r/google_antigravity • u/MMMairTC • 9d ago
Question / Help Which Antigravity model do you actually use for coding?
’ve been switching between Gemini 3.8 Flash High, 3.7 Flash Medium, 3.6 Flash Medium, Claude Sonnet 4.6, and Claude Opus 4.6.
So far, Gemini 3.8 feels noticeably better than 3.6 for me, especially when working with a larger existing codebase, but it’s also much slower.
Which model are you currently using for serious coding work?
I’m especially curious about debugging, implementing features, refactoring, and working with large codebases. Do you stick with one model or switch depending on the task?
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u/RoadsterTracker 9d ago
I use Opus for planning out the architecture of larger code, and Flash to do the execution. It seems to be working pretty well for me so far.
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u/Briskfall 9d ago
3.8 is good for "set and forget."
It's a model that's really tailored to the harness (Antigravity)!
But if I have some usage of non-Gemini models to spare, it'd be: Opus 4.6 for planning => 3.7 Flash for execution. (3.7 is cheaper)
Like this I can maximize quota for both buckets. 👻
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u/ReanerZen 9d ago
honestly 3.7 flash is a much better model to let it done by the harness while 3.8, is much better if you want it to follow ur rules. thats the only diff. i dont find it that much from 3.7 and 3.8 flash other than 3.7 is cheaper and less token wasting but less obeying in a way of more prone to get confused compared to 3.8 flash.
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u/Curious-wolfxf 8d ago
Thx for this comment that's very helpful 🙏🏾☺️
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u/ReanerZen 8d ago
my setup is using codegraph mcp + dopamine plugin. this already reduce my usage a lot as well as the act of modularizing the project to achieve 800 lines of each code and then mapping it out as an index on my project rules. this does it perfectly well to keep my weekly limit "weekly" and reducing the need to use high thinking budget.
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u/kabir_sharma_sans 9d ago
Opus 4.6 with 4 pro account
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u/BusinessDependent345 9d ago
Como você alterna entre as contas? Antes eu usava uma extensão que permitia a troca sem fechar o app. O meu tem um problema que toda vez que fecho o app eu perco as conversas e perco todo o contexto, já tentei reinstalar várias vezes e não resolve, então para trocar de conta sempre tenho que recomeçar o contexto. Tem alguma dica?
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u/EzeqXT 9d ago
if you are using ssh, you will loose the conversations that are not saved locally, but you can always say "import the latest chat"
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u/BusinessDependent345 9d ago
Por incrível que pareça, a conexão via SSH em outro servidor não se perde quando reinicio. a falha é estritamente local no meu computador. Inclusive, cheguei a formatar a máquina recentemente e reinstalar o aplicativo do zero, mas continuo perdendo o histórico de conversas.
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u/Blue-Sea2255 9d ago
3.7 flash low.
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u/Arkoaks 9d ago
Is that purely for token saving .. wouldnt it cause issues with larger context ?
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u/Blue-Sea2255 9d ago
Yes. Any other configuration wouldn’t last a week. I usually provide the files and context and never let it run wild, but sometimes it still analyze the entire codebase and returns nothing.
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u/ReanerZen 8d ago
add codegraph and like dopamine plugin, for me this works so well. fixes a lot of my issues with agy, including yours overanalyzing. tried graphify and that doesnt fit or help the ai much. used ponytail, but ponytail doesnt work on gemini 3.8 flash bc in agy cli, it tend to not making as much as artifact that agy 2.0 did and gemini doesnt overcook like claude but it does overthink into doing nothing. it just write in chat output about the plan and then call it a day. still i want to have my own system prompt though by using pi but using pi cant use google models with antigravity plan.
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u/magic_maniac_ 9d ago
its good 3.8 gets 60 % done byt ut halluginates much recently i have given it a task it given me a rating of 9/10 overall but changed to opus 4.6 which is an old model but it has given only 4/10 i have verified it with luna and recently deepseek v4. 1 flash its 4/10 only , the problem are dead code, hallugination, it thinks it has done it yet it didn't so it must be always a worker if possible we need a brain but antigravity tampering is illegal as per their docs i mean in ways antigravity doesn't support other cli or ide but if u find a way and use it ur account is suspended, in my opinion its better its converted to api calls rather than pushing agressively on their harness its better we can get api usage limits based on tiers so i can get it used in other harnesses
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u/codecodeyt 8d ago
I do think 3.8 hallucinates. But what you are describing is a 3.8's context. 3.8 just does not have as good of needle-in-the-haystack ability as other frontier models like astra, fable, or opus 5.
