Quick answer
Uncensored AI models are open-weight language models that have been modified to refuse fewer requests. In a new video, Mark Kashef argues that they are worth understanding because mainstream assistants increasingly block well-meant security work, such as checking your own app for weaknesses. The legitimate use is defensive testing of systems you own or have written permission to test. The same model could help someone attack a system they do not own, which is illegal in the UK. Removing refusals does not make a model smarter, and downloaded models bring their own risks, so treat this as a specialist tool, not an everyday assistant.
Key takeaways
- “Uncensored” means fewer refusals, not more intelligence. Quality can even drop
- The main legitimate use is defensive security testing of your own apps, sites and systems
- Mark shows three ways to run one: a paid hosted provider, a rented cloud server, or your own computer
- Only test what you own or have written permission to test. Unauthorised access is a crime under the Computer Misuse Act 1990
- Downloaded models and their files can carry risks, so check them before you run them
- Rented GPUs bill by the hour, so set limits and shut them down
- Results from AI security scans need checking: Mark warns they produce false positives
🛠️ Practical guides
Ready to put this into practice? These step-by-step guides answer two common follow-up questions:
- How to Check a Downloaded AI Model Before You Run It on Your Computer — what to check before you download and run an open or uncensored model
- How to Avoid Surprise Bills When You Rent a Cloud GPU for AI — how to cap spending and shut down rented GPU servers properly
In this guide
- What are uncensored AI models?
- Why does Mark Kashef say you need to learn them?
- What did the test on his own app show?
- What are the legitimate uses of uncensored AI?
- What are the three ways to run an uncensored model?
- What are the risks of uncensored AI models?
- Is it legal to use uncensored AI for security testing?
- What does the video not confirm?
- How should a small business start safely?
- Who are uncensored AI models right for?
- Watch: the source video
- Frequently asked questions
- The bottom line
- Related posts
Have you ever asked an AI assistant to help check your own website for security holes, only to be told it cannot help? You are not alone. As the big AI providers tighten their safety rules, some genuine security questions now get blocked along with the harmful ones.
In a new video, AI consultant Mark Kashef makes the case that you should learn how uncensored AI models work, so you have a plan B for testing your own apps. Below we explain what he shows, where these models genuinely help, and the legal, safety and cost risks you need to weigh first. We will not cover how to misuse them, and neither should you.
What are uncensored AI models?
An uncensored AI model is a language model that has been changed so it is less likely to refuse a request. Most start life as ordinary open-weight models (models whose files anyone can download and run). Someone then adjusts them to strip out much of the refusal behaviour.
You will often see the term “abliterated” for one common method, which Mark pronounces as “obliterated”. The model still knows what it knew before. It is simply more willing to answer.
| Mainstream assistant | Uncensored model | |
|---|---|---|
| Refusals | Frequent on sensitive topics, including some security work | Rare |
| Safety filtering | Built in by the provider | Largely removed |
| Quality | Top-tier frontier models | Usually smaller open models; Mark says quality can drop |
| Where it runs | Provider’s cloud | A paid host, a rented server or your own computer |
| Who is responsible for misuse | Shared with the provider | Almost entirely you |
⚠️ Warning: Fewer refusals means fewer guard rails for you too. An uncensored model will not stop you from doing something illegal or unsafe, so your own judgement and permissions have to do that job.
Why does Mark Kashef say you need to learn them?
Because, he argues, mainstream AI keeps getting more restrictive, and honest security work is getting caught in the net. Mark says even well-meant prompts that mention cybersecurity now get flagged, and that a tool he relied on for creating assets would not help with this very video because it contained the word “cyber”.
He also mentions a popular reverse-engineering project that people were using with mainstream coding assistants, and says using it now risks a rejected prompt or even an account ban. We covered a related development in our round-up on Claude’s reverse engineering block.
He is upfront that this technology can be used “for good and evil”. His pitch is aimed at the well-intentioned: learn it so you can protect yourself, and have a backup if your usual assistant stops helping.
What did the test on his own app show?
Mark built a test app called Coach Vault with Claude, filled it with made-up clients, payments and notes, and hosted it on a real server with a real database. He then pointed a small uncensored model, running on his own computer, at it and asked it to behave like an outside attacker with no account.
