Over 99% accuracy
Models trained specifically to tell human text from text generated by language models, with metrics validated on independent datasets.
Evitext is a desktop application for Windows and macOS designed for teachers, schools and publishers. It identifies whether a text has been generated by artificial intelligence using RoBERTa models trained at the BSC-CNS, running 100% on your own device.
ChatGPT, Claude, Gemini and other generative models produce texts that are increasingly hard to tell apart from human writing. For schools this poses a challenge: how do you assess students' work fairly when part of it may have been generated automatically?
Evitext gives a clear, technical and private answer. It shows how likely it is that a text was written by an AI, without sending the student's text to any external server.
Designed with teachers, validated on multilingual datasets and focused on real use in classrooms, departments and publishing houses.
Models trained specifically to tell human text from text generated by language models, with metrics validated on independent datasets.
Native support for Spanish, English and Catalan. The language is detected automatically and the model trained for that language is applied.
The analysis runs entirely on your computer. Not a single fragment of the student's text leaves your device. GDPR compliant by default.
Local inference optimised for modern CPUs and for Apple silicon. No Internet connection or recurring subscriptions to external services required.
Paste text directly or open complete documents. Evitext returns an overall verdict and a breakdown by fragment so you can review the detail.
A simple, teacher-oriented interface with no technical learning curve. Designed to support marking, not to replace it.
Copy the student's work or open the file directly from Evitext.
Evitext identifies whether the text is in Spanish, English or Catalan and loads the appropriate model.
The RoBERTa model processes the text on your computer, without sending it to any external server.
You get the overall probability that the text was generated by an AI.
Evitext breaks the text down and highlights the fragments most likely to be of synthetic origin.
You decide how to interpret the result: Evitext is a support tool, not a substitute for the teacher's judgement.
Evitext uses RoBERTa-based models trained at the BSC-CNS (Barcelona Supercomputing Center), Spain's leading centre for supercomputing and artificial intelligence. The application is built with industry-standard technologies and runs all inference locally.
Check assignments, essays, text commentaries and exams. A second technical opinion before grading.
A policy for responsible use of AI in the classroom, with a shared tool for teaching staff and departments.
Assessment of bachelor's and master's theses and research papers, with GDPR compliance guaranteed by local processing.
Originality checks on external contributions, manuscripts and articles before publication.