The best AI on earth was built for programmers. You got a chat box.
Claude Code, Codex and Cursor research, draft, design and use a computer for you, as long as you are happy with repositories, config files and a terminal. Jack turns them into a teammate you just talk to.
Reconcile September's supplier invoices and chase the late ones.
- Claudethe analysis
- ChatGPTthe chart
- Cursorthe supplier portal
- Matched invoices to purchase ordersClaude
- Drew the late-payments chartChatGPT
- Filled in the supplier portalCursor
Maria wants to send 3 emails to suppliers.
Several AIs on one job is a paid plan.
Welcome to AI in 2026. Please read the setup guide.
- 01
The good stuff is for programmers.
Agents that do real work ship with install guides, config files and a command line. Everyone else gets a chat box and a copy button.
- 02
Every vendor says theirs does it all.
It doesn't. One draws, one reasons, one can actually use a computer. Each wants you to pick it, and only it.
- 03
Then the limit hits.
Halfway through the job the usage bar reads 100 %, while the other AI you pay for sits idle.
Jack, instead.
- 01MWhere do signed contracts live, and how do you name the folders?Contracts, one folder per supplier. Year first.MGot it. Anything I should never do without asking?
Hire a teammate.
Give it a name and a role. It interviews you about how you work, the standards you follow and where your documents live. No prompts to engineer.
- 02MI'll split this up and bring the answers back here.Helper chat: Match invoices to ordersClaudeHelper chat: Late-payments chartChatGPT
Hand it the job.
Jack gives each part of the job to the AI that does it best, and to the next one when that AI is out for the day. (Paid plans; Free runs on the one AI you choose.)
- 03
Maria wants to delete 3 files in Contracts.
ApproveDenyUndo rewindRewound to 10:43Chat and files are back as they were.Keep the decisions.
Risky actions wait for your approval. Something went wrong? Rewind the chat, files included.
No AI is best at everything. Jack stopped pretending.
Images and design
Visuals, layouts and anything that has to look right.
ChatGPT, with GPT Image 2.5
Using a computer
Browsing, forms, clicking through apps.
Cursor
Thinking and engineering
Analysis, long documents, hard problems.
Claude
Your company's own models
Models your company runs or approves.
OpenCode with your API keys
This line-up changes every few months. Your teammate keeps up, so you don't have to. Using more than one AI is a paid plan.
Your coworkers don't ask you for a system prompt.
New to AI, chatting with it daily, running agents or building with them: Jack asks once and adjusts every screen and every explanation to you. The safety warnings stay the same for everyone.
- New to AI
Maria wants to delete 3 files in Contracts. Is that OK?
- Chats with AI
Maria wants to delete 3 files in Contracts.
- Uses agents
Delete 3 files in /Contracts: allow?
- Builds with AI
rm 3 files in Contracts/: allow / deny
Work, not code.
Administration
- Invoice and purchase-order reconciliation
- Monthly reports from scattered spreadsheets
- Procurement and supplier follow-up
Engineering and industry
- Specifications, calculations and technical documentation
- Checking drawings and data against standards
- Compliance evidence and change records
For IT
- Your API keys and gateways
- Company rules agents cannot skip, enforced as hard limits
- One place to allow, fund and audit every agent
Jack builds no AI of its own.
It works with the ones you already pay for, and lets you switch the day a better one ships.
- It runs on your own logins and keys.
- Every step can be rewound, files included.
FAQ
Do I need to know how to code or use a terminal?
No. That is the point.
Do I need several AI subscriptions?
No. Free runs on the one you choose. Add more when you want each job on the AI that does it best.
Does Jack combine my usage limits?
No. Each AI runs under your own login and within its own limits, exactly as its vendor sells it. Jack decides which one takes the next job; it never shares or pools accounts.
Which AIs does it work with?
Claude, ChatGPT, Cursor, GitHub Copilot and OpenCode.
What does it cost?
Free with one AI of your choice. Paid plans add more AIs, the web app, remote access, and team and company features. Prices are announced before launch.