Multi-Model AI Experience

Every mind
at your command

Claude, Gemini, GPT — the world's most powerful AI models,
unified in one timeless interface.

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The finest models
in conversation

We partner with the world's leading AI labs to bring you cutting-edge language models, always updated, always available.

Anthropic
Claude
v4.7 · Opus Series

Anthropic's most intelligent model yet. Exceptional at nuanced reasoning, long-context synthesis, and creative writing with a distinctive voice.

200K Context Reasoning Creative Code
Google DeepMind
Gemini
v3.1 · Ultra Series

Google's multimodal flagship. Native vision, audio, and code understanding at superhuman scale, with real-time search grounding.

Multimodal Web Search 1M Context Vision
OpenAI
GPT
o3 · Pro Series

OpenAI's frontier reasoning model. Chain-of-thought mastery for complex math, science, and multi-step logic problems.

Chain-of-Thought STEM Agentic Tools
DeepSeek
DeepSeek
R2 · Full Series

Open-weight excellence. Remarkable performance for code generation, algorithmic problem solving, and scientific analysis.

Open Weights Code Science Math
▸ You · Claude 4.7

Explain quantum entanglement
as if I'm a poet, not a physicist.

▸ Claude

Imagine two stars born from
the same collision of light —
one cast to the left edge
of the universe, one to the right.
They have never touched again,
yet when one trembles…
▸ Switch model → Gemini 3.1

▸ Gemini

Searching current research…

Here are 3 recent papers
on entanglement fidelity
from Nature Physics, 2025:

Crafted for those who
demand more

01

Seamless model switching

Move between Claude, Gemini, GPT, and DeepSeek mid-conversation. One thread, every intelligence.

02

Comparative reasoning

Ask the same question to multiple models simultaneously. See how each mind approaches the same problem differently.

03

Always latest versions

ChatKeeper tracks every model release. Claude 4.7, Gemini 3.1 — you're always speaking to the frontier.

04

Unified conversation history

All your conversations, across every model, in one elegant archive. Search, revisit, continue.

The right model for the right moment — that is the art of thinking with machines

— The ChatKeeper Philosophy
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Your first
conversation
awaits

No setup required. Choose your model and start thinking differently.

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