GPT‑6 Cyber
Introducing GPT‑6 Cyber, OpenAI’s cybersecurity model for finding exploitable vulnerabilities and developing fixes, trained to stay within authorized scope.
Added 7 Nov 2026
Analysed 7 Nov 2026
via 
What we found
- It sends four of the six security headers we check; missing are Referrer-Policy and Permissions-Policy.
- Built with ChatGPT Sites and Next.js, the site is hosted on Vercel and served through Cloudflare, with a domain registered in 2007.
Built with: 69 technologies · Scale-up stack
Embed this on your site
For light pages
<a href="https://firstsited.com/launch/4xkt2czs/gpt6-cyber"><img src="https://firstsited.com/badge/4xkt2czs/stack.svg" alt="GPT‑6 Cyber tech stack on FirstSited" height="28"></a>
For dark pages
<a href="https://firstsited.com/launch/4xkt2czs/gpt6-cyber"><img src="https://firstsited.com/badge/4xkt2czs/stack.svg?theme=dark" alt="GPT‑6 Cyber tech stack on FirstSited" height="28"></a>
How it fits together
Each technology runs on, or extends, the one it sits under.
Each technology links to its own page: which other new sites launched with it.
Site checks
| Custom title and meta description | |
| Open Graph tags (title, image, description) | |
| Twitter card meta tags | |
| Canonical URL declared | |
| Responsive viewport meta tag | |
| Favicon present | |
| Semantic HTML (nav, main, article) | |
| Page title is 76 characters Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible. |
| Referrer-Policy | |
| X-Frame-Options via CSP frame-ancestors | |
| Permissions-Policy experimental | |
| X-Content-Type-Options | |
| Content-Security-Policy | |
| Strict-Transport-Security | |
| X-XSS-Protection deprecated, not counted |
| Privacy policy /policies/privacy-policy/ | |
| Terms of service /policies/terms-of-use/ | |
| Consent manager OneTrust |
Mentions: GDPR, Cookies, Data Controller, DPO
| robots.txt | |
| sitemap.xml 43 URLs | |
| security.txt | |
| llms.txt optional | |
| ads.txt only for ad-funded sites | |
| humans.txt optional |
| llms.txt published not published | |
| No AI bots blocked in robots.txt | |
| Content-Signal none declared | |
| Link headers none advertised |
| State | Record | Status |
|---|---|---|
| SPF -all | Strict (-all) | |
| DMARC p=reject | Reject (strict) | |
| DKIM | Found | |
| MTA-STS | Not deployed | |
| TLS-RPT | Not configured |
Hosting and network
| Network | CLOUDFLARENET - Cloudflare, Inc., US AS13335, US |
|---|---|
| DNS | Azure DNS authoritative nameservers |
| DNSSEC | Not enabled DNS answers are unsigned |
| Certificate | Let's Encrypt valid 6 Nov 2026 to 4 Feb 2027, as captured |
| Domain age | 19.8 years registered Jan 2007, MarkMonitor Inc. |
| Green hosting | Yes per The Green Web Foundation |
| Page build | 113 JS files, 71 CSS files 4 third-party domains, code splitting |
| Brand colours |
Storage: 9 items
| Name | Lifetime | Set by |
|---|---|---|
| cf_clearance | 1y | Cloudflare |
| country | 1y | - |
| locale | session | - |
| oai-did | 1y | - |
| _cfuvid | session | Cloudflare |
| __cf_bm | < 1h | Cloudflare |
| Key | Size | Set by |
|---|---|---|
| statsig.last_modified_time.evaluations | 2 B | Statsig |
| statsig.session_id.3878934004 | 105 B | Statsig |
| statsig.stable_id.3878934004 | 38 B | Statsig |
Performance
| Measure | This site | Reading |
|---|---|---|
| Server response | 171 ms | good, faster than 67% of sites |
| Largest contentful paint | 4,364 ms | slow |
| Layout shift | 0.01 | good |
| Page weight | 6.0 MB | heavy |
| Image weight | 206 KB | light |
| Images | 4 | 1 larger than shown, 4 without width and height, 1 without alt text |
| Third-party domains | 4 | |
| Console errors | 61 | worth a look |
| Failed requests | 10 | worth fixing |
Broken requests to the site itself (10), worth fixing
- 403 /careers/?_rsc=6gtQn-QMXKYqlbTz
- 403 /news/?_rsc=6gtQn-QMXKYqlbTz
- 403 /business/customer-stories/?_rsc=6gtQn-QMXKYqlbTz
- 403 /business/partners/?_rsc=6gtQn-QMXKYqlbTz
- 403 /index/introducing-gpt-5-5/?_rsc=6gtQn-QMXKYqlbTz
- 403 /safety/?_rsc=6gtQn-QMXKYqlbTz
- 403 /trust-and-transparency/?_rsc=6gtQn-QMXKYqlbTz
- 403 /research/?_rsc=6gtQn-QMXKYqlbTz
From a single automated render of the home page. A quick guide, not a substitute for Lighthouse or field data. How we measure
Notes
-
Looks AI-built: strong AI signals.
How much the site looks AI-generated. It is a pattern match shown for interest, not a verdict.
Which signals fired
Signal Points AI palette signals +5 AI writing signals +5 AI stack signals +10 Recognised AI builder signature +100 AI layout signals +5 - Performance comes from one render on 7 November 2026 and will vary between visits.
How we know
FirstSited records what new websites are built with, usually within a day of going live. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We checked this one in full: its tech stack, DNS, security headers and page basics. This page is what we saw on 7 November 2026; the live site may have changed since.
Every technology below links to its own page: which other new sites launched with it. Watch any of them and get every new site that uses it as it goes live, from £15 a month.