How to Host a Website on a VPS: A Beginner's Guide
Seven steps to host a website on a VPS: pick a server, connect over SSH, secure it, install a web server, upload your site, point your domain, and add HTTPS.
Every model in the Carpathian platform answers in the same chat and through the same API, so picking one comes down to the job you need done. Some work needs the most reasoning you can get, some needs a fast answer at a low rate, and some needs to run thousands of times a day without anyone watching.
This is what each model is for, the kind of work to hand it, and how to use it.
Phoenix, for security work and hard code
Phoenix is our most powerful model, and it is built for security. It is the model to bring in when the question is whether something can be broken, and how to make sure it cannot.
Hand it a pull request and it reads for the flaws attackers look for first: injection, broken authorization, secrets left in code, unsafe deserialization, a query that trusts its input. It explains why each finding matters and writes the fix, not only the warning.
For penetration testing on systems you are authorized to test, Phoenix helps plan the engagement, map the attack surface, write and debug the scripts, and turn raw findings into a report a client can act on. On the defensive side it reads logs and alerts during an incident, drafts detection rules, works through a hardening checklist for a server or a cloud account, and explains what a CVE means for the version you run.
It is also our strongest model for code in general. When the change touches many files, the bug only shows up under load, or the design needs to hold for years, Phoenix is the one to reason it through.
Osprey, for code, writing and complex problems
Osprey is built to code, write and think through complex problems. It is the everyday workhorse for developers and writers: building a feature from a description, refactoring a module, tracking down a bug from a stack trace, writing the tests that should have been there, or drafting documentation, proposals and long reports.
It reads images as well as text, so you can hand it a screenshot of an error, a diagram or a photo of a whiteboard and ask about it directly. It can think a problem through before it answers, and it holds 32,768 tokens of context, enough for a long thread or a large file pasted in whole. It comes with an AI plan.
Osprey Lite is the free unlimited AI that any user can chat with - with or without an account. It handles everyday questions with unlimited chat: explaining a concept, drafting an email, summarizing something you paste in, or talking through an idea. It reads images, thinks before it answers, and holds 16,384 tokens of context. You can start talking to it with no account. Osprey Lite is based on the most recent paid Osprey model.
Kestrel, the experimental model with fewer refusals
Kestrel is an experimental model with its restrictions lightened. It has been abliterated, a technique that removes much of the trained reflex to refuse, so it answers questions that a more cautious model turns away or buries in caveats.
That makes it useful where a blanket refusal gets in the way of legitimate work: a researcher studying how harmful content is written so it can be detected, a writer whose fiction goes to dark places, a security team that needs a frank answer about how an attack works, or anyone tired of a model hedging on a plain question.
Fewer refusals is not the same as no rules. Kestrel is still bound by the Carpathian Acceptable Use Policy at https://carpathian.ai/legal/aup, the same as every other model, and use that breaks it is not allowed. Because it is experimental, expect it to be less polished than Osprey or Phoenix, and check its answers before you rely on them.
Bluejay, for everyday work and automation
Bluejay is the budget model, built for everyday workloads and automation. It is the one to put behind a script, a scheduled job or a support queue, where the same kind of request runs over and over and the rate per token matters more than the last bit of reasoning.
Typical jobs: sorting incoming tickets by topic and urgency, pulling names, dates and totals out of forms and invoices, summarizing call notes, tagging records, writing a first draft of a reply for a person to check, or turning a day of activity into a short report. Because it reads images, it can work from a photo of a receipt or a screenshot as easily as from text. It thinks before it answers, holds 16,384 tokens of context, and comes with an AI plan.
Using the models in your own code
Every model is on the AI API, which follows the OpenAI chat completions format. Point an existing OpenAI SDK at the Carpathian base URL, pass a model id and a messages array, and set stream to true for server-sent events. A request to the models endpoint lists every model your key can call, so you can switch from Bluejay to Osprey by changing one string.
Token rates for each model are at https://carpathian.ai/pricing/ai-models, and every model has its own page at https://carpathian.ai/ai/models.
Picking one
Start on Osprey Lite if you want to try the chat for free, it covers most everyday questions on its own. Move to Bluejay when you are automating a task that runs at volume and the cost per request adds up. Use Osprey when the work is code, long writing or a problem with several moving parts. Bring in Phoenix for anything security related, and for the hardest code on your list. Try Kestrel when another model refuses a request you have a legitimate reason to make.
You do not have to pick one for good. You can run Bluejay on the routine work, keep Osprey open for the day's coding and writing, and send the security review to Phoenix, all on the same key.
wren, the research model
wren is the model we train ourselves, a 200-million-parameter model that reads raw bytes, runs on an ordinary CPU with no GPU, and learns new facts while it sleeps. It is a research model and it is often wrong, so it is not one to rely on for work. You can watch it think byte by byte, with no account, at https://carpathian.ai/veritate/chat, and read its model card at https://carpathian.ai/ai-models/wren.
Try them
Open a chat at https://carpathian.ai/chat and pick a model from the menu. To use them in your own code or move up to Osprey, Bluejay or Phoenix, create an account at https://carpathian.ai/signup.
Carpathian's AI Models and What Each One Does | Carpathain | Carpathian