Comprehensive 135-page survey from UIUC, Meta, Amazon, and Google DeepMind establishes agentic reasoning taxonomy. Identifies three capability layers: foundational (planning, tool use), self-evolving (feedback, memory, adaptation), and collective multi-agent reasoning.

Claude Opus 4.5 achieved 80.9% on SWE-bench Verified, becoming the first model to exceed the 80% threshold. This represents a 21x improvement from GPT-4's initial 3.8% score in October 2023, demonstrating rapid progress in AI coding capabilities.

Writer Action Agent achieved 61% on GAIA Level 3 (hardest tier), surpassing Manus AI (57.7%) and OpenAI Deep Research (47.6%). GAIA tests multi-step reasoning, tool use, and web browsing - capabilities critical for general AI assistants.