why is gpt-5-nano under `OpenAIModels.Chat` rathe...

# koog-agentic-framework

[S.]

why is gpt-5-nano under OpenAIModels.Chat rather than OpenAIModels.CostOptimized like gtp-4.1-nano?

[Konstantin]

Because it's a chat model. It's getting difficult to classify models in multidimensional space... 🙂

[S.]

I understand that but isn't 4.1 nano a chat model as well? where's the difference?

[Konstantin]

@Vadim Briliantov might know more about historical reasons

[Vadim Briliantov]

Actually, we usually provide some shortcuts , ex: in CostOptimized there’s public val O3Mini: LLModel get() = Reasoning.O3Mini

We can actually do the same for GPT5 nano and small