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Alpha is a workbench for building software with an AI agent. You describe the result in the chat; the agent writes the code, runs it on the session’s own machine and shows it to you in a live Preview. When it looks right, Publish puts it on the internet at its own address.
The Harbor bookings session, with the sidebar collapsed to a menu button at the top left, then the title Harbor bookings and the Codex mark. The chat takes the left quarter. It ends with the agent's message that three choices will shape the plan, a card titled The agent has questions with a green check, listing three questions each answered Left to the agent — it went with In app only, Until class starts and Current browser, and a Proposed plan card titled Automatic class waitlist with a copy button and a chevron. The composer below shows the placeholder Describe what to plan…, then the + button, the model chip reading gpt-6.… · high and the plan chip reading p… · on on the left, and the microphone and a dimmed round send button on the right. The workspace fills the rest. Its tab strip reads Plan, Preview (in front), Shell, Database, Secrets, README.md and server.js, then the round + button, and at the right end the GitHub button, Share, the Publish pill and the files button. Under it, the Preview toolbar shows the Desktop, Tablet and Mobile icons, Back, Forward, Reload, the port pill reading node · 3000 and Logs, with Draw, Select and Open in new tab at the right. The frame shows the Harbor Sailing School app: the headline Good days start on the water., a sailboat photo with a round LESS LAND MORE SEA badge, This week's classes with a count of 3 and the date pill Oct 26 – Nov 1, 2026 · This week, the filters All classes, Beginner, Intermediate and All levels, and three class cards: Beginner Dinghy, Wednesday, Oct 28, 09:00 – 12:00, with Maya Chen; Intermediate Keelboat, Friday, Oct 30, 13:00 – 16:00, with Oliver Brooks; and Sunset Sail, Saturday, Oct 31, 16:30 – 18:30, with Sophie Laurent.

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Start here

Quickstart

Build and publish your first app in about ten minutes.

How Alpha works

Sessions, machines, the workspace and what keeps running.

Prompt Alpha well

What to say so the agent builds the right thing first time.

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What you can build

Apps

Booking apps, internal tools and stores with sign-in, a database and a public address.

Agents

Support bots, research teams and voice receptionists, tested with evals.

Decks and documents

Pitches, investor updates and one-pagers, exported to PowerPoint or PDF.

Images and video

Launch videos, logo concepts, product shots and diagrams.

Data

Financial models and budgets as Excel workbooks, or a dashboard from your data.

Automations

A morning digest or a weekly check, run on a timetable by a routine.

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Every session has its own machine

Each session runs on an isolated cloud machine where the agent installs packages, starts servers and runs commands without touching any other session. Turns run on Alpha’s servers, so work keeps going when you close the tab. After about 30 minutes away, an idle machine sleeps; opening the session wakes it with every file as you left it.

Chat

Codex or Claude Code works in the chat. Steer it mid-turn.

Workspace

Preview, files, Shell, Database and app sign-in beside the chat.

Ship

Publish to a live https address, then republish each change.

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Explore the docs

Guides

Five end-to-end builds, from a landing page to a weekly Slack summary.

Connect

Integrations, MCP servers, secrets and skills.

Agents and evals

Build AI agents, try them on real input and prove them with evals.

Reference

Slash commands, shortcuts, limits and troubleshooting.