# History of the Reasoning Revolution: From Wei 2022 Chain-of-Thought to o1 — Seven-Year Birth of 'Thinking Models'

> Source: https://sukruyusufkaya.com/en/learn/llm-muhendisligi/reasoning-tarih-chain-of-thought-o1-dogus
> Updated: 2026-05-13T13:00:30.635Z
> Category: LLM Mühendisliği
> Module: Module 17: Reasoning Models — Test-Time Compute Revolution
**TLDR:** Historical and conceptual anatomy of reasoning models: seven years from Wei et al. 2022 'Chain-of-Thought Prompting' to September 12, 2024 OpenAI o1 launch. Self-consistency (Wang 2022), Tree of Thoughts (Yao 2023), Reflexion (Shinn 2023) — rise and limits of prompting-based reasoning. Why there were no 'reasoning models' until 2024, why o1 was different, emergence of test-time compute as new scaling dimension. What it means for models solving Turkish math problems.