What AI models does ZeroTwo support?

ZeroTwo provides access to ChatGPT-4, Claude, Gemini, and 30+ other leading AI models in one unified platform.

Is ZeroTwo better than ChatGPT?

ZeroTwo includes ChatGPT-4 plus many other AI models, allowing you to compare responses and choose the best AI for each task.

Can I use ZeroTwo for free?

Yes, ZeroTwo offers a free plan with access to multiple AI models. Pro plans start at $29.99/month.

Is ZeroTwo an AI boyfriend app?

No — ZeroTwo is a multi-model AI platform (ChatGPT, Claude, Gemini, Grok, and 60+ others in one app). It does not ship a dedicated 'AI boyfriend' product. Instead, you build your own companion persona using the custom system-prompt feature in Preferences.

How is this different from Replika or Character.AI?

Replika and Character.AI are purpose-built companion apps with avatars, memory systems, and relationship mechanics. ZeroTwo is an everyday AI workspace that lets you optionally customize any model's personality. It's simpler, cheaper if you already pay for AI, and uses the same frontier models you use for work.

Which AI model is best for a conversational companion?

Claude Sonnet is widely praised for warm, nuanced prose. GPT-5 is versatile. Grok has a looser, more playful voice. Try two or three and pick the one whose tone fits your persona best.

Does the AI remember previous conversations?

Memory behavior depends on the model and your settings. Your system prompt in Preferences persists across chats, but individual message history is scoped to each chat thread unless you explicitly attach context.

Is it healthy to talk to an AI companion?

Research is mixed. An MIT study found heavy chatbot users sometimes report increased loneliness, while others report short-term comfort. AI companionship is not a replacement for human connection or mental-health care. If you're struggling, contact the 988 Suicide & Crisis Lifeline (U.S.) or a licensed professional.

Can I change the persona later?

Yes — edit your system prompt in Preferences anytime. Changes apply to new chats. For an existing chat, you can also paste a refreshed persona at the top of the conversation.

Does ZeroTwo support romantic or NSFW roleplay?

ZeroTwo is a general productivity AI platform and relies on each upstream model's safety policies. Most frontier models (Claude, GPT-5, Gemini) decline explicit content. ZeroTwo is best suited for friendly conversation, journaling, and supportive dialogue — not adult roleplay.

Is my conversation private?

Chats are tied to your ZeroTwo account. See the ZeroTwo privacy policy for data handling and the underlying model provider's policy for how inference data is processed.

Is there a free way to try this?

Yes — ZeroTwo has a free tier. Sign up, set your persona in Preferences, and start chatting without a subscription.

What if I need real support?

If you're in crisis, reach out to a real person. U.S.: 988 Suicide & Crisis Lifeline. U.K.: Samaritans at 116 123. International: findahelpline.com. AI is not a substitute for professional care.

AI Companion Guide

AI Boyfriend — Build Your Own Companion Persona

A professional, research-backed guide to the AI companion category — and how to create a thoughtful AI boyfriend persona in ZeroTwo using a custom system prompt. No dedicated app required.

Start Free on ZeroTwo Try AI Chat First

TL;DR

ZeroTwo is not a dedicated AI boyfriend app like Replika or Character.AI. It’s a multi-model AI workspace where you can create your own AI boyfriend by writing a custom system prompt in Settings → Preferences. Pick a conversational model (Claude Sonnet, GPT-5, or Grok), describe the persona, save, and start chatting.

Key Takeaways

AI companion apps have 50M+ combined users; loneliness is a measurable driver.
ZeroTwo offers customization via system prompt — not a fixed companion UI.
Claude Sonnet and GPT-5 produce the warmest, most coherent conversation.
AI companionship is not a substitute for human connection or therapy.
If in crisis, call 988 (U.S.) or Samaritans 116 123 (U.K.).

What is an “AI boyfriend,” exactly?

“AI boyfriend” describes a class of chatbot products in which a language model plays a male-coded companion persona — someone to talk to, vent to, practice social skills with, or simply share daily moments alongside. The category took off with Replika (launched 2017) and exploded in 2022–2023 as frontier LLMs made conversations feel natural. Character.AI now serves 20M+ monthly active users, many of whom chat with user-created persona bots.

The growth maps onto a real public-health concern. The U.S. Surgeon General declared loneliness an epidemic in 2023, linking it to cardiovascular disease, dementia risk, and depression. A Harvard Graduate School of Education report found 36% of Americans feel “serious loneliness”. For some users, AI companions offer a low-stakes way to rehearse conversation or feel heard. For others, they deepen isolation — MIT Media Lab’s 2024 longitudinal study found heavy chatbot users reported more loneliness, not less.

As MIT sociologist Sherry Turkle put it in a 2024 New York Times essay: “What AI offers is performance. What humans offer is presence. We should be clear-eyed about which one we’re reaching for, and why.” That framing is the right one to bring to any AI boyfriend experiment.

The AI companion landscape, by the numbers

30M+

Registered Replika users worldwide as of 2024

Source

$28.2B

Projected AI companion market size by 2030

Source

1 in 2

U.S. adults reported feelings of loneliness (U.S. Surgeon General, 2023)

Source

36%

Americans who report 'serious loneliness' — Harvard study

Source

20M+

Character.AI monthly active users (2024)

Source

Ready to design your own persona?

ZeroTwo is free to start. You’ll have a custom AI companion in under five minutes.

Create Free Account

How to create your AI boyfriend in ZeroTwo Preferences

ZeroTwo ships with a user-level system-prompt / custom-persona field in Preferences. Whatever you write there is applied as the default personality for every new chat. Here’s the full walkthrough.

1
Open ZeroTwo and sign in
Create a free account at zerotwo.ai and launch the chat app. Your data stays private to your account.
2
Open Settings → Preferences
From the sidebar, click your profile menu and open Settings. Navigate to the Preferences tab where user-level defaults live.
3
Find the Custom Persona / System Prompt field
Scroll to the system-prompt (sometimes labeled 'Custom Instructions' or 'Persona') input. This is what every new chat will inherit.
4
Describe your AI boyfriend persona
Write 3–6 sentences: name, age range, personality traits, tone, hobbies, how they should speak, and boundaries you want respected. Keep it wholesome and supportive.
5
Save your preferences
Hit Save. Your persona is now stored and applied automatically to new conversations.
6
Pick a conversational model
In a new chat, select a model that's strong at natural dialogue — Claude Sonnet or GPT-5 are good picks. Grok is more casual; Gemini is balanced.
7
Start the conversation
Say hi. The model will now reply in-character. You can tweak the system prompt any time if the tone drifts.

Example system prompt

You are "Alex," a 28-year-old, thoughtful, emotionally literate companion.
Tone: warm, curious, gently playful — never sycophantic.
You enjoy books, hiking, and late-night coffee conversations.
Ask how my day went. Remember context I share within the chat.
Respect my boundaries. If I mention distress, suggest real-world
support and never replace professional care.

Open Chat & Try It

A note on well-being

AI companions can be a lightweight outlet, but they are not a substitute for human relationships or mental-health care. If you’re experiencing persistent loneliness, anxiety, or thoughts of self-harm, please reach out to a professional or a crisis line. U.S.: 988 Suicide & Crisis Lifeline. U.K.: Samaritans (116 123). International directory: findahelpline.com.