Executive SummaryThe AI battlefield of 2026 has reached unprecedented intensity as Google, OpenAI, and Anthropic have each deployed their most advanced models yet. Facing Gemini 3 Pro's multimodal capabilities, GPT-5.2's extreme logical reasoning, and Claude Opus 4.5's long-form text advantages, how should domestic developers make their selection? This analysis provides a practical,实战-oriented comparison of these leading large language models while revealing an optimal purchasing strategy through n1n API that grants simultaneous access to al...