A generalist Router for Inspect: Reasoning router demonstration

Ishan Garg, Aman Neelappa, Gerard Boxo, Alan McBeth

With hundreds of AI models available today, choosing the right model for each query is expensive and inefficient. We develop a system that learns compact "fingerprints" of different models and automatically routes questions to the most cost-effective option. Our approach achieves 96% of premium reasoning model accuracy while cutting costs in half, making advanced AI capabilities accessible without breaking the bank. The key innovation: instead of using generic question embeddings, we let each model "see" questions through its own lens, dramatically improving routing decisions.

Reviewer's Comments

Reviewer's Comments

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Philip Quirke

Thank you for your submission. I enjoyed your results - mainly a comparison of cost / benefit of two models by new criteria.

There is no link to the code. Also the Results section starts a bit abruptly and could use more context / introduction / explanation.

Curt Tigges

This project demonstrates an interesting interesting technical approach to model routing, and seems quite valuable from an orchestration perspective. The technical methods are clearly spelled out and seem reproducible. Though the authors didn't explicitly address safety, I could see this potentially being used to route queries to safer models for that query, and this could plausibly have impact in MI.

Narmeen

Strength:

Nice problem framing saying that we don’t need extra reasoning tokens for all tasks and we can leverage a router to find the best model for each type of query; e.g: one that requires reasoning and one that does not

Shows trade-off of cost versus accuracy for both models

Weaknesses:

Although we want to show that some queries don’t require reasoning, the datasets are both reasoning focussed.

Results are a bit early stage: Ideally I would have liked to see a graph that shows the router’s performance versus every model’s performance (right now we only have performance/cost for each model per dataset)

Could benefit from a bit of more novelty other than an application of routing to reasoning versus non-reasoning models.

Expert Orchestration: 3

MI : 1

Technical Implementation and reproducibility: 1 (code is not provided)

Nick

Nice!

Cite this work

@misc {

title={

@misc {

},

author={

Ishan Garg, Aman Neelappa, Gerard Boxo, Alan McBeth

},

date={

6/2/25

},

organization={Apart Research},

note={Research submission to the research sprint hosted by Apart.},

howpublished={https://apartresearch.com}

}

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This work was done during one weekend by research workshop participants and does not represent the work of Apart Research.
This work was done during one weekend by research workshop participants and does not represent the work of Apart Research.