Ask HN: What's the best way to build agents in Oct 2025

[th3o6a1d]

I know this a broad question, but I'm a bit overwhelmed by all the available frameworks and rapidly changing ecosystem. Not looking for a detailed approach, just would really appreciate any resources or favorite frameworks to get me pointed in the right direction.

I'm familiar with writing a basic chat loop with tool calls, and the basics of MCP.

Ideally would to be able to use different foundation and specialized models, not be locked into a specific vendor, and be able to work with memory (I think).

Thanks so much!

[ibash]

Pydantic ai is pretty good. There were some growing pains as it moved towards 1.0, but going forward the API should be mostly stable.

It does have slightly more complexity than I’d like, but most of the design decisions are sound and the code is easy to read.