Language Models as a Service: Overview of a New Paradigm and its Challenges
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Abstract (arXiv)
Some of the most powerful language models currently are proprietary systems, accessible only via (typically restrictive) web or software programming interfaces. This is the Language-Models-as-a-Service (LMaaS) paradigm. In contrast with scenarios where full model access is available, as in the case of open-source models, such closed-off language models present specific challenges for evaluating, benchmarking, and testing them. This paper has two goals: on the one hand, we delineate how the aforementioned challenges act as impediments to the accessibility, replicability, reliability, and trustworthiness of LMaaS. We systematically examine the issues that arise from a lack of information about language models for each of these four aspects. We conduct a detailed analysis of existing solutions and put forth a number of considered recommendations, and highlight the directions for future advancements. On the other hand, it serves as a comprehensive resource for existing knowledge on current, major LMaaS, offering a synthesized overview of the licences and capabilities their interfaces offer.
Key facts. Cited by 10 papers in the map (data through 7 Oct 2026). Builds on 98 of its 141 references that are in the map. First posted on arXiv 28 Sep 2023.
Builds on
98 of 141 references.
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Citing papers per year: 2024: 3; 2025: 5; 2026: 2.
10 papers.
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- 2025Auditing Pay-Per-Token in Large Language Models5 Oct 2025
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