I feel we were hearing very similar claims 40 years ago, about how the next version of "Fourth Generation Languages" were going to enable business people and managers to write their own software without needing pesky programmers to do it for them. They'll "just" need to learn how to specify the problem sufficiently well.
(Where "just" is used in it's "I don't understand the problem well enough to know how complicated or difficult what I'm about to say next is" sense. "Just stop buying cigarettes, smoker!", "Just eat less and exercise more, fat person!", "Just get a better paying job, poor person!", "Just cheer up, depressed person!")
If not working at one of the big players or running your own, it appears that even the APIs these days are wrapped in layers of tooling and abstracting raw model access more than ever.
No, the APIs for these models haven't really changed all that much since 2023. The de facto standard for the field is still the chat completions API that was released in early 2023. It is almost entirely model improvements, not tooling improvements that are driving things forward. Tooling improvements are basically entirely dependent on model improvements (if you were to stick GPT-4, Sonnet 3.5, or any other pre-2025 model in today's tooling, things would suck horribly).
I disagree. This almost entirely model capability increases. I've stated this elsewhere: https://news.ycombinator.com/item?id=46362342
Improved tooling/agent scaffolds, whatever, are symptoms of improved model capabilities, not the cause of better capabilities. You put a 2023-era model such as GPT-4 or even e.g. a 2024-era model such as Sonnet 3.5 in today's tooling and they would crash and burn.
The scaffolding and tooling for these models have been tried ever since GPT-3 came out in 2020 in different forms and prototypes. The only reason they're taking off in 2025 is that models are finally capable enough to use them.
My personal opinion is that there was a threshold earlier this year where the models got basically competent enough to be used for serious programming work. But all the major on the ground improvements since then has gone from the agents, and not all agents are equal, while all sota models are effectively.
Yes definitely. But this is to be expected. Heck take the same person and put them in two different environments and they'll have very different performance!
> But cross (same tier) model in the same agent is much less stark.
Unclear what you mean by this. I do agree that the big three companies (OpenAI, Anthropic, Google DeepMind) are all more or less neck and neck in SOTA models, but every new generation has been a leap. They just keep leaping over each other.
If you compare e.g. Opus 4.1 and Opus 4.5 in the same agent harness, Opus 4.5 is way better. If you compare Gemini 3 Pro and Gemini 2.5 Pro in the same agent harness, Gemini 3 is way better. I don't do much coding or benchmarking with OpenAI's family of models, but anecdotally have heard the same thing going from GPT-5 to GPT-5.2.
The on the ground improvements have been coming primarily from model improvements, not harness improvements (the latter is unlocked by the former). Again, it's not that there were breakthroughs in agent frameworks that happened; all the ideas we're seeing now have all been tried before. Models simply weren't capable enough to actually use them. It's just that more and more (pre-tried!) frameworks are starting to make sense now. Indeed, there are certain frameworks and workflows that simply did not make sense with Q2-Q3 2025 models that now make sense with Q4 2025 models.
