Cursor 3 'Glass': The $50 Billion Coding IDE That Replaces Typing With AI Agent Delegation

Anysphere's agent-first IDE raises at $50B. You delegate tasks to AI agents. You review. No more typing.

April 3, 2026 · 9 min read · By Connie

What Is Cursor 3 "Glass"?

Cursor 3 is a fundamental rethinking of what a coding IDE is. Previous versions of Cursor were essentially VS Code with AI autocomplete bolted on — powerful, but still centered on a developer typing. Cursor 3 flips that model: you type a goal in natural language, and agents do the work.

The new interface centers on a unified workspace with a single natural language prompt box. Instead of navigating files and writing functions, you describe what you want — "add authentication to the user profile page with OAuth support" — and one or multiple agents execute across your codebase. A sidebar panel lets you manage these agents concurrently: pause them, give new instructions, or review their work without breaking the flow of another agent running in parallel.

The goal, as Anysphere describes it, is to remove the IDE from the critical path. You become a reviewer and decision-maker, not a typist.

The Key New Features in Cursor 3

1. Multi-Agent Sidebar

The most significant UI change in Cursor 3 is the agent sidebar. You can run multiple agents simultaneously — each working on a different task, feature branch, or repository. Agents show their status (thinking, running tests, waiting for review) in real time. You can interrupt any agent, give it new context, or merge its work into main.

2. Multi-Repository Support

Cursor 3 adds native multi-repository support. An agent can now read from your backend repo, understand how it connects to your frontend, and make coordinated changes across both codebases in a single session. This was the number-one requested feature from enterprise teams building microservices architectures.

3. Cloud-Generate + Local-Review Workflow

Agent work runs in Anysphere's cloud by default (faster, no local GPU required), but generated code is reviewed locally in your editor before any changes are applied. This hybrid model means you get the speed of cloud compute with the privacy of local review — no code is committed without your approval.

4. Composer 2 — Anysphere's In-House Model

For the first time, Cursor ships with its own model: Composer 2, built on Moonshot AI's Kimi 2.5 with additional pre-training and post-training by Anysphere specifically for coding tasks. Composer 2 is the default model for agent tasks, though users can still switch to Claude Opus 4.6, GPT-5, or Gemini 3.1 Ultra for specific tasks.

Having an in-house model is a major strategic move. It means Anysphere controls its own inference costs, can fine-tune on coding data it collects (with user opt-in), and is no longer entirely dependent on Anthropic or OpenAI pricing decisions.

The $50 Billion Valuation: How Did Cursor Get Here?

Anysphere is raising a new funding round at a $50 billion valuation — nearly double its previous valuation. Total funding has surpassed $3 billion, with strategic investors including Nvidia and Google. For context, this puts Cursor's valuation above many publicly traded software companies.

The growth story is straightforward: Cursor grew from 0 to millions of paying developer users in under two years. Enterprise adoption accelerated in 2025 as teams replaced GitHub Copilot (which remains primarily autocomplete-focused) with Cursor's more capable agentic workflows.

Cursor 3 vs. Claude Code vs. GitHub Copilot vs. Windsurf

Who Should Switch to Cursor 3?

Switch if you:

• Work across multiple repositories simultaneously and want agents to coordinate changes
• Prefer a GUI over terminal-based tools like Claude Code
• Lead a team and want to delegate feature implementation to parallel agents while reviewing outputs
• Were already using Cursor 2 — this is a straightforward upgrade
• Want an all-in-one IDE that doesn't require switching between tools

Stick with your current tool if you:

• Live in the terminal and prefer Claude Code's deep repository understanding
• Are primarily doing autocomplete-heavy work where Copilot is sufficient
• Need the lowest possible monthly cost (GitHub Copilot at $10/mo is hard to beat)
• Work in a single codebase where multi-repo support isn't relevant

Availability and Pricing

Cursor 3 is rolling out on April 3, 2026 to all existing Cursor users first, with general availability expected within days. Pricing remains $20/month for the Hobby plan and $40/month for the Pro plan. Enterprise pricing is custom. Composer 2 is available by default on all paid plans; legacy models (Claude, GPT-5) remain accessible.

Frequently Asked Questions