Cursor 3 vs Google Antigravity: Which is the Best IDE with AI in 2026

The first quarter of 2026 redefined the AI ​​development tools market. Cursor released version 3 with Background Agents. Google responded with Antigravity, a completely free agent-first IDE. And in the midst of this, Claude Code has established itself as the most powerful CLI alternative on the market.

If you are a developer, a marketer who creates landing pages, or anyone who uses code on a daily basis, the question is inevitable:which of these tools is worth your time and money in 2026?

In this article, we will compare Cursor 3, Google Antigravity, Claude Code and GitHub Copilot with concrete data: price, features, benchmarks, usage experience and who each one is best for.

1. The AI ​​IDE Market in 2026: How We Got Here

To understand the importance of the current moment, it is worth quickly recapping how the market has evolved.

2021-2023: the era of autocomplete

GitHub Copilot launched the category in 2021. The proposal was simple: an intelligent autocomplete that suggested lines of code as you typed. It was revolutionary for the time, but limited -- Copilot completed code, not solved problems.

2024: the era of integrated chat

In 2024, Cursor (still in version 1.x) and Copilot Chat changed the conversation. Now you could have a chat window inside the IDE, ask for explanations about code, request refactorings and even ask to create entire functions. Cursor differentiated itself by offering superior context control -- you could select specific files for the model to "understand" before responding.

2025: the age of agents

The concept of "agents" has invaded SDIs. Instead of just answering questions or completing code, the tools started to perform autonomous tasks: creating files, running tests, fixing bugs in a loop, making deployments. Cursor 2.x introduced Agent Mode, and Claude Code (officially released in 2025) took this concept to the extreme on the terminal.

2026: the era of fierce competition

And where we are now. Cursor released version 3 with Background Agents. Google launched Antigravity as a direct response. Anthropic continues to evolve the Claude Code. And GitHub expanded Copilot with Copilot Workspace. The result is that, for the first time, developers havefour serious optionsto choose from -- and each with a different philosophy.

2. Cursor 3: what changed with Background Agents

Cursor was already the most popular AI-powered IDE among advanced developers. Version 3, released in the first quarter of 2026, added the most anticipated feature:Background Agents.

What are Background Agents

Background Agents are AI agents that run in the background, performing complex tasks while you continue working. In previous versions, when you asked Cursor to do something complex (refactor a module, create tests for 20 functions, migrate an API), you had to wait for the AI ​​to finish before continuing. With Background Agents, the task runs in tollel.

In practice, it works like this:

1. You describe a complex task in Cursor chat (e.g. "refactor the entire authentication module to use JWT instead of sessions")
2. Cursor launches a dedicated Background Agent for this task
3. You continue editing other files normally
4. The agent works in the background: reads files, makes changes, runs tests
5. When finished, you receive a notification to review the changes
6. Do you accept, reject or ask for adjustments

This is transformative because it eliminates the “dead time” of waiting for AI. On large projects, refactoring tasks can take 10-30 minutes. With Background Agents, this time is recovered.

Other new features of Cursor 3

• Enhanced multi-model support:switch between Claude, GPT-4o, Gemini and local models with one click, during the same session
• Improved project context:Cursor 3 indexes the entire project more efficiently, allowing the model to understand complex dependencies between files
• AI-integrated terminal:the terminal within Cursor now has command suggestions based on the project context
• Bug loop detection:when the agent creates a bug trying to fix another, Cursor 3 detects the loop and suggests an alternative approach instead of continuing to try
• Memory between sessions:Cursor now remembers design decisions between sessions, without having to re-explain architecture and patterns every time

Price

Cursor 3 maintains the pricing structure of Cursor 2:

• Free:basic features, 2,000 completions per month
• Pro ($20/month):unlimited use of completions, access to all models, Background Agents
• Business ($40/month per user):everything from Pro + enterprise controls, SSO, audit logs

Background Agents are only available on Pro and Business plans. The Free plan does not include this feature.

