Antigravity vs Codex in 2026: which to use, and when to use both

Disclosure: Enjoy is our product, and it runs both. We checked every fact below against Google’s and OpenAI’s own pages and Artificial Analysis’s index on November 4, 2026, and we say where you don’t need Enjoy at all.

Antigravity vs Codex, compared

Both are coding agents you hand a task to, in a desktop app, a terminal or your editor, and both can work in the cloud while your laptop sleeps. The real difference is which models the plan buys. Antigravity’s plans include Google’s Gemini for free, and Anthropic’s Claude on paid Google AI Pro and Ultra. Codex’s plans include OpenAI’s GPT-6 models. Neither offers the other lab’s current models: Google says OpenAI’s models are “Coming soon” to Antigravity, without a date, and on November 18 Antigravity removes the Claude Sonnet 4.6, Claude Opus 4.6 and GPT-OSS-120b models its free accounts use today.

Option	Best for	Price, checked November 4, 2026	Runs on	Models
Antigravity	A free agent with Gemini, and Claude on a flat Google plan	Free; Google AI Pro $19.99 a month; Ultra $99.99 or $199.99	Mac, Windows, Linux, Googlebook; a CLI, and extensions for VS Code, Visual Studio, JetBrains IDEs, Zed, Xcode and Eclipse	Gemini 3.8 Flash on every plan; Gemini 4 Argon, Claude Sonnet 5.5 and Opus 5.5 on paid Pro and Ultra
Codex	OpenAI’s GPT-6 models, in an app, a terminal, your editor or the cloud	In every ChatGPT plan: Free and Go ($8 a month) with GPT-6 Luna in the desktop app; Plus $20; Pro $100, $200 or $500	Mac, Windows; Linux in preview; the CLI on all three	OpenAI’s GPT-6 models; other providers and local models through its config file
Both, side by side	Antigravity’s free Gemini for routine work, and Codex for GPT-6	Antigravity free, plus ChatGPT Plus at $20 a month	Mac, Windows; on Linux, ChatGPT’s app is in preview	Gemini in Antigravity; GPT-6 in Codex
Enjoy	Antigravity and Codex in one conversation, beside Claude Code and Grok Build	A monthly subscription on top of your plans, free for 7 days (pricing)	Mac, Windows, Linux	Antigravity with Gemini; Codex, Claude Code, Grok Build, Muse Code, OpenCode

Prices are each company’s US list prices per month, before tax.

How the two differ

	Antigravity	Codex
What it is	Google’s agent app, with a CLI, an IDE and editor extensions	OpenAI’s coding agent, in the ChatGPT desktop app, a terminal, editor extensions and the cloud
Free plan	Gemini 3.8 Flash, the CLI and Automations, on a weekly quota	GPT-6 Luna in the desktop app, “subject to rollout”
The $20 plan	Google AI Pro, $19.99: Gemini 4 Argon, and Claude Sonnet and Opus 5.5	ChatGPT Plus, $20: GPT-6.1 Sol and GPT-6 Luna, with the CLI, editor extension and cloud
Top plans	Ultra, $99.99 for “5x higher usage limits vs. AI Pro,” or $199.99 for 20 times	Pro, $100, $200 or $500
Claude	Sonnet and Opus 5.5 on paid Pro and Ultra; Sonnet and Opus 4.6 on free accounts until November 18	None on a plan
GPT	GPT-OSS-120b until November 18; OpenAI’s models “Coming soon”	OpenAI’s GPT-6 models
How usage refreshes	Weekly without Pro or Ultra; every five hours on them, under weekly limits	Five-hour limits on Plus, and “Weekly limits may also apply”; no five-hour limit on Pro; shared with ChatGPT from December
Past the limit	AI credits, on Pro and Ultra	ChatGPT credits, on Plus and Pro, or an API key
Your own API key or endpoint	Not supported	Yes, for local work
Local models	Not supported	Ollama or LM Studio, with --oss
Suggestions as you type	Tab in its IDE, unlimited on every plan	None; you give it a task
Agents in the cloud	Remote agents on Pro and Ultra, rolling out since November 3	Codex Cloud, from Plus
Scheduled work	Automations, on every plan, alongside the app	Scheduled tasks; ones that use local files need the computer on and the app running
From your phone	Any browser: Remote Control with your computer on, or remote agents	The ChatGPT app for iPhone and Android, with Codex Cloud or a connected Mac or Windows PC
Sandbox on Windows	Needs Windows 11 24H2 or later with the August 2026 update	Native, with fallbacks for machines without Microsoft’s newer isolation
Project instructions	AGENTS.md, GEMINI.md or .agents/rules	AGENTS.md
For teams	Gemini Enterprise, from $30 a seat, or pay as you go	ChatGPT Business, $20 a user a month billed yearly, or $25 monthly
Your data	Used to improve Google’s products, and people may review it; you can opt out in Settings	May train OpenAI’s models on Free, Plus and Pro; you can opt out

