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Simon Willison unveils "smevals" AI evaluation suite

By PulseAugur Editorial · [2 sources] ·

Simon Willison has developed "smevals," a new evaluation suite designed to assess the capabilities of AI models, prompts, and harnesses. This tool, built in collaboration with Jesse Vincent's Prime Radiant applied AI research lab, allows users to create and run evaluation suites against various models, grade the results, and generate reports. Willison describes smevals as his third iteration on an evals framework, aiming to provide a more effective approach for evaluating AI performance. AI

IMPACT Provides a new framework for developers to test and compare AI model performance.

RANK_REASON The item describes a new tool for evaluating AI models, not a frontier model release or significant industry event.

Read on Mastodon — mastodon.social →

AI-generated summary · Google Gemini · from 2 sources. How we write summaries →

Simon Willison unveils "smevals" AI evaluation suite

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The item describes a new tool for evaluating AI models, not a frontier model release or significant industry event.
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COVERAGE [2]

  1. Simon Willison TIER_1 English(EN) ·

    smevals - a small eval suite for evaluating models, prompts, and harnesses

    <p><strong><a href="https://primeradiant.com/blog/2026/smevals.html">smevals - a small eval suite for evaluating models, prompts, and harnesses</a></strong></p> I've been working with Jesse Vincent's <a href="https://primeradiant.com">Prime Radiant</a> applied AI research lab bui…

  2. Mastodon — mastodon.social TIER_1 English(EN) · [email protected] ·

    smevals - a small eval suite for evaluating models, prompts, and harnesses https://simonwillison.net/2026/Jul/31/smevals/#atom-everything # AI # OpenSource # LL

    smevals - a small eval suite for evaluating models, prompts, and harnesses https://simonwillison.net/2026/Jul/31/smevals/#atom-everything # AI # OpenSource # LLM

    LINKS simonwillison.net/…/smevals

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