According to the video, the model got into the app, pulled the fake client records, calendars, session notes and invoices, and took over his admin account. It then explained each step it took and suggested how to fix the problems.
The tools he gave it were a browser automation tool (Playwright), a web search and scraping tool (Firecrawl) and an open-source vulnerability scanner (Nuclei).
💡 Tip: The useful lesson is not the uncensored model itself. It is that apps built quickly with AI (“vibe coded” apps) can ship with serious holes, and that a structured check before launch is worth doing. Our post on checking a WordPress site for the PHP2Shell risk shows a similar defensive mindset.
What are the legitimate uses of uncensored AI?
The legitimate uses are defensive and research work where you are authorised. For example:
- Testing your own app or website before launch, on a copy with fake data, as Mark did
- Reviewing your own code for weaknesses that a mainstream assistant refuses to discuss
- Security research and training inside a lab you control
- Authorised penetration tests carried out by professionals with a signed scope
- Private, offline AI use, where running a model on your own machine keeps data off third-party servers
What is not a legitimate use: probing anyone else’s site, account or network, or anything you would not be comfortable explaining to the owner. If in doubt, do not run it.
Thinking of trying a local model? Before you download anything, read our step-by-step guide: How to Check a Downloaded AI Model Before You Run It on Your Computer.
What are the three ways to run an uncensored model?
Mark walks through three routes, from easiest to most hands-on. We summarise them at a high level here so you can judge the trade-offs; this is not a setup tutorial.
| Option | How it works | Pros | Cons |
|---|---|---|---|
| 1. Hosted provider | Pay a company that hosts uncensored models and access them with an API key | Fastest to start; no hardware to manage | Providers charge a premium; Mark says they ask for identity checks (KYC); your prompts go to a third party |
| 2. Rented cloud server | Rent a GPU server (he uses RunPod) and host a model yourself | No middleman markup; choose your own model | You maintain it and must shut it down, or the bill keeps running |
| 3. Your own computer | Download a model and run it locally (the description mentions LM Studio) | Private; no hourly bill | Needs capable hardware; downloaded files carry risks |
In all three, Mark connects the model to a harness, which he describes as the tools around the model’s “brain”. He uses one he calls DeepSeek Harness and gets Codex to do most of the setup by giving it the official documentation.
Some numbers from the video: his chosen cloud setup was estimated at about $0.22 an hour, or roughly $158 a month if left running around the clock. His local setup reached about 105 tokens per second. These are his figures for his setup, not benchmarks.
💡 Tip: If you rent a GPU, set spending limits and an automatic shutdown before you start. Our guide How to Avoid Surprise Bills When You Rent a Cloud GPU for AI walks through it.
What are the risks of uncensored AI models?
The main risks are legal, security, cost and quality.
- Legal: using one against systems you do not own can be a criminal offence, whatever your intentions
- Downloaded files: Mark points to a security write-up warning that some downloadable models could be tampered with to leak data such as credentials. Model files in older formats can also run code when loaded
- Tool access: a model with browser, terminal or file access can do real damage if it misreads an instruction
- Cost: forgotten cloud servers keep billing
- False positives: Mark says open models can claim a hundred ways in when only a handful really work, which is why he adds a scanner to double-check
- Quality: removing refusals can make answers worse, not better
- Account and provider rules: using a mainstream assistant to set up tools meant to get around its own safety rules may break its terms of use
⚠️ Warning: Never connect a test model to your real credentials, live customer data or production systems. Use a copy with fake data, just as Mark did with Coach Vault.
Is it legal to use uncensored AI for security testing?
Owning or running the model is not the issue in itself. What you point it at is. In the UK, the Computer Misuse Act 1990 makes unauthorised access to computer systems an offence. Good intentions are not a defence if you did not have permission.
- Test only systems you own, or that you have written permission to test
- Agree the scope in writing: which sites, which dates, which techniques
- If you find a problem in someone else’s product by accident, report it through their vulnerability disclosure route rather than probing further. The NCSC publishes a vulnerability disclosure toolkit
- Check the licence of any model you download and the terms of any provider you use
This is general information, not legal advice. If you are testing for clients or at work, get qualified advice and a signed agreement first.