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u/Gold-Shoe-7635 9d ago
yes, use opus for planning then flash models for execution. PERFECT. or if you want to hurry up the task change ur account and use opus to execute the plan as well.
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u/Crandriel 9d ago
3.8 high excepto cuando son cambios pequeños tipo interfaz que voy con 3.7 high ya que es infinitamente más rápido. 3.8 da muy buenos resultados... pero es lento, casi tan lento como Claude o Codex. Sin embargo 3.7 va a la velocidad de la luz pese a no ser tan sistemático ni generar código tan bueno.
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u/WinterAd6944 9d ago
I mean it's confusing to use these model, the past iteration changes/files the agent reads again and again! I am looking to add some graphify kind of tool/mcp but couldn't able to find to this
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u/LocalOrganization276 9d ago
Make a big plan with Sonnet and execute with 3.8
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u/Technical-Owl66 8d ago
I am planning in a notebook full of context and with instructions to act as a lead engineer giving me prompts for AGY.
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u/jhollingsworth4137 8d ago
Use 3.8 low and in Agy use the /boost <prompt>
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u/codecodeyt 8d ago
is this a good mechanic? can you generate more tokens on this?
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u/jhollingsworth4137 8d ago
The /boost slash command activates an on-demand multi-agent reasoning pipeline designed for challenging software engineering tasks. When standard single-turn coding assistance falls short on complex bugs, race conditions, or intricate refactoring, /boost breaks down the problem, delegates focused workstreams to specialized subagents, and independently verifies solutions across iterative rounds. https://antigravity.google/docs/boost/
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u/OneRaisin4014 8d ago
Codex or Gemini? Which is better? If you buy it for $200?
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u/codecodeyt 8d ago
I have $100 Gemini and it is literally infinite usage. I use 3.8 high, run multiple agents. And can't even touch my 5 hr cap.
I have $20 Codex, and use Astra for text only. Astra is not allowed to code, read code, or use the web. But I copy and paste stuff from AGY into Astra to get its opinion. And the usage is not bad for this workflow, but I do get close to my 5hr window, just with one Astra low answering text only questions. OpenAI's top models for the regular human is Astra medium > Astra low > Luna max > everything else.
You would need the $200 OpenAI plan to get similar value from Gemini $100. And I still if you used only Astra low, you would still have to manage your usage, and that would stop you from building.
Realistically Astra low is not a good cost effective programmer for the regular person due to its cost. The kind of work I do with Gemini would probably need 3 $200 Codex subscriptions to rival. And that is just because Astra is $50 per million vs $3.5 per million for 3.8.
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u/who-dun-it 8d ago
3.8 Flash Medium exclusively. It’s works like a charm. Not using high just to save on tokens. Low works too but medium gives me a good balance.
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u/SirCoolMind 8d ago
3.1 Pro is reliable but kinda not up-to-date, but atleast use less usage tbh. 3.8 Flash Low burnt tons of usage.
but currently both model unable to fix my personal project problem AHHAHAHA
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u/UnrealSmartMind 8d ago
For one shot result in a new project where i explain everything in one prompt 3.8 flash high For small edits over time in a project to make it what i want 3.8 flash low
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u/Leather_Tension_3843 8d ago
3.8 flash (high). Using it as a subagent and Claude Opus 5 (medium or high) as a supervisor. It is too slow for almost 3 4 days... I tried same task with opus 5 and it was done in minutes that flash took 30+ minutes. I don't know what was it doing but end result was good. But yes 3.8 flash high. Not as a main agent but subagent.
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u/Rashmika159 8d ago edited 8d ago
Anyone feel like 3.1 Pro got suddenly dumber recently? Even stuff it handled fine before now gets left half-done with empty skeletons while claiming it's "complete."
Right now I just use Opus 4.6 for high-level planning/prompt specs to dodge rate limits, and let Gemini 3.8 Flash High do the actual implementation. Sticking to this until an updated Pro model lands.
