# New Preprint Proposes Auditing Whether a Model API Actually Serves the Model It Advertises

AgentProv identifies a served backbone through its tool-use behavior rather than its text output, on the argument that providers may quantize or substitute models to cut serving costs.

- Published: 2026-09-02T06:20:39.906Z
- Canonical: https://polylog.news/ai/2026-09-02/new-preprint-proposes-auditing-whether-a-model-api-actually
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [arXiv cs.CR](https://arxiv.org/abs/2609.00052), [arXiv cs.LG](https://arxiv.org/abs/2609.00049)

A preprint posted to arXiv proposes AgentProv, a method for auditing commercial large language model (LLM) application programming interfaces by probing tool-use policy. The authors start from a commercial fact: an API advertises a specific…

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