simple-evals

Open Source

LLM Evaluation Updated Feb 15, 2026

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Compared with 9 other LLM Evaluation agents Open source Self-hostable Updated Feb 2026

💰 Open Source 🔄 Updated Feb 2026 🖥️ Self-hostable

💰 Pricing

Open Source

Pricing not publicly listed.

🎯 Use Cases

Comparing performance of different LLM versions Validating model outputs against predefined criteria Automating repetitive evaluation tasks Testing model robustness across diverse prompts Sharing reproducible evaluation setups across teams

⚖️ Pros & Cons

✅ Pros

Modular and customizable for varied evaluation needs
Backed by OpenAI, ensuring reliability and active maintenance
Self-hostable for privacy-sensitive or offline use

❌ Cons

Requires technical expertise to set up and adapt
Limited pre-built evaluations for niche use cases
No dedicated support or managed service

Overview

simple-evals is an open-source toolkit by OpenAI designed for evaluating large language models (LLMs). It provides standardized methods and metrics to assess model performance, consistency, and reliability across different tasks. The tool is modular, allowing users to customize evaluations for specific needs.

Problem It Solves

It simplifies the process of benchmarking and comparing LLMs by offering reusable evaluation templates and reducing manual setup.

Target Audience: Developers and teams working with llm evaluation automation.

Inputs

• User configuration
• API credentials (if required)
• Task parameters

Outputs

• Automated task results
• Status reports
• Generated content or actions

Example Workflow

1 User configures the agent with required parameters
2 Agent receives input data or trigger
3 Agent processes the request using its core logic
4 Agent interacts with external services if needed
5 Results are returned to the user

Sample System Prompt


              You are simple-evals, an AI assistant. Help the user accomplish their task efficiently.

Tools & Technologies

LLM APIs Python

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FAQs

Is this agent open-source?: Yes
Can this agent be self-hosted?: Yes
What skill level is required?: Intermediate

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