Best VPN for PC and AI Security After the OpenAI Hack
Three attackers used a rival AI model against OpenAI. Here is what it means for AI security, plus our ranked picks for VPNs, keys, and password managers.
Three people. One Anthropic model. One very bad week for OpenAI's security team.
That is the short version of a story that broke this month, when CBS News reported that a trio of attackers used a rival frontier model to probe and exploit OpenAI's systems. No nation-state budget. No insider. Just three people who pointed one AI at another and let it hunt for weaknesses at machine speed. If you build with AI, ship AI, or just use it daily, this is the moment to stop treating frontier lab security as somebody else's problem. It is also the moment to check what is on your own machine, which is why we keep coming back to the same boring advice: a good password manager, 2FA everywhere, and yes, the best vpn for pc you can actually stand using.
Here is what the hack actually shows, and what to do about it.
## What three guys with a rival model actually pulled off
The mechanics matter more than the headlines. According to CBS News, the group leaned on an Anthropic model to automate reconnaissance and exploitation against OpenAI's infrastructure. Think of it as a tireless intern who never sleeps, never gets bored, and can read a thousand pages of API documentation in the time it takes you to make coffee.
Three things made that possible:
1. **Model vs. model is the new attack surface.** Frontier labs now train models that are genuinely good at finding bugs in code. Point one at a competitor's stack and you have an automated red team that costs a few hundred dollars a month.
2. **The perimeter is a suggestion.** Labs expose APIs, model endpoints, and support tooling. Every one of those is a door.
3. **Speed beats stealth.** A human attacker probes for weeks. A model probes for hours, and it does not care about being noisy.
None of this required zero-day magic. It required patience, an API key, and a target that assumed attackers move at human speed.
## The uncomfortable part for everyone who is not OpenAI
You are not OpenAI. You also do not have their security budget. That asymmetry cuts both ways: you are a smaller target, and you are a softer one.
The same playbook works against a 12-person startup. An attacker points a capable model at your public endpoints, your GitHub history, your support inbox, and your cloud config. If your secrets live in a `.env` file that got committed in 2024 and never rotated, the [model finds it](/tech/blog/openai-security-breach-lessons-for-protecting-your-ai-integrations) before lunch.
So the practical question is not "how do I defend against a frontier lab attack." It is "what is the cheapest set of habits that removes 90 percent of the easy wins."
## Our selection criteria
We ranked the defenses below on four things:
- **Does it stop the actual attack pattern?** Automated probing, credential stuffing, endpoint abuse.
- **Cost in USD, per month, for a small team.** No enterprise quotes.
- **Time to deploy.** If it takes a quarter, it does not count.
- **Does it work in the US, UK, and EU?** Data residency and privacy rules differ, and we are not pretending otherwise.
## The ranked list
### 1. Zero-trust access plus a hardware key: the one to buy
**What it is:** Hardware security keys (YubiKey 5 series, around $55 each in the US and roughly £50 / €60 in Europe) plus a zero-trust access layer like Cloudflare Access (free for up to 50 users, then $7 per user per month).
**Why it wins:** The reported attack relied on automated probing. Hardware keys kill credential phishing outright, and zero-trust access means your internal tools are not sitting on the open internet waiting to be found. This is the single highest-leverage change for a small team.
**Who should skip it:** Solo developers with no internal tooling and no customer data. You have bigger problems, like backups.
### 2. A password manager with passkey support: the value pick
**What it is:** 1Password ($7.99 per month for a family or small team plan) or Bitwarden (free tier, $10 per year for premium).
**Why it wins:** Most breaches still start with reused credentials. Passkeys plus a manager removes that entire class of failure for the price of two coffees a month. Bitwarden is the value pick if budget is tight.
**Who should skip it:** Nobody, honestly. If you are still typing the same password into twelve services, fix that before you read another word.
### 3. A VPN for your dev machines: the one people forget
**What it is:** A reputable VPN on every laptop that touches production. Our pick for most readers is Mullvad (€5 per month, about $5.40, audited, no email required) or Proton VPN (free tier, $4.99 per month for Plus).
**Why it wins:** Developers work from cafes, co-working spaces, and hotel Wi-Fi. An unencrypted session on a public network is an invitation. A VPN does not stop a determined attacker, but it removes the passive sniffing layer entirely, and it is the cheapest habit on this list.
**Who should skip it:** Anyone already on a corporate zero-trust network with device-level encryption. You have this covered.
If you are shopping for the best vpn for pc, check three things: a no-logs audit, a jurisdiction outside the UK and US intelligence-sharing arrangements, and a kill switch that actually works. Mullvad and Proton both pass. Most "free forever" VPNs do not, and some of them monetize your traffic. That is not a trade you want to make while debugging production.
### 4. Model-aware monitoring: the one to avoid for now
**What it is:** Tools that claim to detect AI-driven attacks by analyzing traffic patterns.
**Why we are cautious:** The category is young, the claims are large, and the pricing is enterprise-only. We have not seen a small-team product here that justifies its cost in 2026. If a vendor quotes you a number without a trial, walk away.
**Who should skip it:** Everyone below 200 employees. Revisit in a year.
## What we recommend
If you do one thing this week, buy hardware keys and turn on zero-trust access. That is roughly $110 for two keys plus $0 to $7 per user per month, and it closes the door the reported attack walked through.
If you do two things, add Bitwarden at $10 per year and rotate every secret that has ever touched a git repository. That last part is free and it is the step most teams skip.
If you do three, put a VPN on every laptop that leaves the office. Mullvad at about $5.40 per month is our pick. It is not glamorous. It is the difference between a bad day and a very bad week.
What we would not buy right now: anything marketed as ["AI-powered threat detection"](/coupon/blog/ai-gone-rogue-how-to-detect-and-prevent-unauthorized-ai-communications) for small teams. The frontier labs are still figuring out their own security. A startup promising to solve it for $99 a month is selling you a dashboard, not a defense.
## FAQ
**Did the attackers really use a rival model to hack OpenAI?**
Yes, according to CBS News reporting. The group used an Anthropic model to automate parts of the attack against OpenAI's systems. It is the clearest public example yet of model-vs-model attacks.
**Does this mean frontier lab security is broken?**
It means frontier lab security is hard, and that automated attacks change the math. The labs will harden. The lesson for everyone else is that the same techniques scale down to smaller targets.
**Do I need a VPN if I use a password manager and hardware keys?**
They solve different problems. Keys stop phishing, a manager stops credential reuse, and a VPN stops passive network snooping. If your developers work from anywhere but a locked office, you want all three.
Frequently asked questions
Did the attackers really use a rival model to hack OpenAI?
Yes, according to CBS News reporting. The group used an Anthropic model to automate parts of the attack against OpenAI's systems. It is the clearest public example yet of model-vs-model attacks.
Does this mean frontier lab security is broken?
It means frontier lab security is hard, and that automated attacks change the math. The labs will harden. The lesson for everyone else is that the same techniques scale down to smaller targets.
Do I need a VPN if I use a password manager and hardware keys?
They solve different problems. Keys stop phishing, a manager stops credential reuse, and a VPN stops passive network snooping. If your developers work from anywhere but a locked office, you want all three.
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