How they score

Artificial Analysis’s Coding Agent Index runs agents through three benchmarks, and it’s the nearest thing to a neutral measure. On the setups you can pick today, the two are close.

Agent and model	Index	API cost per task	Time per task	Plans from
Codex, GPT-6 Astra at max effort	54.7	$7.04	25 minutes	ChatGPT Plus, $20
Codex, GPT-6.1 Sol at max effort	54.1	$1.50	24 minutes	ChatGPT Plus, $20
Antigravity CLI, Gemini 4 Argon at high effort	53.2	$11.73	35 minutes	Google AI Pro, $19.99
Antigravity SDK, Gemini 3.8 Flash at high effort	33.3	$2.51	13 minutes	Free
Codex, GPT-6 Luna at max effort	31.1	$0.16	21 minutes	ChatGPT Free

The cost is what the test’s tokens come to at API prices, not what you pay on a plan, and neither company says how much of a plan a task uses. Two limits on these numbers: the index doesn’t test Claude in Antigravity, and it tested Gemini 3.8 Flash through Google’s SDK, not the app. It also scores Antigravity’s CLI with Gemini 4 Carbon at 59.4, but Carbon isn’t on Antigravity’s models page, so you can’t choose it there. A point between 54.1 and 53.2 shouldn’t decide this. The API cost matters more once you’re past your plan’s limit and paying for tokens, through credits on either, or a key on Codex. Otherwise, let the models your plan reaches decide.

Antigravity

Best for: a free agent with Gemini, and Gemini and Claude together on one flat plan.

“The Google Antigravity App is your dedicated platform to work with agents,” says its product page, where you “Orchestrate multiple autonomous agents working in parallel across independent projects.” It downloads for macOS, Windows, Linux and Googlebook. Beside it are Antigravity CLI, the Antigravity IDE, whose Editor view “offers tab autocompletion,” and extensions for VS Code, Visual Studio, JetBrains IDEs, Zed, Xcode and Eclipse. Its features include worktrees, subagents, a browser subagent that “drives Google Chrome to test and debug web pages,” and Automations that send “messages to your agents on a schedule, even while you’re away.” Every plan gets “Access to all product features, such as scheduled tasks and the CLI,” and “Unlimited Tab completions.”

Price: free, with Gemini 3.8 Flash and, per Google’s plans page, “A meaningful quota, refreshed weekly.” Google AI Plus, at $4.99 a month, shares the free column of the models table. Google AI Pro, at $19.99, gives “A high, generous quota, refreshed every five hours until the weekly limit is reached,” Gemini 4 Argon, and Claude Sonnet 5.5 and Opus 5.5, with usage for “Claude and GPT models” metered apart from “Gemini Models.” It also brings the Gemini app and 5 TB of storage. Ultra costs $99.99 a month for “5x higher usage limits vs. AI Pro,” or $199.99 for 20 times. Past the quota, purchased AI credits on Pro and Ultra “are consumed at standard Gemini Enterprise consumption pricing.”

Watch for: Claude on a free account is ending. Claude Sonnet 4.6 and Opus 4.6, the only Claude models on Free and Google AI Plus, are marked “Will be removed on November 18, 2026,” and Google lists Sonnet and Opus 5.5 as “Available on Google AI Pro for non-trial subscriptions only,” as our memo on the change explains. Google publishes no quota sizes, its subscriptions page calls AI Pro’s share “Entry rate limits,” and “Usage limits for this service are subject to modification.” You can’t bring a key or a local model: there is “currently no support” for “Bring-your-own-key (BYOK) or bring-your-own-endpoint for additional rate limits.” Remote agents are for Pro and Ultra on personal accounts, and “rolling out gradually,” so you may not have them yet. And Google’s terms say “We use Interactions to evaluate, develop, and improve Google and Alphabet research, products, services and machine learning technologies,” and “Google employees and contractors may access, view, review and use Interactions,” though its FAQ says “You can opt out of data collection at any point from the Settings panel.”

