--- title: "langevals vs hallucination-index" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/langwatch-langevals-vs-rungalileo-hallucination-index" tools: ["langwatch-langevals", "rungalileo-hallucination-index"] --- # langevals vs hallucination-index *GraphCanon updated Sep 20, 2026* ## Verdict Pick langevals if langEvals is an amalgamation platform for various language model evaluators under one umbrella. This tool offers a standardized interface to assess and protect large language models with ease; pick hallucination-index if hallucination-Index helps users identify LLMs with the lowest propensity for factual errors across varying context lengths and source types. [langevals](https://langwatch.ai/) reports 72 GitHub stars, 10 forks, and 0 open issues, last pushed Feb 15, 2026. [hallucination-index](https://www.rungalileo.io/hallucinationindex) has 115 stars, 8 forks, and 1 open issues, last pushed Jul 28, 2025. Figures are from public GitHub metadata via [langevals's repository](https://github.com/langwatch/langevals) and [hallucination-index's repository](https://github.com/rungalileo/hallucination-index). | | [langevals](/tools/langwatch-langevals.md) | [hallucination-index](/tools/rungalileo-hallucination-index.md) | | --- | --- | --- | | Tagline | Provides a platform for evaluating and benchmarking LLM models using various evaluators | Initiative to evaluate and rank popular LLMs based on hallucination propensity | | Stars | 72 | 115 | | Forks | 10 | 8 | | Open issues | 0 | 1 | | Language | - | - | | Adopt for | LangEvals is an amalgamation platform for various language model evaluators under one umbrella. This tool offers a standardized interface to assess and protect large language models with ease. | Hallucination-Index helps users identify LLMs with the lowest propensity for factual errors across varying context lengths and source types. | | Persona | - | - | | Runtime | - | - | | License | - | - | | Categories | Evaluation & Observability | Evaluation & Observability | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [langevals](/tools/langwatch-langevals.md) | [hallucination-index](/tools/rungalileo-hallucination-index.md) | | --- | --- | --- | | Maintenance | Archived (8%) | Dormant (18%) | | Days since push | 209d | 418d | | Archived on GitHub | Yes | No | | Open issues (now) | 0 | 1 | | Stars delta | 0 (30d) | -1 (30d) | | Open issues delta | -18 (30d) | 0 (30d) | | Full report | [trust report](/tools/langwatch-langevals/trust.md) | [trust report](/tools/rungalileo-hallucination-index/trust.md) | ## Decision facts: langevals - **Pricing:** unknown - **Adopt for:** LangEvals is an amalgamation platform for various language model evaluators under one umbrella. This tool offers a standardized interface to assess and protect large language models with ease. ## Decision facts: hallucination-index - **Adopt for:** Hallucination-Index helps users identify LLMs with the lowest propensity for factual errors across varying context lengths and source types. ## Choose when ### Choose langevals if… - Tags unique to langevals: evaluation, guardrails, llm. - When you need a singular point of access to multiple LLM evaluation tools - More recently updated (last pushed Feb 15, 2026). ### Choose hallucination-index if… - Tags unique to hallucination-index: hallucinations, large-language-models, llm-evaluation, rag. - Use when you need to ensure accuracy in short-context tasks, as it tests models like Chain-of-Note prompting techniques specifically for such scenarios. - More GitHub stars (115 vs 72) - visibility, not fit. ## When NOT to use langevals - If you prefer not having a dependency on LangEvals after it has been moved into the LangWatch monorepo, opting for directly managing individual evaluators could be a better option - When needing to customize evaluation processes extensively beyond what the provided standard interface allows ## When NOT to use hallucination-index - Avoid using Hallucination-Index when your application requires real-time evaluation of hallucinations, as it focuses on predefined tests rather than live model performance. - Do not rely solely on this index if your primary concern is the latest updates to LLM models; its data might not reflect recent improvements in models or the introduction of new ones. ## Common questions ### What is the difference between langevals and hallucination-index? langevals: Provides a platform for evaluating and benchmarking LLM models using various evaluators. hallucination-index: Initiative to evaluate and rank popular LLMs based on hallucination propensity. See the comparison table for live GitHub stats and shared categories. ### When should I choose langevals over hallucination-index? Choose langevals over hallucination-index when Tags unique to langevals: evaluation, guardrails, llm; When you need a singular point of access to multiple LLM evaluation tools; More recently updated (last pushed Feb 15, 2026). ### When should I choose hallucination-index over langevals? Choose hallucination-index over langevals when Tags unique to hallucination-index: hallucinations, large-language-models, llm-evaluation, rag; Use when you need to ensure accuracy in short-context tasks, as it tests models like Chain-of-Note prompting techniques specifically for such scenarios; More GitHub stars (115 vs 72) - visibility, not fit. ### When should I avoid langevals? If you prefer not having a dependency on LangEvals after it has been moved into the LangWatch monorepo, opting for directly managing individual evaluators could be a better option When needing to customize evaluation processes extensively beyond what the provided standard interface allows ### When should I avoid hallucination-index? Avoid using Hallucination-Index when your application requires real-time evaluation of hallucinations, as it focuses on predefined tests rather than live model performance. Do not rely solely on this index if your primary concern is the latest updates to LLM models; its data might not reflect recent improvements in models or the introduction of new ones. ### Is langevals or hallucination-index more popular on GitHub? hallucination-index has more GitHub stars (115 vs 72). Stars measure visibility, not whether either tool fits your constraints. ### Are langevals and hallucination-index open source? Yes - both are open-source projects on GitHub. ### Where can I find alternatives to langevals or hallucination-index? GraphCanon lists graph-backed alternatives at [langevals alternatives](/tools/langwatch-langevals/alternatives) and [hallucination-index alternatives](/tools/rungalileo-hallucination-index/alternatives) ([langevals markdown twin](/tools/langwatch-langevals/alternatives.md), [hallucination-index markdown twin](/tools/rungalileo-hallucination-index/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/langwatch-langevals-vs-rungalileo-hallucination-index.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, langevals or hallucination-index? langevals: Archived. hallucination-index: Dormant. 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 langevals and hallucination-index? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [langevals trust report](/tools/langwatch-langevals/trust); [hallucination-index trust report](/tools/rungalileo-hallucination-index/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=langwatch-langevals`](/api/graphcanon/graph?tool=langwatch-langevals) - 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/_