What happened to the URL on file for TLM Playground?

URL unreachable The URL on file (https://tlm.cleanlab.ai/) did not respond across three consecutive checks; the streak completed on 2026-09-28.

This reports what that URL did, not a claim that TLM Playground itself is gone: the address on file does not confidently match TLM Playground's own domain, so if it turns out to be a marketplace or listing page rather than TLM Playground's own site, this observation is still accurate about the URL, just not about the product. See the methodology for how the match is made.

The vendor's own description, unedited:
TLM Playground is a web-based, interactive tool that serves as a testing environment for Cleanlab's Trustworthy Language Model (TLM). This tool enables users to explore and experiment with the capabilities of TLM directly from their web browsers. The Trustworthy Language Model, developed by Cleanlab, is focused on offering reliable and trustworthy language modeling services and this tool provides a practical, user-friendly interface for testing this advanced technology. The primary requirement to use TLM Playground is that JavaScript must be enabled in the user's web browser. It's important to note that as it is a sandbox environment, results and testing scenarios in the Playground are not necessarily representative of the full capabilities or potential use-cases of the full-fledged TLM product by Cleanlab. For more information, users are advised to visit Cleanlab's official website.

Live alternatives

No active same-category alternatives in the registry yet. The tools index carries everything else that is live.

How this was decided

Not an editorial call. The URL on file failed three consecutive checks, with a confirmation re-probe before the streak counted (a bot-wall response never counts as one), and the 3-miss rule marks the listing discontinued automatically. If the URL responds again, the registry restores it on its own: warn first, then active. Both directions are recorded as events.

Spot an error? Tell us. Corrections to the record append, they never rewrite.