Inspect AI vs OpenAI Evals

A side-by-side look at pricing, capabilities, pros, cons, and our editorial scores.

Tagline

Inspect AI

Open-source LLM evaluation framework from the UK AI Security Institute with 200+ built-in benchmarks.

OpenAI Evals

OpenAI's open-source framework for benchmarking LLMs against a shared registry of evaluations.

Pricing

Inspect AI

Free· Free and open source (MIT-style license); you pay only for underlying model API usage.

OpenAI Evals

Free· Free (MIT); you pay OpenAI API costs for eval runs

Free trial

Inspect AI

Yes

OpenAI Evals

Yes

API

Inspect AI

Yes

OpenAI Evals

Not listed

Platforms

Inspect AI

apicliwebvscode-extension

OpenAI Evals

cli

Open source

Inspect AI

Yes · MIT

OpenAI Evals

Yes · NOASSERTION

GitHub stars

Inspect AI

2,885

checked 2026-09-29

OpenAI Evals

19,524

checked 2026-09-29

Last GitHub push

Inspect AI

2026-09-29

OpenAI Evals

2026-04-14

First commit

Inspect AI

2023-11

OpenAI Evals

2023-01

Company

Inspect AI

UK AI Security Institute

OpenAI Evals

OpenAI

Model used

Inspect AI

Multi-model

OpenAI Evals

OpenAI GPT models (extensible)

Best for

Inspect AI

Pick Inspect AI if you're an AI safety researcher or ML engineer who needs a rigorous, auditable, self-hosted framework for benchmarking and red-teaming LLMs.

OpenAI Evals

Pick OpenAI Evals if you want a free, code-first, reproducible eval harness for GPT-based systems with a large registry of ready-made benchmarks.

Not for

Inspect AI

Skip it if you want a hosted, click-through eval dashboard or a lightweight prompt-testing tool for non-technical users.

OpenAI Evals

Skip it if you want a polished hosted dashboard, non-OpenAI-first provider support, or a no-code eval workflow for PMs.

Editorial score

Inspect AI

7.2 / 10

OpenAI Evals

8.1 / 10

Use cases

Inspect AI

llm-benchmarkingagent-evaluationsafety-testingcapture-the-flagcustom-evals

OpenAI Evals

llm-benchmarkingregression-testingmodel-graded-evalprompt-evaluationcustom-evals

Pros

Inspect AI

Backed by the UK AI Security Institute — serious pedigree for safety work
200+ pre-built evaluations ready to run out of the box
Supports 20+ model providers plus sandboxed code execution
Composable Python API with CLI, Inspect View UI, and VS Code extension
Fully open source with no vendor lock-in

OpenAI Evals

Large public registry of ready-to-run evals
MIT-licensed and fully open source
Supports basic, model-graded, and custom evals
Canonical format many published benchmarks adopt
W&B and Snowflake logging out of the box

Cons

Inspect AI

Python-first — no low-code path for non-engineers
Running large eval suites incurs real model API costs
Steeper learning curve than hosted eval platforms

OpenAI Evals

Registry and defaults are OpenAI-centric
Model-graded evals can rack up API costs fast
UX is CLI + YAML, no hosted dashboard
Less actively iterated than commercial rivals

Website

Inspect AI

inspect.aisi.org.uk

OpenAI Evals

github.com

Editorial score: rule-based, 0–10, from AI-assisted profile inputs (see /methodology) — not a user rating; “—” means unscored. “Not listed” means we have no record of it, not that it is absent. GitHub figures and prices carry the date they were checked or captured; prices are shown as published, unconverted.

Pick Inspect AI if

✅ Backed by the UK AI Security Institute — serious pedigree for safety work
✅ 200+ pre-built evaluations ready to run out of the box
✅ Supports 20+ model providers plus sandboxed code execution
✅ Composable Python API with CLI, Inspect View UI, and VS Code extension

Pick OpenAI Evals if

✅ Large public registry of ready-to-run evals
✅ MIT-licensed and fully open source
✅ Supports basic, model-graded, and custom evals
✅ Canonical format many published benchmarks adopt

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