# unslop > Free, unlimited AI-text detection calibrated for academic writing. 0.4% false positive rate on real academic prose (99.6% specificity), measured on 15,900 documents. No account, no word limit, text is never stored. ## Tools - [AI detector](https://unslop.run/app): paste text or upload .pdf/.docx/.tex, scored per paragraph, unlimited. - [URL scan](https://unslop.run/check): score a web page or arXiv paper by link. ## Research - [All LLMs are liberal and left. Yes, even Grok, half the time.](https://unslop.run/blog/political-compass-of-llms): I ran the politicalcompass.org test on all major LLMs. They all landed in the lib-left quadrant. Grok as well, except when it didn't. There were two distinct personas that Grok assumed. This article aims to explain exactly how these results come about and what is happening with Grok specifically. - [Over 30% of papers submitted on arXiv read as AI-written](https://unslop.run/blog/measuring-ai-writing-on-arxiv): I scored the full text of over 12,000 arXiv papers from 2021 to 2026 across ten different fields and found that about a third of the papers currently published on arXiv read as machine-written. There is also a clear upward trend. In this post, I try to give insight into what these results mean and what the limitations of my approach are. - [How the unslop AI detector works](https://unslop.run/blog/how-our-ai-text-detector-works): What it was trained on, how it is calibrated, why it was built, and what makes it better than other detectors for academic writing. ## Guides - [does grammarly get flagged as ai](https://unslop.run/guides/does-grammarly-get-flagged-as-ai) - [falsely accused of using ai](https://unslop.run/guides/falsely-accused-of-using-ai) - [how turnitin ai detection works](https://unslop.run/guides/how-turnitin-ai-detection-works) - [non native english ai detection](https://unslop.run/guides/non-native-english-ai-detection) - [turnitin ai false positive rate](https://unslop.run/guides/turnitin-ai-false-positive-rate) - [what a turnitin ai score means](https://unslop.run/guides/what-a-turnitin-ai-score-means) - [why ai detectors flag human writing](https://unslop.run/guides/why-ai-detectors-flag-human-writing) - [writing flagged as ai what to do](https://unslop.run/guides/writing-flagged-as-ai-what-to-do) - [ai detection short text](https://unslop.run/guides/ai-detection-short-text) - [ai detection statistics](https://unslop.run/guides/ai-detection-statistics) - [checking a pdf or word document](https://unslop.run/guides/checking-a-pdf-or-word-document) - [how ai detectors work](https://unslop.run/guides/how-ai-detectors-work) - [mixed human ai writing](https://unslop.run/guides/mixed-human-ai-writing) - [perplexity and burstiness](https://unslop.run/guides/perplexity-and-burstiness) - [why ai detectors disagree](https://unslop.run/guides/why-ai-detectors-disagree) - [ai detection academic papers](https://unslop.run/guides/ai-detection-academic-papers) - [ai detection journal submission](https://unslop.run/guides/ai-detection-journal-submission) - [ai detection thesis dissertation](https://unslop.run/guides/ai-detection-thesis-dissertation) - [ai detector for essays](https://unslop.run/guides/ai-detector-for-essays) - [latex ai detection](https://unslop.run/guides/latex-ai-detection) - [will my paper be flagged as ai](https://unslop.run/guides/will-my-paper-be-flagged-as-ai) - [ai detector no word limit](https://unslop.run/guides/ai-detector-no-word-limit) - [are ai detectors accurate](https://unslop.run/guides/are-ai-detectors-accurate) - [best ai detectors](https://unslop.run/guides/best-ai-detectors) - [chatgpt detector](https://unslop.run/guides/chatgpt-detector) - [free ai detectors](https://unslop.run/guides/free-ai-detectors) - [how accurate is turnitin ai detection](https://unslop.run/guides/how-accurate-is-turnitin-ai-detection) - [is copyleaks ai detector accurate](https://unslop.run/guides/is-copyleaks-ai-detector-accurate) - [is grammarly ai detector accurate](https://unslop.run/guides/is-grammarly-ai-detector-accurate) - [is quillbot ai detector accurate](https://unslop.run/guides/is-quillbot-ai-detector-accurate) - [is scribbr ai detector