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Introduction
This Cursor 3 review covers the most radical change to AI coding tools in years.
Cursor just launched version 3, codenamed “Glass,” on April 21, 2026. This is not a simple update. Instead, it completely reimagines what an AI coding tool should be. The traditional IDE takes a backseat. In its place, you get an agent control panel where multiple AI agents work simultaneously across different environments.
This post walks through every major feature in this Cursor 3 review. You will learn about the new Agents Window. Additionally, you will see how Cloud Handoff enables asynchronous development. Furthermore, you will understand why parallel agents are a game-changer. Finally, you will discover how Composer 2 performs against GPT-5.4.
For the big picture on all of Cursor’s recent announcements, see our pillar post on Cursor AI 2026 . Meanwhile, for details on the SpaceX deal, read our SpaceX Cursor acquisition breakdown .
The Agents Window: Goodbye Traditional IDE
The most striking change in this Cursor 3 review is the new interface.
The traditional file tree and editor tabs still exist. However, they are no longer the focus. The main workspace is now the Agents Window. This panel lets you run multiple AI agents at once. Each agent works independently on different tasks. Consequently, you can assign one agent to write tests. Another can refactor legacy code. Meanwhile, a third can review pull requests.
All agents work simultaneously. You monitor their progress from a single dashboard. When an agent finishes, it presents its work for your review. You can accept changes, request revisions, or discard the work entirely. This shift transforms the developer’s role from writing code to orchestrating agents.
Cloud Handoff: Work Never Stops
Another standout feature in this Cursor 3 review is Cloud Handoff.
Previously, AI agents only worked while your laptop was open and connected. Closing your computer meant stopping all progress. Cloud Handoff changes this entirely. You can move a running agent session from your local machine to the Cursor cloud with a single click. After that, the agent continues working on remote servers even after you close your laptop. Later, you pull the session back down for review.
This enables truly asynchronous development. Imagine starting a complex refactor before leaving the office. The agent works through the night. When you return in the morning, the changes are ready for review. No more waiting for long-running tasks to complete.
Parallel Agent Orchestration
The Cursor 3 review would be incomplete without discussing parallel agents.
Cursor 3 allows you to run multiple agents simultaneously across different environments. One agent might work on your local machine. Meanwhile, another runs in the cloud. A third connects to a remote SSH server. All report back to the same unified workspace.
This parallelization dramatically speeds up complex workflows. For example, you can run a full test suite while another agent fixes linting errors. At the same time, a third agent generates documentation. Previously, you would run these tasks sequentially. Now they happen all at once.
Composer 2: Performance That Competes
Under the hood, this Cursor 3 review must mention the new Composer 2 model.
Cursor’s in-house model now beats Anthropic’s Opus 4.6 on coding benchmarks. It also competes closely with OpenAI’s GPT-5.4. Most importantly, it achieves this at a 10 to 20 times lower cost. Output tokens cost just $7.50 per million, compared to $75 for GPT-5.4 Fast.
On Terminal-Bench 2.0, Composer 2 scores 61.7. That surpasses Opus 4.6’s 58.0 while trailing GPT-5.4’s 75.1. For many real-world tasks, the cost savings justify any performance gap.
The Controversy: Shadow Workspaces
No Cursor 3 review is complete without addressing the controversy.
Cursor 3 introduces Shadow Workspaces. This feature allows the AI agent to autonomously modify files and run terminal commands without explicit approval for each action. Some developers love the speed. Others worry about security and control. Cursor emphasizes that all changes are reversible and clearly tracked.
You can adjust the autonomy level in settings. Conservative users can require approval for every change. Power users can let agents run freely.
Pricing and Availability
Cursor 3 is available now. Existing Cursor users can upgrade for free. New users can sign up at cursor.com. The Pro plan includes unlimited agent runs and Cloud Handoff.
For a detailed comparison with Claude Code, see our Cursor vs Claude Code 2026 showdown .
Conclusion
This Cursor 3 review confirms that agentic coding has arrived.
The Agents Window shifts the developer’s role from writer to orchestrator. Cloud Handoff enables truly asynchronous workflows. Parallel agents accelerate complex tasks. Composer 2 delivers competitive performance at a fraction of the cost.
Cursor 3 is not just an upgrade. It is a reimagining of how developers will work with AI. If you write code for a living, you owe it to yourself to try it.
