Side by side
Inspect AI vs Tangle
Both stand on ai agent evaluation tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APIExtension
Choose Inspect AI if you need a free, self-hosted framework to evaluate language models across varied task types, with broad provider and agent support. Look elsewhere if you need evaluation runs without access to a model or a hosted deployment.
Visit Inspect AI Free plan APILinuxWeb
Tangle combines agent sandboxes, run records, analysis, and review outputs, with a separate model router. Before choosing it, note the no-credit free plan and the disclosed encryption risk on two self-managed hosts.
Visit TangleThe facts
| Inspect AI | Tangle | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Extension | API, Linux, Web |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 1 |
| Maker | Not published | Not published |
| Website | inspect.aisi.org.uk | tangle.tools |
| On ai agent evaluation tools | #18 of 28 | #22 of 28 |
Inspect AI: what it does well
- Free, open-source framework for model evaluations
- More than 200 pre-built evaluations
- Supports more than 20 model providers
- Includes a VS Code extension and web-based result viewer
- Supports MCP tools and multiple agent integrations
What to know first
- Evaluation development and runs require access to a model
- Self-hosted deployment requires teams to manage their own environment
Tangle: what it does well
- Sandbox includes shell, files, ports, and desktop.
- Run records capture tool use, tokens, and cost.
- Findings can become issues or pull requests.
- Router supports OpenAI and Anthropic SDKs.
- Free plan is available.
What to know first
- Free plan includes no AI model credit.
- Prepaid credit is required before using AI models.
- Two dedicated hosts lack full-disk encryption.
- Hosted assistants are described as a preview.
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