3. Google Antigravity: the agent-first IDE that arrived free

Google Antigravity and the surprise of 2026. Announced and released in the first quarter, and a completely new IDE, built from scratch with a philosophyagent-first. It is not a fork of VS Code. It is not a plugin. And a new IDE that puts AI agents at the center of it all.

What does "agent-first" mean?

In traditional IDEs (including Cursor and VS Code with Copilot), AI is an add-on to the editor. You write code and AI helps. In Antigravity, the logic is reversed: you describe what you want and the agent writes the code. You are the reviewer, not the writer.

This doesn't mean you can't write code manually -- you can. But the standard experience is agent-oriented: you define tasks in natural language, the agent executes it, and you review it.

SWE-bench: 76.2%

Antigravity's most impressive number is its score on SWE-bench, the standard benchmark for evaluating AI software engineering tools. With76.2% resolution, Antigravity set a new record at the time of release.

For context:

• SWE-bench evaluates a tool's ability to resolve real issues from open source projects on GitHub
• A score of 76.2% means that the agent correctly resolved more than three quarters of the problems presented, without human intervention
• In 2024, the best scores were around 40-50%. The jump to 76.2% represents an advance of almost two generations in one year

Main features

• Multi-step agents:Antigravity does not solve problems with a single call to the model. It decomposes tasks into steps, executes each one, validates the result and adjusts as necessary
• Native integration with Google Cloud:deploy, monitoring and logging directly from the IDE, without configuration
• Gemini as a base model:uses Google's Gemini templates, optimized for code
• Execution sandbox:the agent can run code in a secure sandbox to test before applying changes to the real project
• Real-time collaboration:Multiple developers can work on the same project with shared agents

Price: free

Google launched Antigravity asfree product. No limited free plan, no 14-day trial. Free, with all features. The strategy is clear: Google wants to capture market share quickly and monetize through the Google Cloud ecosystem (developers using Antigravity tend to deploy to Google Cloud).

For individual developers, this is a difficult proposition to refuse. The question is: what do you lose in relation to the paid Cursor?

4. Direct comparison: Cursor 3 vs Antigravity

Let's get to the point: how the two IDEs compare head to head on the criteria that matter most to developers.

Editor's experience

Cursor is based on VS Code. If you use VS Code today, moving to Cursor is almost seamless -- your extensions, themes, and keybindings work. This is a huge advantage because VS Code has the largest ecosystem of extensions on the market.

Antigravity is a new IDE with its own interface. It is modern and well designed, but it is not compatible with VS Code extensions. You lose access to thousands of extensions that you probably use on a daily basis. For some developers, this is a deal-breaker. For others who rely less on extensions, it is irrelevant.

Quality of code suggestions

Cursor 3 allows you to choose between multiple models (Claude Sonnet, Claude Opus, GPT-4o, Gemini). This means you can use the best model for each task. For quick tasks, Sonnet. For complex refactorings, Opus. This flexibility is a real competitive advantage.

Antigravity exclusively uses Gemini models. The quality is excellent (the 76.2% SWE-bench score proves this), but you have no option to change the model. If Gemini has a blind spot in some language or framework, you have no alternative within the tool.

Agents and automation

Here the competition is fierce. Cursor 3's Background Agents are excellent for tollel tasks -- you can have multiple agents working on different parts of the project simultaneously. The advantage and maturity: Cursor has been refining its agent system since 2025.

Antigravity was built with agents as its central concept. Its multi-agent architecture is more sophisticated in theory: specialized agents for different tasks (one for testing, another for refactoring, another for documentation) that communicate with each other. In practice, execution is still inconsistent in complex projects, but the potential is enormous.

Performance

Cursor, being based on Electron (VS Code framework), inherits the same memory consumption problems. On large projects, it can get heavy. Cursor 3 has improved on this, but it's still a point of concern.

