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ChatGPT is built for anything. ZeroTwo is built for everything.
TL;DR: Chat with AI on ZeroTwo to talk to every frontier model — GPT-5, Claude 4.5 Sonnet, Gemini 2.5 Pro, Grok 4, Llama 4, Mistral Large, DeepSeek R1 — in one thread. No model is best at every task; switching between them is the win. Free tier — no credit card. Image generation, deep research, and a coding canvas are built into the same chat.

One roof

Every frontier AI you'd want to chat with.

We add new models the week they launch. As of April 2026, the ZeroTwo workspace runs every model below — and 50+ more — under a single subscription.

GPT-5

OpenAI

Claude 4.5 Sonnet

Anthropic

Gemini 2.5 Pro

Google

Grok 4

xAI

Perplexity

Perplexity

DeepSeek R1

DeepSeek

Llama 4

Meta · Groq

Mistral Large

Mistral

Qwen 3

Alibaba

Kimi K2

Moonshot

Cohere Command

Cohere

Liquid LFM

Liquid AI

See every model you'll unlock on the models page, or pick the best one for coding, writing, and research — all included on ZeroTwo Pro.

Why multi-model

No single AI is best at everything you'll chat about.

The 2024 edition of the Stanford AI Index Report documented that the gap between the top frontier models has narrowed to within a few percentage points on most public benchmarks — but the per-task winners change every quarter. By early 2026, Claude 4.5 Sonnet leads code-refactor evaluations, GPT-5 leads multi-step reasoning, Gemini 2.5 Pro leads long-context document analysis, and Grok 4 leads real-time cultural and market context.

This is why locking yourself into a single product is a quiet tax on your output. McKinsey's 2024 State of AI reported that 65% of organizations were using generative AI regularly — nearly double the prior year — and the highest-output teams used three or more different frontier models in a typical week (source). They didn't pick a winner; they picked the right model per task.

ZeroTwo collapses that workflow into a single thread. You can ask GPT-5 to reason through a math problem, hand the result to Claude 4.5 Sonnet to write the explanation, and pipe the final draft to Gemini 2.5 Pro to fact-check against a 200-page reference PDF — all without leaving the conversation, copying prompts, or paying five separate bills. This is what we mean when we say AI chat should be multi-model by default.

"I keep five model tabs open at all times. Different models are good at different things — being able to pick is the actual superpower of using AI in 2025."
— Ethan Mollick, Wharton, author of Co-Intelligence

Reuters reported in late 2025 that ChatGPT reached 800 million weekly active users. The category isn't going anywhere — but the question users are now asking has shifted from "should I chat with AI?" to "which AI should I chat with for this task?" That second question is what ZeroTwo is built around.

Cheat sheet

Best AI to chat with — per task.

A pragmatic guide based on public benchmarks, leaderboards, and our own usage telemetry across millions of ZeroTwo conversations in 2026.

Long-form writing

Claude 4.5 Sonnet

Holds voice across 10K+ tokens.

Coding & refactors

Claude 4.5 / GPT-5

Whole-file edits, fewer regressions.

Live web research

Gemini 2.5 / Perplexity

Real-time citations.

Image generation

GPT Image / FLUX Pro

Best prompt adherence in 2026.

Math & reasoning

GPT-5 / DeepSeek R1

Top AIME / GPQA scores.

Real-time / culture

Grok 4

Live X + web context.

Try every model free — switch mid-thread, keep your context.

GPT-5, Claude 4.5 Sonnet, Gemini 2.5 Pro, Grok 4 — one login, no card.

Try free

What people chat about

Eight things you can do in the next five minutes.

  1. →

    Draft a 1,200-word essay in your voice

    Claude 4.5 Sonnet

  2. →

    Refactor a tangled React component

    Claude 4.5 / GPT-5

  3. →

    Summarize a 200-page contract

    Gemini 2.5 Pro

  4. →

    Generate 4 product hero images

    GPT Image / FLUX Pro

  5. →

    Run deep research on a market

    Gemini + Perplexity

  6. →

    Get a real-time read on the markets

    Grok 4

  7. →

    Tutor yourself through linear algebra

    GPT-5 / DeepSeek R1

  8. →

    Translate a 20-page deck into 5 languages

    Claude 4.5 Sonnet

See more use cases on ZeroTwo or skip the ChatGPT-only tax — switch to multi-model chat.

Frequently asked

Questions about chatting with AI.

Key takeaways

  • Chatting with AI in 2026 means switching between frontier models — no single model is best at every task.
  • ZeroTwo lets you chat with GPT-5, Claude 4.5 Sonnet, Gemini 2.5 Pro, Grok 4, Llama, Mistral, and DeepSeek under one login.
  • Switch between models mid-thread without losing context, files, or history.
  • Image generation, deep research agents, and the coding canvas are built into the same chat — not bolted on.
  • Free tier needs no credit card. Pro adds unlimited messages, images, files, and 60+ models.

Published January 15, 2026 · Updated April 24, 2026 · Reviewed by ZeroTwo Editorial

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One login. Every frontier AI in a single thread. Free tier — no credit card.