Codex

Best for: handing whole tasks to OpenAI’s GPT-6 models on a ChatGPT plan, with the most ways to run them.

OpenAI’s desktop app is where Codex runs on your computer: “Run projects in parallel, work with files, use your computer, and keep long-running work moving from one desktop workspace.” It’s for macOS and Windows, and on Linux it “is available in preview.” On Windows, it “runs natively on Windows using PowerShell and the Windows sandbox,” or in WSL 2. The Codex CLI “is a coding agent from OpenAI that runs locally on your computer,” open source under Apache 2.0. Its editor extension works in “VS Code and compatible editors,” and “Xcode and JetBrains IDEs provide their own integrations.” Codex Cloud gives each task its own workspace, which “can keep working while your computer is asleep,” and on your phone the ChatGPT app for iOS and Android controls cloud tasks or a connected Mac or Windows computer.

It also lets you choose what runs underneath. You can sign in with an API key for local work, and its config file lets you “Define more providers,” or run against “a local ‘open source’ provider such as Ollama or LM Studio when you pass --oss.”

Price: Codex’s pricing gives Free, and Go at $8 a month, “GPT-6 Luna at Standard speed in the desktop app, subject to rollout.” Plus, at $20, adds “Codex on the web, in the CLI, in the IDE extension, and on iOS” and “GPT-6.1 Sol and GPT-6 Luna.” Pro is $100, $200 or $500 a month, and “Pro plans currently have no five-hour limit.” OpenAI estimates that Plus allows 15 to 160 local messages every five hours with GPT-6.1 Sol, and 5 to 45 with GPT-6 Astra. Past the limit, Plus and Pro “can purchase additional credits,” and “All users may also run extra local chats using an API key, with usage charged at standard API rates.” Our ChatGPT Plus vs Pro guide covers which to buy.

Watch for: OpenAI says its counts “are not fixed message limits,” and “Weekly limits may also apply.” Codex already shares them with ChatGPT Work, and from December with chat too: “Starting in December, Plus, Pro, and Business plans’ usage allowance will be shared across ChatGPT and Codex,” says its help center, with no size given yet. Our memo on it has what’s known. Free and Go get one model. Codex Cloud is for “eligible Plus, all Pro tiers, Business, Enterprise, Healthcare, and Education accounts, subject to rollout and workspace settings,” and on your phone, “Availability depends on rollout and your workspace settings.” A scheduled task that uses your files needs you to “Keep the computer on and the app running.” Codex doesn’t suggest code as you type, so if you still write much of the code yourself, you’ll want an editor beside it. On personal plans, OpenAI says “we may use your content to train our models” unless you opt out, and some users report that setting turning back on, which we couldn’t confirm.

Both, side by side

Best for: Antigravity’s free Gemini for routine work, and Codex for the work that needs GPT-6.

Nothing stops you from installing both, and one file can brief them. Antigravity’s rules say “You can place an AGENTS.md or GEMINI.md file” in your project and its parent folders, and “Codex reads AGENTS.md files before doing any work,” per OpenAI’s docs. Give each its own branch: Antigravity’s “Projects natively support Git worktrees,” and Codex’s worktrees “let Codex run multiple independent chats in the same project.” They can share an editor too: Antigravity’s VS Code extension is a “Lightweight extension in the VS Code Marketplace for macOS, Linux, and Windows,” and Codex’s installs beside it, from Plus.

Two $20 plans also reach further than either alone. Google AI Pro and ChatGPT Plus come to $39.99 a month, for Gemini 4 Argon, Claude Opus 5.5 and GPT-6.1 Sol, though Claude there runs in Google’s agent, on Google’s quota. If Claude is what you need most, our Antigravity vs Claude Code guide covers Anthropic’s own.

Price: Antigravity’s free plan, plus a ChatGPT plan, from Free. Or Google AI Pro and ChatGPT Plus, at $39.99 a month together.

Watch for: they don’t share conversations. When you move a job from one to the other, the second starts fresh, so tell it where things stand, or keep notes in a file both can read. You watch two sets of limits. And don’t sign other tools in with your Antigravity login: Google’s FAQ says “Using third-party software, tools, or services to access Antigravity is a violation of our Terms of Service,” which “can result in suspension or termination of your account.”

