Gemini 3.5 Flash reaches 800 tokens per second inside the app.
It's incredible to see how strongly Google coalesces around @antigravity!
@_mohansolo is the 3rd person on the main keynote after Sundar and Demis!
Antigravity 2.0 is expanding the agentic power, announcing a new SDK and CLI tools and Native voice support!
Users criticized Google's replacement of Gemini CLI with the closed-source Antigravity tool for dropping ACP support and releasing glitchy versions, while others praised the new app and its Go-based harness for being superior.
No Digg Deeper questions have been answered for this story yet.
Microsoft is obsessed with backward compatibility - even if this means slower iteration
AWS is obsessed with predictability - even if this means large strain on their devs
Google is obsessed with their devs' wellbeing - so you have to do the work their devs did not want to
Google released Antigravity CLI as the only way to use CLI now (3.5 Flash is not available in Gemini CLI anymore).
And ofcourse, they do not migrate settings/skills/MCPs anything from Gemini CLI to Antigravity CLI automatically.
Classic.
Anyone understand what Google mean by "Gemini Spark runs on Gemini 3.5 and uses the Antigravity harness" - is "Antigravity" a generic term they're using for their agent harnesses now or is their Claw-competitor running the same closed-source Go binary we can download ourselves?
So google is replacing gemini-cli with agy (antigravity cli), but: 1. agy is not opensource 2. It no longer supports ACP
Really unfortunate development
The new Gemini CLI harness, antigravity, is written in Golang
I don't have much to say about this year's Google I/O because I prefer to write about products that have shipped, not just "coming soon" announcements - but here are some notes on Gemini Spark and Antigravity https://simonwillison.net/2026/May/20/google-io/
Just got off stage at I/O and we launched a lot but very excited to bring you all Antigravity 2.0 powered by Gemini 3.5 Flash. AGY 2.0 is our new app with a more powerful agent that can spin up subagents and even build an OS. 3.5 Flash is also more powerful than 3.1 Pro and runs at 800 tokens per second only on Antigravity.
This is a new way to build! Hope you all enjoy.
So excited to try out the Antigravity SDK 👩🏻💻
#googleio
curl -fsSL https://antigravity.google/cli/install.sh | bash
(Don't pipe mystery curls you see on twitter into your sh without checking! https://antigravity.google/download)
The new Gemini CLI harness, antigravity, is written in Golang
Very excited by the new suite of Antigravity products - in particularly can’t wait to see what folks build with our new SDK!
We’re expanding Google @Antigravity’s agentic surfaces and features — and they’re all available now for you to try.
🔹 Antigravity CLI 🔹 Antigravity SDK 🔹 Native voice support with Gemini Audio models 🔹 @Antigravity 2.0 desktop application 🔹 Integrations with @GoogleAIStudio, @Android, @Firebase, and the web
#GoogleIO
so, do i use gemini-cli or antigravity-cli?
@simonw Would love to hear your feedback on
http://x.com/i/article/2056771072473862144
That sentence quoted from: https://blog.google/innovation-and-ai/products/gemini-app/next-evolution-gemini-app/
Anyone understand what Google mean by "Gemini Spark runs on Gemini 3.5 and uses the Antigravity harness" - is "Antigravity" a generic term they're using for their agent harnesses now or is their Claw-competitor running the same closed-source Go binary we can download ourselves?
We've optimized Gemini Flash to be 12x faster inside Antigravity.
Google literally said "your margin is my opportunity" 😂
12x faster!?
It's incredible to see how strongly Google coalesces around @antigravity!
@_mohansolo is the 3rd person on the main keynote after Sundar and Demis!
Antigravity 2.0 is expanding the agentic power, announcing a new SDK and CLI tools and Native voice support!
@pvncher Check OpenClaude bro pure opensource
@pvncher @thdxr i think they were banning people. pi removed it
@GergelyOrosz Google's dev wellbeing strategy: build something cool, abandon it 18 months later, let the community figure out the migration path
@NotThackerWill they used to be obsessed with individual impact
since 6-12 months ago, Zuck is obsessed with AI, and the 90%+ of ppl not working inside AI groups now have no idea what the company is obsessed with
it's a weird meltdown, right as Meta is becoming the biggest ad business globally
@simonw It uses the same Harness as inside the Antigravity products. This must not mean it is the same agent.
Anyone understand what Google mean by "Gemini Spark runs on Gemini 3.5 and uses the Antigravity harness" - is "Antigravity" a generic term they're using for their agent harnesses now or is their Claw-competitor running the same closed-source Go binary we can download ourselves?
@pvncher wait the killed gemini cli?
F, end of an era, we barely new it.
@mattlam_ I have no clue if they will. Probably not if they wanna push people to antigravity.
Claude doesn't support ACP. The official adapter is made by Zed, and wraps AgentSDK.
