TL;DR: Nex-N2-Pro by Nex AGI is a free, open-source MoE model (397B params, 17B active) built on Qwen3.5. It scores 75.3 on Terminal-Bench 2.1 — top-3 globally, open or closed — and introduces "Adaptive Thinking" that dynamically scales its reasoning depth per task. You can run it right now on OpenRouter for free.
The Problem With Most Reasoning Models Today
Every modern reasoning model has the same flaw: they think at the same depth regardless of what you ask.
Ask one to add two numbers? Full chain-of-thought. 2,000 tokens of internal monologue. For 1 + 1.
Ask it to architect a distributed system? Same 2,000 tokens. Not enough.
