Cosyra vs Antigravity: AI Coding Agent on Your Phone

Short answer. Cosyra vs Antigravity isn't agent-vs-agent; it's two different shapes. Antigravity CLI is Google's terminal AI coding agent, the successor to Gemini CLI, built in Go and invoked as agy. It installs on macOS and Linux only; there is no iOS or Android build. Cosyra is a paid mobile cloud terminal: a per-user Ubuntu 24.04 container with Claude Code, Codex CLI, OpenCode, and Gemini CLI pre-installed, reached from native iOS and Android apps. Pick Antigravity to run a Google agent on a laptop; pick Cosyra to run an agent on an actual phone.

We wrote this after checking the facts first-hand. On 2026-07-12 we hit the google-antigravity/antigravity-cli repo through the GitHub API: latest release v1.1.1, published 2026-07-10, 1,572 stars, and still no LICENSE file (license: null). We read the official Bash installer and confirmed it sets BINARY_PATH=".../agy" and probes for Darwin or Linux on x86_64/arm64, with no Android or iOS target. That one detail is the whole comparison: Antigravity has nowhere to run on a phone, and Cosyra puts the machine, and the terminal, on the phone.

This post was written by the Cosyra team. We compared Cosyra against Antigravity CLI based on hands-on testing of both — reading the google-antigravity/antigravity-cli repo and its installer, checking the Gemini CLI transition notice, and running Cosyra from a phone — plus our internal Antigravity factsheet. Versions, star counts, and the no-mobile-build fact were verified 2026-07-12; Antigravity's docs pages are JS-rendered, so quota numbers we couldn't source are left out rather than guessed.

What is Antigravity CLI, and why did it replace Gemini CLI?

Antigravity CLI is Google's terminal-native AI coding agent, announced 2026-05-20 in a Google Developers Blog post titled "An important update: Transitioning Gemini CLI to Antigravity CLI." It shares a unified architecture with the Antigravity desktop app, is rewritten in Go (Gemini CLI was a Node.js binary), and carries over Agent Skills, Hooks, Subagents, and Extensions, though Google is explicit that there isn't 1:1 feature parity at launch.

The transition has a hard date, and it matters if you were using Gemini CLI on a phone through a free personal Google account. On 2026-06-18, Gemini CLI and the Code Assist IDE extensions stopped serving requests for free individual users, Google AI Pro subscribers, and Ultra subscribers. What kept working: organizations on a Gemini Code Assist Standard or Enterprise license through Google Cloud, and anyone calling Gemini through a paid API key. If you drive Gemini CLI from a phone with your own paid key (BYOK), that path is unaffected; if you were on the free personal tier, Antigravity CLI is where Google is pointing you now.

So the honest framing for this page: Antigravity CLI is the current Google terminal agent, and it's a good one. The question isn't whether it's capable, it's where it can run, and for a phone the answer is "nowhere native."

How do Cosyra and Antigravity CLI compare feature by feature?

Cosyra is a cloud Ubuntu container reached from native iOS and Android apps with AI agents pre-installed; Antigravity CLI is a macOS/Linux terminal agent that runs on your own machine. Antigravity is free with a Google account and keeps your code on your laptop; Cosyra is the machine that runs an agent on the phone itself. The table lines them up on thirteen attributes, verified 2026-07-12.

Where does the coding actually run?

The headline that matters for a phone isn't price or model quality, it's where the code runs. Antigravity CLI runs on the machine you install it on: a Mac or a Linux box. Its installer probes for Darwin or Linux and picks an x86_64 or arm64 build (glibc or musl); it has no path onto iOS or Android, and the official installer doesn't target Termux's bionic libc. Cosyra has one surface — a native app over a cloud container — and the agent runs there, on hardware you never have to own or keep on.

We reach the same container from an iPhone on the train, an Android tablet on the couch, or a laptop browser at a desk, and it's the same files and the same half-finished agent session each time. Antigravity's model assumes there's a computer in front of you, and the CLI runs on it. If that computer is a phone, the assumption breaks, because Google didn't ship a phone build.

Where does Antigravity CLI beat Cosyra?

Antigravity beats Cosyra on being free with a Google account, on running locally so your code never leaves your machine, on deep Gemini integration, and on being a first-class Google product with a desktop app beside it. We ship a paid mobile product and we still think Antigravity is the right tool for a lot of people. Here's where it's the better pick.

