CheckforAI

[Adoption Judgment] CheckforAI has been confirmed as a discontinued service. It holds historical reference value but is no longer recommended for actual use. [What It Did] It allowed users to submit text or upload documents and used OpenAI's RoBERTa model along with its own proprietary models to generate sentence-by-sentence AI-likelihood scores, similar to a detailed similarity report. It was primarily advertised for essays, emails, and general AI content checks. Completely free with registration required, and no usage caps were mentioned in available sources (according to community claims). [Suitable For / Not Suitable For] It was once targeted at students, educators, content creators, and anyone needing a quick, free AI writing check. It was not suitable for those requiring high accuracy or reliable, production-ready detection, nor for institutional plagiarism verification. It was not a turnitin-like plagiarism checker, but a lightweight AI-specific detector—now offline. [Community Consensus & Discussion Quality] Evidence consists mainly of listicle inclusions, brief recommendations, and social media retweets rather than rigorous tests or official accuracy data.