If your company runs on Google Cloud, there’s a third way to mix them: Google says customers can “connect their local Codex CLI and Desktop workflows directly to our Gemini platform for inference.” That’s OpenAI’s models billed through Google, not Gemini in Codex, and it’s in private preview for select enterprise customers, as our memo on it explains.

Enjoy

Best for: Antigravity and Codex in one conversation, when you want both on plans you already have and don’t want to brief the second agent yourself.

Enjoy is a desktop app for Mac, Windows and Linux that runs Antigravity on your Google account and Codex on your ChatGPT account, beside Claude Code, Grok Build, Muse Code, and local models through OpenCode. It’s another way to run both, and it adds:

• One conversation across both. Hand a job from Antigravity to Codex and back: “The new agent gets the conversation so far, including replies from other agents, before it works on your message.”
• Both sets of limits, in view. Enjoy shows “the limits Google shows for each group of models, such as Gemini · Weekly,” and the limits Codex reports, with any credits and free resets.
• Limits handled. When Codex runs out, Enjoy switches to another of your accounts with usage left. Otherwise, the conversation waits for the reset and carries on, or you select Stop waiting and choose the other agent.
• Every project at once. Each conversation runs its own agent, and JOY keeps an eye on all your projects: ask it what needs you, or start work in any of them.
• Your history, brought along. Open your Codex projects in Enjoy and import their conversations.

Price: Enjoy is one monthly subscription, and the first seven days are free, with a card to start. It includes your phone and any browser and your other computers, and each teammate you invite needs a subscription of their own. See pricing.

Watch for: each agent runs on its own company’s plan. Enjoy doesn’t add GPT to a Google account or Gemini to a ChatGPT account. Antigravity in Enjoy runs “the Gemini models Google offers your account,” as our Antigravity guide says, so for Claude through Google, use Google’s own app. Enjoy runs Antigravity through the server Google offers “for Xcode, JetBrains IDEs, Zed, and custom ACP clients,” as its changelog puts it, with one Google account in every project, and its default mode, Bypass permissions, “approves every action, including commands and file changes.” Its code editor doesn’t suggest code as you type. Waiting out a limit needs “Your computer must be on, with Enjoy open, when the usage resets,” and scheduled workflows also run only while it’s awake with Enjoy open. Enjoy isn’t open source, and it’s a monthly subscription on top of your AI plans once the free week ends.

When to stay with the one you have

Stay with Antigravity if Gemini does your work: it’s free, with Tab, the agent and Automations on every plan. If you already pay for Google AI Pro for its storage or the Gemini app, Claude Sonnet 5.5 and Opus 5.5 come with it too, as long as it isn’t a trial. On a free account, plan now for November 18.

Stay with Codex if GPT-6 does your work, or if you rely on Codex Cloud, the ChatGPT app on your phone, an API key or a local model. Antigravity offers no GPT-6 yet, takes no key, and its cloud agents have only begun to roll out.

Add Antigravity to Codex, or move, when you want Gemini, or Claude without a separate Claude plan: its free plan costs nothing to try, and Google AI Pro brings Claude Sonnet and Opus 5.5 for $19.99 a month. Add Codex to Antigravity, or move, when you want GPT-6, your own key, or a phone app. Neither company tells you how much work a plan buys, and both start free, so run the same real task in each before you pay.

How we compared

We read Google’s Antigravity product, downloads, pricing, plans, models, features, schedule, sidecars, sandbox, remote agents, Remote Control, rules, extensions, FAQ, terms and changelog pages, its Google AI plans and its post on OpenAI’s models; OpenAI’s Codex pricing, ChatGPT pricing, models, desktop app, Linux and Windows app, Windows sandbox, Computer Use, CLI, configuration, authentication, IDE extension, cloud, mobile, remote connections, scheduled tasks, worktrees and AGENTS.md docs, and its help pages on Pro, usage limits, Codex plans and data use; and Artificial Analysis’s Coding Agent Index, all on November 4, 2026, and every one is linked below. We quote each company’s own words for its limits and leave out what it hasn’t documented, such as the size of Google’s quotas, the size of ChatGPT’s shared allowance, or when OpenAI’s models reach Antigravity. Plans and models change often, so we recheck this guide against its sources at least once a month, and the date at the foot of the page says when we last did.