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Inspect

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UK AISI open framework for evaluating language-model agents.

Inspect is an open-source evaluation framework from the UK AI Security Institute. It supports model and agent evaluations, including sandboxed tasks. A separate tool handles pull-request commenting.

Model support
Multi-model
Deployment
Self-hosted
Open source
Yes
License
MIT
Pricing model
Free
Added / updated
19 Aug 2026 / 19 Aug 2026

inspect.aisi.org.uk · Docs · Source

Assessment

Inspect suits rigorous agent evaluations where task design and reproducibility matter. Its footprint exceeds Promptfoo; pull-request comments and merges require another tool.

Strengths

  • Public evaluation framework with sandbox-aware tasks.
  • MIT, model-agnostic.
  • Agent-focused evaluation alongside chat-prompt tests.

Limitations

  • Steeper than product eval tools.
  • No GitHub app.
  • Task design remains the operator's responsibility.

Fields last checked against primary sources on . Pricing and plan names change; check the vendor URL.