Hello! :wave: I have a question about the differen...

# koog-agentic-framework

[Mikolaj]

Hello! 👋 I have a question about the difference between OpenRouterLLMClient and OpenAILLMClient. Since OpenRouter claims to be OpenAI-compatible, I expected to be able to run inference on an OpenRouter model using OpenAILLMClient. However, when I try, I run into an error.

[Vadim Briliantov]

Hi! OpenRouter is generally OpenAI compatible API-wise, but has some slight differences.

And specifically, model IDs are different, for example OpenAIModels.Chat.Gpt4o has id "gpt-4o" while OpenRouterModels.GPT4o has id = "openai/gpt-4o" (obviously, because OpenRouter supports not only OpenAI but also Anthropic and Gerini models, for example — hence, they needed to come up with some distinguishing in their IDs). That is the main reason why you’re getting the error

[Mikolaj]

Got it, thank you!