One App.Every AI Model.
Chat with GPT-4, Claude, Gemini, DeepSeek, Grok and Qwen — all in one place. Compare answers side-by-side and find the best response every time.
Powered by the world's best AI models
Everything you need from AI,
in one app
No more switching between apps. Cortex brings every major AI model together with powerful features built on top.
Multi-Model Chat
Chat with GPT-4, Claude, Gemini, DeepSeek, Grok and Qwen. Switch models mid-conversation with a single tap.
Side-by-Side Compare
Send the same prompt to two models at once and pick the winner. Find the best answer every time.
Web Search
Get real-time answers backed by live web data. Powered natively by OpenAI, Gemini, and Qwen search integrations.
Smart Memory
Cortex remembers your preferences and context across conversations. Your AI gets smarter the more you chat.
Voice Input
Speak your prompts with built-in speech-to-text. Fast, accurate, and supports continuous dictation.
File Attachments
Upload images and PDFs directly into the chat. AI reads and analyzes your documents with full context.
Prompt Library
100+ ready-to-use templates for coding, writing, translation, analysis, and more. Fill in the blanks and go.
Tone Customization
Adjust style, friendliness, and enthusiasm. Make AI professional, casual, academic or creative — your call.
20 Languages
Fully translated interface in 20 languages including English, Turkish, Japanese, Korean, Arabic, and more.
Don't guess.
Compare and decide.
Send the same question to two models simultaneously. Watch both stream in real-time, then pick the answer you like best.
- Parallel streaming responses
- Any two models, side by side
- Pick the winner to keep
- Vote and track preferences
Start chatting in seconds
No accounts, no API keys, no setup. Just download and go.
Choose Your Model
Pick from GPT-4, Claude, Gemini, DeepSeek, Grok, or Qwen. Or try compare mode to test two at once.
Ask Anything
Type, speak, or upload a file. Enable web search for real-time data. Use prompt templates for quick starts.
Get Smarter Over Time
Cortex learns your preferences with Smart Memory, organizes chats in projects, and adapts its tone to you.
Questions, answered
What is Cortex AI?
Cortex AI is a chat app for iPhone and Android that brings GPT-4, Claude, Gemini, DeepSeek, Grok and Qwen together in one place. Switch models mid-conversation, compare two answers side by side, search the web, attach files and speak your prompts.
Do I need my own API keys?
No. There are no API keys to manage and nothing to configure. Download the app, pick a model and start chatting.
How does model comparison work?
Send the same prompt to two models at once. Both answers stream in parallel, you keep the one you prefer, and your votes help you track which models you like best.
How much does Cortex AI cost?
Cortex AI is free to get started. Optional auto-renewing subscriptions with weekly, monthly or yearly billing and one-time credit packages are available through the App Store and Google Play, where you can also manage or cancel your subscription.
What happens to my conversations?
Your prompts and attached files are sent to the AI provider you choose so it can answer. Your data is stored on secure servers, you can delete individual conversations in the app, and you can ask us to delete all of your data at info@odbs.tech.
Ready to try every AI?
Download Cortex and start chatting with the world's best AI models today. Free to get started.