> Is this true? If yes it makes a lot of sense. Time and time again, when I try some newly released open weights model I am disappointed. Even some older Claude models are beating them on quality of answers, even though they score less on intelligence in benchmarks.

Interesting. My experience is that Opus 5.5 is smarter than a model like Qwen3.8 Flash Next. But given the choice, I'd actually rather work with a model like Qwen3.8 Flash Next.

Even on medium reasoning, modern Qwen and DeepSeek models are ridiculously diligent. If I ask them a question about which library is best for a given task, they'll download 4 different candidates, read the source, and write test programs. Meanwhile Opus will look at a couple of web pages and give me glib bullshit answer. Opus is often like a brilliant coworker who can't be bothered to do their job. The modern Qwen and DeepSeek models are like someone who is merely smart, but who has an alarmingly good work ethic.

And I'm not just writing simple React CRUD GUIs. I'm doing stuff like modernizing ancient software forks, working on high throughput distributed systems, or finding bugs in other people's parser generators. And even the 120-240B open weight models are normally entirely adequate for these tasks.

One of the benchmarks where open models tend to perform badly is Terminal-Bench 4.0. I looked at some of the sample tasks on that benchmark, and some of they are really hard and specialized. Look, all I actually need out of a model is things like "tell me where this distributed algorithm might break", "get this ancient C code to build on modern Debian with modern dependencies", or "write a plan to migrate this database from MySQL to PostgreSQL and to test that the app still works." The modern open models can do all that, no problem.