Antigravity was built with more modern technologies and, in initial tests, shows better performance in large projects. It starts faster and consumes less memory. However, as it is a new product, performance bugs still appear with some frequency.

Ecosystem and integration

Cursor integrates with Git, GitHub, GitLab, Bitbucket and virtually any service that works with VS Code. The integration is mature and reliable.

Antigravity natively integrates with Google Cloud, Firebase, Cloud Run and other Google services. For those who use the Google ecosystem, it's perfect. For those using AWS or Azure, the integrations exist but are less polished.

5. Claude Code as a CLI alternative ($20/month)

While Cursor and Antigravity compete for the visual IDE market, Claude Code occupies a different space: thecommand line. It's not an IDE -- it's a terminal tool that uses AI to read, edit, and create files, run commands, and interact with projects.

Why Claude Code deserves to be in this comparison

Because many developers use Claude Code as a replacement or complement to an AI-powered IDE. The profile is typically:

• Developers who prefer the terminal to the visual editor
• Professionals working on remote servers where visual IDEs are not practical
• People who want AI for tasks beyond code: system automation, file management, DevOps scripts
• Marketers and content creators who don't need a full code editor

Advantages of Claude Code

• Context of 1 million tokens:Claude Code can "read" entire projects at once. AI-powered IDEs often limit context to a few files at a time
• System access:can run any operating system command -- git, npm, docker, costm scripts. IDEs limit interaction to the editor
• Extensible with skills:skills are specialized instructions that transform Claude Code into an expert in any domain. No IDE offers anything equivalent
• Lightness:runs in the terminal. No Electron, no heavy interface. Works perfectly on modest machines and slow connections
• Price:US$20/mes com o plano Claude Pro, que inclui uso generoso. O plano Max (US$100-200/mes) oferece uso praticamente ilimitado

Limitations of the Claude Code

• No visual interface:There is no interactive syntax highlighting, visual file tree or side-by-side diff in the style of an IDE
• Learning curve:If you've never used a terminal, Claude Code has an entry barrier. Visual IDEs are more intuitive for beginners
• Without real-time autocomplete:Claude Code works on request (you ask, he does it). No inline suggestions while you type like Cursor or Copilot

Claude Code + IDE: the most powerful combination

A pattern that is becoming common among advanced developers is to useClaude Code + an IDE with AI simultaneously. Claude Code takes care of infrastructure tasks, automation and operations involving the system (git, deploys, scripts, migrations). The IDE takes care of active code writing with autocomplete and inline suggestions.

This combination eliminates the weaknesses of each tool. Claude Code compensates for the lack of access to the IDE system. The IDE makes up for Claude Code's lack of a visual interface.

6. Comparison table: Cursor 3 vs Antigravity vs Claude Code vs Copilot

The table below summarizes all the tools in the criteria that matter most. Use it as a quick reference for your decision.

Criterion	Cursor 3	Google Antigravity	Claude Code	GitHub Copilot
Tipo	visual IDE	visual IDE	CLI (terminal)	Plugin for IDE
Base	VS Code fork	own IDE	Native terminal	VS Code Extension
Price/month	US$20 (Pro)	Free	US$20 (Claude Pro)	US$10 (Individual)
AI Models	Claude, GPT-4o, Gemini	Gemini (exclusive)	Claude (Sonnet, Opus, Haiku)	GPT-4o, Claude
Multi-model	Sim	Nao	Yes (between Claude models)	Yes (limited)
Background Agents	Sim	Yes (native)	No (sequential)	Nao
Maximum context	Variable by model	1M+ (Gemini)	1M tokens	Variable by model
System access	Limited (integrated terminal)	Sandbox	Total	Nao
VS Code Extensions	Compatible	Not compatible	N/A	Compatible
SWE-bench	~68% (estimated)	76.2%	~72% (with Opus)	~55% (estimated)
Skills/costmization	Rules (.cursorrules)	Agent Settings	Skills (SKILL.md)	Customized instructions
Best for	Devs using VS Code	New projects, Google ecosystem	Terminal-first, automation	Fast autocomplete
Maturity	High (years of development)	Low (new product)	Medium-high	Alta

7. Which is best for each developer profile

There is no universal "best tool". There is the best tool for your context. We will map concrete profiles with practical recommendations.