What does the video not confirm?
🔎 Unconfirmed / rumour: Several points in the video are Mark’s own claims or reports we have not confirmed: that mainstream assistants now block most cybersecurity prompts and push users to downgrade models; that the reverse-engineering project he mentions now risks bans; the specific hosted providers he names and their verification checks; and the security write-up about downloaded models secretly sending data back. His Coach Vault results come from his own test app, so we cannot say how typical they are.
Mark also promotes Lockpick, an app-scanning service his team built, and offers a paid “Defensive AI Kit”. We have not tested either, and this article is not sponsored by him.
How should a small business start safely?
Start with the safest option that answers your question, and only move to uncensored models if you genuinely need them.
- Write down what you want to test and confirm you own it or have written permission
- Try mainstream and established tools first. Many security scanners and code reviewers work without an uncensored model
- Make a test copy of your app with fake data, separate from your live system
- Pick the route that suits you: hosted for speed, cloud for flexibility, local for privacy
- Check any model before you run it (see our download checklist)
- Cap your spending if you rent hardware (see our cloud GPU guide)
- Verify every finding before you act on it, and fix the real issues first
- Shut it all down and remove any keys when you are finished
Who are uncensored AI models right for?
They suit you if: you build or run your own apps, you understand basic security, you are testing in a safe copy, and mainstream assistants keep refusing reasonable defensive questions.
They matter less if: you mainly use AI for writing, marketing or admin, or you are not comfortable managing servers and permissions. In that case a professional security check, or a reputable scanning service, is usually the better spend.
Want a private way to experiment with AI on your own machine? Start with our comparison: Mac, NVIDIA or Your Old Computer: Which Should Run Your AI Agents?.
Watch: the source video
What this video covers: what uncensored AI models are, a test of his own deliberately vulnerable app, and three ways to run one: a hosted provider, a RunPod cloud server and a local model, plus the cost and download risks.
Video: Mark Kashef (@Mark_Kashef). This summary and the opinions in it are our own. Mark’s results come from his own test app and have not been independently verified by us.
Frequently asked questions
What does uncensored AI mean?
It means a model that has been modified to refuse fewer requests. It does not mean the model is smarter or more accurate.
What is an abliterated model?
“Abliterated” is a common name for an open model that has had its refusal behaviour removed. Mark Kashef calls these “obliterated” models in his video.
Is it illegal to use an uncensored AI model?
Running one is not illegal in itself, but using it to access systems without permission is an offence under the UK Computer Misuse Act 1990. Only test what you own or are authorised to test.
Are uncensored models better than ChatGPT or Claude?
Usually not. They tend to be smaller open models, and Mark notes that removing refusals can reduce quality. Their only advantage is fewer refusals.
Is it safe to download AI models from Hugging Face?
Mostly, if you stick to trusted publishers and safe file formats, but not automatically. Our guide How to Check a Downloaded AI Model Before You Run It on Your Computer covers what to check.
How much does it cost to run an uncensored model in the cloud?
In Mark’s example, about $0.22 an hour, or around $158 a month if left on all the time. Prices vary by provider and hardware.
Can an uncensored model fix my app’s security?
It can point out possible weaknesses, but it can also be wrong. Verify findings, fix real issues and get professional help for anything holding customer data.
The bottom line
Mark Kashef’s video is a useful reminder that AI-built apps need proper security checks, and that mainstream assistants will not always help with them. Uncensored AI models can fill that gap for defensive testing, but they shift all the responsibility onto you: legally, financially and technically. Your next step: list the apps you own, make a safe test copy of one, and decide whether an established scanner or a professional check covers what you need before reaching for an uncensored model.
Related posts
- PHP2Shell: How to Check If Your WordPress Site Is at Risk
- GPT-7 Bel: OpenAI’s Offline Internet, Claude’s Reverse Engineering Block and This Week’s AI News
- Should You Run Muse Spark Open Locally or Use It Through an API?

[…] Hack-testing (also called penetration testing or pen testing) means trying to break into your own software the way an attacker would, so you can fix the weak spots first. Uncensored AI models are versions of open-weight models with their usual refusals removed. We explained what they are, and their risks, in uncensored AI models: uses and real risks. […]