accurate](https://unslop.run/guides/is-scribbr-ai-detector-accurate) - [is zerogpt accurate](https://unslop.run/guides/is-zerogpt-accurate) - [safeassign ai detection](https://unslop.run/guides/safeassign-ai-detection) - [turnitin vs gptzero](https://unslop.run/guides/turnitin-vs-gptzero) - [ai rewriter](https://unslop.run/guides/ai-rewriter) - [chatgpt prompts to avoid ai detection](https://unslop.run/guides/chatgpt-prompts-to-avoid-ai-detection) - [how to avoid ai detection](https://unslop.run/guides/how-to-avoid-ai-detection) - [how to avoid turnitin ai detection](https://unslop.run/guides/how-to-avoid-turnitin-ai-detection) - [make ai text sound human](https://unslop.run/guides/make-ai-text-sound-human) - [paragraph rewriter](https://unslop.run/guides/paragraph-rewriter) - [paraphrasing to avoid ai detection](https://unslop.run/guides/paraphrasing-to-avoid-ai-detection) - [paraphrasing tools detection](https://unslop.run/guides/paraphrasing-tools-detection) - [reword tool](https://unslop.run/guides/reword-tool) - [rewrite essay to avoid ai detection](https://unslop.run/guides/rewrite-essay-to-avoid-ai-detection) - [sentence rewriter](https://unslop.run/guides/sentence-rewriter) - [what makes text read as ai](https://unslop.run/guides/what-makes-text-read-as-ai) - [ai detector for teachers](https://unslop.run/guides/ai-detector-for-teachers) - [what ai detectors teachers use](https://unslop.run/guides/what-ai-detectors-teachers-use) - [ai detection false positive examples](https://unslop.run/guides/ai-detection-false-positive-examples) - [ai detection in high school](https://unslop.run/guides/ai-detection-in-high-school) - [ai detection in online exams](https://unslop.run/guides/ai-detection-in-online-exams) - [ai detection personal statement](https://unslop.run/guides/ai-detection-personal-statement) - [can ai detectors be wrong](https://unslop.run/guides/can-ai-detectors-be-wrong) - [can google docs detect ai](https://unslop.run/guides/can-google-docs-detect-ai) - [can i use turnitin ai detector](https://unslop.run/guides/can-i-use-turnitin-ai-detector) - [can teachers detect chatgpt](https://unslop.run/guides/can-teachers-detect-chatgpt) - [canvas ai detection](https://unslop.run/guides/canvas-ai-detection) - [check your essay before submitting](https://unslop.run/guides/check-your-essay-before-submitting) - [do universities use ai detectors](https://unslop.run/guides/do-universities-use-ai-detectors) - [does editing ai text remove the flag](https://unslop.run/guides/does-editing-ai-text-remove-the-flag) - [does turnitin detect ai](https://unslop.run/guides/does-turnitin-detect-ai) - [does turnitin detect chatgpt](https://unslop.run/guides/does-turnitin-detect-chatgpt) - [does turnitin detect copy and paste](https://unslop.run/guides/does-turnitin-detect-copy-and-paste) - [find your own baseline score](https://unslop.run/guides/find-your-own-baseline-score) - [group work ai detection](https://unslop.run/guides/group-work-ai-detection) - [how to prove you wrote your essay](https://unslop.run/guides/how-to-prove-you-wrote-your-essay) - [international students ai detection](https://unslop.run/guides/international-students-ai-detection) - [neurodivergent writing ai detection](https://unslop.run/guides/neurodivergent-writing-ai-detection) - [professor thinks i used ai](https://unslop.run/guides/professor-thinks-i-used-ai) - [quillbot ai detection](https://unslop.run/guides/quillbot-ai-detection) - [resubmitting after an ai flag](https://unslop.run/guides/resubmitting-after-an-ai-flag) - [turnitin ai checker free](https://unslop.run/guides/turnitin-ai-checker-free) - [turnitin flagged me but i didnt use ai](https://unslop.run/guides/turnitin-flagged-me-but-i-didnt-use-ai) - [what ai percentage is too high](https://unslop.run/guides/what-ai-percentage-is-too-high) - [what happens to text you paste](https://unslop.run/guides/what-happens-to-text-you-paste) - [what happens when turnitin flags ai](https://unslop.run/guides/what-happens-when-turnitin-flags-ai) - [what percentage of ai is acceptable](https://unslop.run/guides/what-percentage-of-ai-is-acceptable) - [why good writing gets flagged more](https://unslop.run/guides/why-good-writing-gets-flagged-more)