I'm quite happy using antigravity fwiw. I use Claude code for work. Only tried agy because I was already paying for Google one (youtube music, youtube without ads/premium and a few TB of storage).
Antigravity come with Google's models and anthropic - so Gemini 4 Argon, Gemini 3.8 Flash, Claude Opus 5.5 Claude Sonnet 5.5 and GPT-OSS 120B.
Agy is better than Claude code in some ways and vice versa.
Google models are great.
Ironically google music is so terrible I've uninstalled it and use Metrolist exclusively.
I think google models do a decent job helping me put together a blog, for example:
(Content is typical 90s homepage stuff, not great. But model voice isn't as grating as Claude - and while it has a "look" I think it's s bit better).
I've not been impressed with their models. Argon seems good but the usage limits on Pro feel worse than Sol/Astra/Opus on competing plans. But where Luna and Haiku have gotten to point of being 'good enough' for grunt work, I don't feel like 3.8 Flash is there.
That view somewhat biased by Flash getting stuck looping in Antigravity's CLI when I asked if it could add plan usage % to the status line. Instead of "no", it first pretended agy was Claude Code and gave me a wrong answer, then resorted to trying to analyse the binary.
Their harness situation is just awful.
I paid and tried it today and the imagen tool just returns a 500, not sure if a fluke but not a great start
In the past, whenever benchmarks used to show google as being on par with the rest, I tried them and found them extremely lacking.
It's been maybe 6 months since I last tried them in any proper fashion (other than my usual benchmark which is non-coding related), but I was so let down previously, and found it so exhausting to just figure out how to get a subscription working with them, that I really feel like I've given up.
I'm sure I'll get around to trying them. Heck, it could happen today if the mood hits, but....it does need a specific mood. The mood to get over bullshit UX and a profound disdain for the company.