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I’ve already heard a few times that the selection of models is seen as a problem (need to benchmark continually, justify changes…), this is an elegant solution.

I don’t know if choosing different models for the same consumer can be problematic (seen as not consistent), but maybe using this approach will force the post-processing code not to be “coupled” with one particular model.

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This is a great point. With models becoming more intelligent, they're seeming to become less brittle to the subtleties in the prompts, which might mean decoupling will occur naturally anyway. With regards to customers wanting to stick with "one model", we more often find that they want to stick with "one cloud environment". This is not a problem, the router can be deployed inside custom cloud environments easily. Interesting to see how much auto-prompting such as DSPy generalizes across models though, when you really start to see intermediate prompts as latent variables. Not sure how much these learned prompts might behave differently with different LLMs. I guess you might need to jointly learn the prompts and the routing decisions together for it to work really well. One step at a time though!

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