Gemini 2.5 Pro is very solid all around. Claude is better at coding. Last place, for most tasks: ChatGPT-5. However, I have actually been quite impressed with Chinese Open weight models such as Qwen3..

I have been incredibly fortunate to learn both from my amazing coauthors and a fantastic set of HBS alumni. And this work will be foundational for more forthcoming research (by others and myself) on how AI will impact the process of making business strategy going forward.

What is more, we establish causal evidence that business education has a persistent impact on CEO's strategy process -- even decades later. (So yes, business education does actually matter..)

Our basic result is that strategic decision-making styles vary widely across CEOs and that CEOs with more structured practices (proactive, consistent and hypothesis-driven), tend to outperform their (less-structured) peers especially in industries with high degrees of strategic complexity.

This also raises huge issues for replicability of research based on older ChatGPT models..

Urg

Confirmed, geez