The Paradigm Shift to Test-Time Compute and Agentic Reasoning: The State of AI in Late 2026
A comprehensive analysis of the latest breakthroughs in artificial intelligence: how the industry transitioned from pre-training parameter scaling to test-time compute scaling (System 2 deliberation), reinforcement learning for verifiable reasoning (DeepSeek-R1, OpenAI o3), and production-grade agentic orchestration architectures.