In 2026, the landscape of AI logic has shifted from pattern matching to systematic reasoning. GPT-5.2 and Gemini 3 lead this evolution by moving beyond “next-token prediction” toward deliberate, multi-step “thinking” processes.

GPT-5.2 utilizes a tiered system—Instant, Thinking, and Pro—that prioritizes professional reliability. Its “thinking” mode excels in structured logic, achieving a perfect 100% on the AIME 2025 math benchmark by verifying its internal work before responding.

Conversely, Gemini 3 redefines logic through multi-modal depth. Its “Deep Think” mode tackles abstract scientific and engineering problems by reasoning across text, video, and code simultaneously. With a massive context window, it maintains logical consistency across 1 million tokens, transforming AI into a high-reasoning partner for complex, real-world research.

Feature	GPT-5.2 (Thinking/Pro)	Gemini 3 (Deep Think)
Logic Strength	Structured, multi-step professional work	Abstract, scientific, and research reasoning
Math Performance	SOTA (100% on AIME 2025)	Gold-medal level (IMO/Physics Olympiads)
Abstract Reasoning	Leading on ARC-AGI-2 (52.9%)	Strong “System 2” reflective thinking
Context Handling	400K tokens with high reliability	Up to 1M tokens for long-range logic