I fine-tuned Qwen2.5 with GRPO to actually think before it answers โ not just pattern-match.
Most LLMs mimic reasoning. This one builds a real cognitive path:
๐ Plan โ understand the task ๐ Monitor โ reason step by step โ Evaluate โ verify before answering
Every response follows a strict structured protocol: <think> <planning> ... <monitoring> ... <evaluation> ... </think> Then a clean, reasoning-free <output>.
The model self-checks its own structure. If a section is missing or malformed โ the response is invalid.
This isn't chain-of-thought slapped on top. The reasoning protocol is baked in via RL.