evaluating-llms-harness

Benchmark language models on MMLU, GSM8K, HumanEval, and more via a unified harness.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/wwwillott/jobnimbus --skill evaluating-llms-harness-wwwillott
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: evaluating-llms-harness
Source: https://github.com/wwwillott/jobnimbus/tree/main/skills/mlops/evaluation/lm-evaluation-harness
Command: npx skills add https://github.com/wwwillott/jobnimbus --skill evaluating-llms-harness-wwwillott

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Benchmarking language models across diverse benchmarks is fragmented and inconsistent. This Skill provides a unified evaluation harness to run standard tasks (MMLU, GSM8K, HumanEval, TruthfulQA, ARC, etc.) and collect comparable metrics.

Core Features & Use Cases

  • Unified task suite: supports dozens of benchmarks across multiple domains and providers.
  • Reproducible workflows: config-driven prompts, few-shot setups, and metrics definitions to ensure apples-to-apples comparisons.
  • Outputs structured results for analysis, model comparison, and reporting.

Quick Start

Run lm_eval on a chosen model with a standard task set to generate a reproducible results file.

Frequently Asked Questions about evaluating-llms-harness

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I benchmark LLMs against standard tasks like MMLU and GSM8K?▼

To benchmark LLMs against MMLU and GSM8K, use a unified evaluation harness that configures prompts, few-shot settings, and metrics to run reproducible comparisons. It orchestrates task loading and outputs structured JSON or CSV results for downstream analytics.

Can I evaluate local models and OpenAI-compatible endpoints in the same benchmark run?▼

Yes, you can evaluate local models and OpenAI-compatible endpoints together. The evaluation harness supports API-based evaluations across HuggingFace, local, and OpenAI-compatible endpoints, enabling apples-to-apples comparisons using config-driven workflows.

What is the best way to ensure reproducible LLM evaluation results across different models?▼

The best way to ensure reproducible LLM evaluation results is using a config-driven harness that standardizes prompts, few-shot setups, and metrics definitions. This unified approach guarantees consistent, comparable benchmarking across diverse models and standard tasks.

Does this LLM evaluation harness support coding benchmarks like HumanEval and MBPP?▼

Yes, the LLM evaluation harness supports coding benchmarks including HumanEval and MBPP. It also covers diverse domains like TruthfulQA and ARC, allowing you to evaluate code generation and reasoning capabilities within the same reproducible workflow.

How do I configure few-shot settings for LLM benchmarking tasks?▼

You configure few-shot settings for LLM benchmarking tasks through the harness's config-driven definitions. By specifying prompts and few-shot setups in the configuration, you ensure consistent task loading and reproducible metrics across all evaluated language models.

What output formats are generated when benchmarking language models with a unified harness?▼

Benchmarking language models with a unified harness generates structured JSON and CSV results. These output files contain comparable metrics from standard tasks, enabling seamless downstream analytics, model comparison, and reporting.