--- title: "yalm vs uqlm" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/andrewkchan-yalm-vs-cvs-health-uqlm" tools: ["andrewkchan-yalm", "cvs-health-uqlm"] --- # yalm vs uqlm *GraphCanon updated Aug 25, 2026* ## Verdict Pick yalm if yALM offers a no-frills LLM inference engine in C++/CUDA, optimized for tasks requiring minimal external dependencies beyond I/O and no reliance on heavyweight ML libraries; pick uqlm if uqlm offers specialized Python capabilities for quantifying uncertainty to improve confidence in language model outputs and reduce hallucinations. [yalm](https://github.com/andrewkchan/yalm) reports 596 GitHub stars, 64 forks, and 4 open issues, last pushed Sep 13, 2025. [uqlm](https://cvs-health.github.io/uqlm/latest/index.html) has 1.2k stars, 129 forks, and 25 open issues, last pushed Aug 3, 2026. Figures are from public GitHub metadata via [yalm's repository](https://github.com/andrewkchan/yalm) and [uqlm's repository](https://github.com/cvs-health/uqlm). | | [yalm](/tools/andrewkchan-yalm.md) | [uqlm](/tools/cvs-health-uqlm.md) | | --- | --- | --- | | Tagline | LLM inference engine in C++/CUDA without dependency on external libraries except for I/O | A Python package for uncertainty quantification in LLM hallucination detection | | Stars | 596 | 1,188 | | Forks | 64 | 129 | | Open issues | 4 | 25 | | Language | C++ | Python | | Adopt for | YALM offers a no-frills LLM inference engine in C++/CUDA, optimized for tasks requiring minimal external dependencies beyond I/O and no reliance on heavyweight ML libraries. | uqlm offers specialized Python capabilities for quantifying uncertainty to improve confidence in language model outputs and reduce hallucinations. | | Persona | - | - | | Runtime | - | - | | License | - | Apache-2.0 | | Categories | Inference & Serving | Evaluation & Observability | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [yalm](/tools/andrewkchan-yalm.md) | [uqlm](/tools/cvs-health-uqlm.md) | | --- | --- | --- | | Maintenance | Slowing (36%) | Very active (96%) | | Days since push | 345d | 4d | | Open issues (now) | 4 | 25 | | Stars delta | +4 (30d) | Unknown | | Open issues delta | 0 (30d) | Unknown | | Owner type | User | Organization | | Full report | [trust report](/tools/andrewkchan-yalm/trust.md) | [trust report](/tools/cvs-health-uqlm/trust.md) | ## Decision facts: yalm - **Adopt for:** YALM offers a no-frills LLM inference engine in C++/CUDA, optimized for tasks requiring minimal external dependencies beyond I/O and no reliance on heavyweight ML libraries. ## Decision facts: uqlm - **Adopt for:** uqlm offers specialized Python capabilities for quantifying uncertainty to improve confidence in language model outputs and reduce hallucinations. ## Choose when ### Choose yalm if… - yalm is primarily C++; uqlm is Python. - Tags unique to yalm: cpp, cuda, llm-inference, machine-learning. - Also covers Inference & Serving. - When your project's stack is primarily based on C++ and CUDA, allowing seamless integration without additional dependencies ### Choose uqlm if… - uqlm is primarily Python; yalm is C++. - Tags unique to uqlm: ai safety, ai-evaluation, confidence-estimation, hallucination-detection. - Also covers Evaluation & Observability. - When precise estimation of confidence scores is needed to ensure reliability in language model predictions. ## When NOT to use yalm - If extensive functionality or ease of use from other ML libraries is required, as YALM does not support dependencies beyond I/O needs - For developers who prefer tools with broader community support and more comprehensive feature sets, given that YALM specializes in a narrow scope ## When NOT to use uqlm - If working exclusively with non-language-based machine learning models, as uqlm focuses on text outputs from LLMs. - When simple plug-and-play performance metrics suffice; uqlm requires a more intricate setup for uncertainty quantification and confidence estimation. ## Common questions ### What is the difference between yalm and uqlm? yalm: LLM inference engine in C++/CUDA without dependency on external libraries except for I/O. uqlm: A Python package for uncertainty quantification in LLM hallucination detection. See the comparison table for live GitHub stats and shared categories. ### When should I choose yalm over uqlm? Choose yalm over uqlm when yalm is primarily C++; uqlm is Python; Tags unique to yalm: cpp, cuda, llm-inference, machine-learning; Also covers Inference & Serving; When your project's stack is primarily based on C++ and CUDA, allowing seamless integration without additional dependencies. ### When should I choose uqlm over yalm? Choose uqlm over yalm when uqlm is primarily Python; yalm is C++; Tags unique to uqlm: ai safety, ai-evaluation, confidence-estimation, hallucination-detection; Also covers Evaluation & Observability; When precise estimation of confidence scores is needed to ensure reliability in language model predictions. ### When should I avoid yalm? If extensive functionality or ease of use from other ML libraries is required, as YALM does not support dependencies beyond I/O needs For developers who prefer tools with broader community support and more comprehensive feature sets, given that YALM specializes in a narrow scope ### When should I avoid uqlm? If working exclusively with non-language-based machine learning models, as uqlm focuses on text outputs from LLMs. When simple plug-and-play performance metrics suffice; uqlm requires a more intricate setup for uncertainty quantification and confidence estimation. ### Is yalm or uqlm more popular on GitHub? uqlm has more GitHub stars (1,188 vs 596). Stars measure visibility, not whether either tool fits your constraints. ### Are yalm and uqlm open source? Yes - both are open-source projects on GitHub. ### Where can I find alternatives to yalm or uqlm? GraphCanon lists graph-backed alternatives at [yalm alternatives](/tools/andrewkchan-yalm/alternatives) and [uqlm alternatives](/tools/cvs-health-uqlm/alternatives) ([yalm markdown twin](/tools/andrewkchan-yalm/alternatives.md), [uqlm markdown twin](/tools/cvs-health-uqlm/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/andrewkchan-yalm-vs-cvs-health-uqlm.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, yalm or uqlm? yalm: Slowing. uqlm: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for yalm and uqlm? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [yalm trust report](/tools/andrewkchan-yalm/trust); [uqlm trust report](/tools/cvs-health-uqlm/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=andrewkchan-yalm`](/api/graphcanon/graph?tool=andrewkchan-yalm) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_