second movie, how did Legolas's outfit change?" and it will answer correctly. Or, you can feed it the entire codebase of an operating system and ask it to find a zero-day security vulnerability. GPT-5 is still limited in this regard (rumored to be around 2 million tokens).
2.3. Integration with Android 16
Gemini 3 isn't just a chatbot; it is the kernel of the Android 16 operating system. It has "Contextual Awareness." It knows where you were last night, what photos you took, and what meetings you have today without you uploading anything. This deep integration makes Gemini far superior to GPT-5 for daily lifestyle tasks and mobile interaction.
3. Anatomy of OpenAI GPT-5
3.1. System 2 Thinking
If Gemini is "Memory," GPT-5 is "Thought." Sam Altman introduced a model that, for the first time, thinks before it types. When you ask a complex question, GPT-5 enters a "Reflection Mode." It simulates different scenarios, fact-checks itself, corrects potential logical fallacies, and then generates the final answer. This mimics the "Slow Thinking" process of the human brain described by Daniel Kahneman.
3.2. Autonomous Agents
GPT-5 is designed to be "Agentic." It doesn't just output text; it executes actions. It can browse the web, write and execute code to verify its own math, and interface with other APIs seamlessly. It feels less like a search engine and more like a proactive employee.
3.3. Creativity and Nuance
In creative writing tests, GPT-5 remains the undisputed King. While Gemini 3's text can sometimes smell of "Corporate Reports," GPT-5 can write in complex tones—dark humor, epic prose, melancholic poetry—and create metaphors that will stop you in your tracks. It understands the "Soul" of language better.
4. Round 1: Reasoning & Math (MMLU & MATH)
4.1. Solving Complex Problems
We fed both models a multi-layered quantum physics problem and a complex criminal riddle involving contradictory witness statements.
GPT-5: It broke the problem down into 10 logical steps, verified its assumptions at step 4, and arrived at the correct conclusion. (Score: 10/10)
Gemini 3: It provided the answer much faster, but made a minor logical leap in one of the deduction steps that could lead to errors in edge cases. (Score: 9/10)
Winner: In pure reasoning, GPT-5 wins thanks to "System 2."
5. Round 2: Coding & Software Engineering
5.1. The Battle of Engines
As discussed in our "Google Antigravity" review, Gemini 3 drives Google's coding platforms. However, GPT-5 is the brain behind independent tools like Devin.
The Debugging Test: We provided a Python script with 5 hidden, logic-based bugs (not syntax errors).
Gemini 3: Found the bugs and rewrote the code instantly. It excels at speed and syntax.
GPT-5: Not only found the bugs but explained why these bugs were introduced in the first place and suggested an architectural change to prevent them in the future.
Winner: For "Writing Code," Gemini is faster. For "Software Engineering," GPT-5 is deeper.
6. Round 3: Multimodality (Seeing & Hearing)
6.1. Native Vision
This is Google's home turf. Gemini 3 is trained natively as multimodal. It "sees" video as video, not as a sequence of screenshots.
Video Test: We showed both models a video of a foosball match. Gemini 3 understood the rules of the game and even identified a foul by one of the players. GPT-5 (which still relies on stitching vision modules) was slower to grasp the dynamic movement details.
Absolute Winner: Google Gemini 3 Ultra.
7. Speed & Cost Analysis
7.1. Latency & Pricing
Gemini 3: Thanks to Google's custom TPU v6 chips, the cost of inference has dropped massively. The "Flash" version of Gemini 3 is almost free for developers and incredibly fast.
GPT-5: Due to the heavy "System 2" processing, it is slower and more expensive. The ChatGPT Plus subscription is rumored to increase to $30/month to cover the compute costs.
8. Tekin Plus Verdict: Who is the True King?
Choosing a final winner is difficult because each reigns supreme in its own kingdom.
- If you are a Researcher, Data Analyst, or Lawyer: Google Gemini 3 Ultra is your choice. Its massive memory and speed in analyzing vast datasets are unrivaled.
- If you are a Writer, Philosopher, or System Architect: OpenAI GPT-5 is your choice. Its reasoning power and creativity are still a generation ahead of Google.
Final Tekin Plus Score:
🧠 Logical Intelligence: GPT-5 (9.8/10) > Gemini 3 (9.5/10)
👁 Multimodality & Perception: Gemini 3 (10/10) > GPT-5 (9/10)
💾 Memory & Context: Gemini 3 (10/10) > GPT-5 (8/10)
The war is not over; this is just the beginning of the "Super-Intelligence" era.