• Free with a Google AI account. If you already pay for Google AI Pro or Ultra, or you use the free Code Assist for individuals tier, the CLI costs you nothing on top. There's no separate compute bill and no card to add. Cosyra's compute past the free hour and trial is a $29.99/month subscription — on price to start, Antigravity wins.
• Your code stays on your machine. Antigravity runs the agent locally, so your source never leaves the laptop unless the model call sends it. For air-gapped-ish workflows or strict data-handling rules, a local CLI is easier to reason about than a cloud container. (Worth knowing: per its README, using the CLI opts you into Google collecting your "Interactions" data to improve the product, which you can turn off in settings, so check that if privacy is the reason you're choosing local.)
• Deep Gemini integration, and a real 1.x line. It's Google's own agent, tuned for Gemini, shipping fast, going from v1.0.4 in early June to v1.1.1 by 2026-07-10. If you want the tightest Gemini experience in a terminal, this is the first-party path.
• Built for remote boxes. Antigravity's auth flow detects an SSH session and prints an authorization URL you complete locally, and the installer ships glibc and musl Linux builds. It's clearly designed to run on servers, not just laptops, a genuine strength if you live in remote shells.
• A desktop app beside it. The CLI shares a unified architecture with the Antigravity desktop app, so if you want a GUI editor and a terminal agent from the same vendor, Google gives you both. Cosyra is terminal-only by design.

Where does Cosyra beat Antigravity CLI?

Cosyra beats Antigravity on the one thing this page is about: running a coding agent on an actual phone, with a real terminal, over a workspace that follows you across devices and needs no laptop kept awake. Antigravity has no phone build to beat — so the comparison is really "a mobile terminal" versus "no mobile at all."

It runs a coding agent on the phone; Antigravity has no mobile build

This is the load-bearing difference. Antigravity's installer targets macOS and Linux only, and Termux's bionic libc isn't supported, so there's no sanctioned way to put agy on a phone. Our native Google Play and App Store apps put a real Ubuntu terminal in your hand, and that terminal runs agents directly: Claude Code, Codex, OpenCode, and Gemini CLI are already on the PATH. If you want to code from a phone at all, that's the gap.

No laptop to keep awake

Antigravity runs on the machine you installed it on. To reach it from a phone you'd need that machine on, reachable, and set up for SSH, a home server you power and babysit. Our container is the always-on Linux machine, in the cloud, reached from a native app with nothing running at home. It keeps working whether your laptop is shut or in another city.

Not locked to one model vendor

Antigravity authenticates to your Google account and runs Gemini. That's great if Gemini is your model; it's a wall if it isn't. We're BYOK, so the same container runs Claude Code against Anthropic, Codex against OpenAI, Gemini CLI against Google, and OpenCode against whatever you point it at — from one phone, one login, one shell. You pick the model per task, not per vendor account.

A persistent workspace across devices, no machine to supply

A Cosyra container persists in the cloud and is the same container whether you reach it from an iPhone, an Android tablet, or a laptop browser. Drop your phone, buy a new one, log in, and your repo, your shell history, and your half-finished agent session are still there. With a local CLI like Antigravity, coding state lives on whatever machine you installed it on; move devices and you're setting it up again.

An opinion Antigravity's crowd will push back on

We think the phone keyboard is fine for agent-driven coding, and that a phone terminal running the agent beats a laptop CLI you can only reach when the laptop is on. Plenty of good engineers will disagree — at a desk with a real editor and a fast local shell, agy is a lovely way to work, and they're right about that. But for someone who wants to kick off and steer an agent from a phone in a waiting room, "install our CLI on your Mac" isn't an answer; it's a reason to leave a laptop running. That's the exact reason we built Cosyra as a hosted container with a native app instead of another desktop-only binary.

Who should pick Antigravity CLI instead of Cosyra?

Pick Antigravity CLI instead of Cosyra if you code on a Mac or Linux laptop, you're already in Google's AI ecosystem, or you want your source to stay on your own machine. For those profiles Antigravity is the better tool, and we'd tell you so.

Try Antigravity first if you are one of these profiles

• Laptop-first and in the Google ecosystem. You code at a Mac or Linux machine, you pay for Google AI Pro or Ultra (or use the free Code Assist tier), and a phone isn't your primary surface. Antigravity is free on top of what you already pay and tuned for Gemini — that's a better fit than a paid mobile container.
• Local-only by policy. You need the agent and your source on a machine you control, not a cloud container. A local CLI is easier to reason about for that; just remember to check the data-collection opt-out in settings.
• Server and SSH heavy. You live in remote shells and want a Google agent that authenticates cleanly over SSH. Antigravity's SSH URL-paste auth and glibc/musl Linux builds are built for exactly that.

We use terminal agents at our desks too. The line we draw is mobility: when we want an agent on a phone with no PC to keep open, a macOS/Linux-only CLI can't get there, and a hosted container with a native app can.

How do you try Cosyra if you're coming from Antigravity?

You try Cosyra from an Antigravity background in about two minutes: install from the App Store or Google Play, sign in, and you land in a fresh Ubuntu 24.04 x86_64 container instead of a laptop shell. Your four agents are already on the PATH, including Gemini CLI, if Gemini is the model you came for. The session below is what we run on a fresh install.

The big unlock for most people coming from Antigravity: there's no laptop in the loop anymore. The container is the always-on machine, it hibernates when idle and resumes where you left off, and you reach it the same way from any device. The agent runs in it whether the app that started it is an iPhone or an Android tablet.

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