Frontend developer (React, Next.js, Vue)

Recommendation: Cursor 3.Compatibility with VS Code extensions is crucial for frontend. Extensions like ESLint, Prettier, Tailwind CSS IntelliSense and design system tools are part of the workflow. Cursor 3 preserves all of this and adds powerful AI. Background Agents are useful for component refactorings and migration between framework versions.

Backend developer (Python, Go, Rust)

Recommendation: Claude Code + Cursor 3.Backend involves a lot of terminal work -- deploys, Docker, databases, migrations, scripts. Claude Code shines in this context. Use Cursor for active code writing and Claude Code for everything involving infrastructure and automation.

Beginner full-stack developer

Recommendation: Google Antigravity.It's free, it has a modern interface and the agent-first approach is ideal for those who are learning. Instead of writing code and not understanding the errors, you describe what you want, the agent writes it, and you learn by reviewing it. Zero cost removes the financial barrier.

DevOps/SRE

Recommendation: Claude Code.Undoubtedly. DevOps lives in the terminal. Claude Code can read logs, create automation scripts, configureCI/CD, analyze metrics, and interact with any command-line tool. No visual IDE competes with Claude Code in this scenario.

Marketer creating landing pages

Recommendation: Claude Code.If you are not a developer and want to create web pages, configure tracking and generate copy, Claude Code with marketing skills is the most direct option. You describe what you want in natural language and it creates it. You don't need to understand the interface of a complex IDE.

Development team (company)

Recommendation: Cursor 3 Business + Claude Code.Cursor Business has enterprise controls (SSO, audit logs, policies) that Antigravity does not yet offer. Claude Code complements shared automations and scripts. Copilot is also a solid option for teams already in the GitHub Enterprise ecosystem.

Student or hobbyist

Recommendation: Google Antigravity + Copilot Free.Both are free. Antigravity for new projects and experimentation with agents. Copilot Free for basic autocomplete in VS Code. When you feel like you need more, switch to Cursor Pro or Claude Code.

8. The future of AI-enabled IDEs: where we are headed

Looking at the movements of 2026, some trends are clear about the near future of AI development tools.

Agents will become the standard

The fact that both Cursor 3 and Antigravity have invested heavily in agents indicates that simple autocomplete is becoming a commodity. In 12-18 months, every relevant SDI will have some form of autonomous agent. The difference will be in the quality and reliability of these agents.

Multi-agent will be the next battlefield

Today, most tools use a single agent per task. The next evolution is to have multiple specialized agents working in tollel: one writing code, another writing tests, another doing reviews, another monitoring performance. Antigravity has already signaled this direction with its agent-first architecture.

Price will converge downwards (or free)

The free release of Antigravity put enormous pressure on market prices. Cursor may be forced to reduce prices or expand the free plan. Copilot already has a Free version. The trend is for AI in IDEs to become a basic feature included in the price of the IDE (or free), with premium differentiations in advanced agent capabilities and business integration.

CLI and IDE will converge

Claude Code showed that terminal development with AI is extremely productive. IDEs are adding more terminal capabilities. Eventually, the distinction between "visual IDE" and "AI-powered CLI" will dissolve -- we will have hybrid tools that work both visually and in the terminal, with agents in both modes.

Skills and costmization will be differentiators

With the quality of the base models becoming similar, the next differentiator is thecostmization. Skills (specialized instructions), design rules, and personalized context will setote the average developer from the developer who uses AI professionally. Anyone who invests in configuring their tools correctly will have a disproportionate advantage.

This is why investing in skills today is a strategic decision: you are building a knowledge system that works on any tool (Claude Code, Cursor, or the next IDE that comes along), not betting on a specific platform.