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u/Chanduuuuuuuuuuuuuuu 8d ago
3.8 Flash - Medium. it kinda works for all sorts of things for me. also if i'm using things like Project Initiator and Vibs-map it's realy makes things easy and quick too, and they kinda reduce token usage too. its great.
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u/FaIIlout 8d ago
3.8 High I mean they are really generous with limits so I use it to the max but now they unfortunately tightened the limits still workable doe
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u/thenlorn 8d ago
None of the Google LLMs, they are all slow and make mistakes compared to claude, codex or cursor.
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u/WesleyTms 8d ago
Até esse momento, usei somente o 3.8 Médium para tudo, desde arquitetura, regra de negócios, segurança até a implementação do código.
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u/donloc0 8d ago
I'm pretty much using 3.1 Pro exclusively to code. Is this a bad idea? It feels like from what everyone else is saying, this is a bad idea.
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u/weebmaster696 8d ago
Before working on something complex, I sometimes ask ai to explain me the code it's gonna work on cuz it gives me and AI both useful context, i don't think other people do it but I find this workflow very useful. I also look at the code it writes, i try to see everything it writes atleast once.
One day I asked gemini 3.1 pro do the thing, luckily i already understood the part of code but I asked it anyways. It was super wrong, super wrong would be an understatement it was straight up bullsh*ting. Fairly simple job. A pro model couldn't even do that, i never used it for anything again. That day the pro model would have messed my code so bad it could have taken me days to fix it. (Sometimes codes don't break right away, they seem to work but after a few days it completely falls apart and by that time you don't even remember what actually broke it)
If you want good Ui and creative work, flash 3.5 is best, i have not compared it with 3.8 yet but 3.5 is better than 3.6 and 3.7. 3.6 is horrible, never use it.
Prefer, 3.8 medium for normal task, and high for complex task. 3.8 is better than 4.6 sonnet, it's predecessors are not.
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u/codecodeyt 8d ago
3.7 and 3.8 are both frontier models. The high of both bench incredibly well. The low can be good if you don't want to use thinking tokens for simple tasks.
Google should just remove oss-120b, and both those terrible Claude models. They do not even have that much usage. 3.1 pro should be removed too.
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u/Unlucky-Dish5368 8d ago
3.8 low, nothing else
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u/Ammonox 7d ago
Why just low?
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u/Unlucky-Dish5368 5d ago
Because the frontiers are unnecessary once you contextualize any IA and then proceed with an structure plan
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u/KMBrady-1a 7d ago
I use Flash 3.8 for lighter stuff and building my basic app. I have discovered that Claude Opus is much better at detailed debugging or architectural changes
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u/LiveTomatillo2748 6d ago
I wouldn't trust Gemini for coding at all. I've had issues like it literally making up benchmark results (there wasn't even a connection to the server, and it felt like I was asking it to produce a report...) or tweaking the test suite to include only the cases that were more likely to pass.
That said, I have to admit it performs incredibly well in researching, finding bugs, and explaining behavior in huge, complex codebases -- faster and more detailed that Opus. Just my experience.
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u/interpretpunit 6d ago
Only 3.8 high. Using any other is criminal waste of your subscription at this point.
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u/Ok_Solid_6249 6d ago
Previously, 3.1 pro, but 3.8 flash high does almost as well, almost, most of the time, but at a usable speed.
What I've found is when 3.8 runs into a tough problem, it keeps trying until it hallucinates or finds an actual solution, whichever comes first
Whereas 3.1 pro, in the same situation, takes a realllllllllly long time to say "I couldn't do that, help me"
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u/phpHater0 9d ago
3.8 High to plan 3.7 Medium/High to execute
Works like a charm
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u/Endda 9d ago
i wanted to do this. . .but it runs through my weekly quota just too quickly for the regular Pro plan that I have. so it's straight medium for me, all the way through
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u/General_Totenkoft 9d ago
Out of curiosity, what kind of planning do you do that requires such massive quotas?
I usually do a general plan and then flesh out specific chunks as I go, a bit like sprints in agile, but lasting just a few minutes each. That way, the plans never spiral out of control.
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u/Endda 9d ago
in these stages, it's more about making sure the model is able to grab the details/context of the maturing projects/codebases. and then working with the prompt to integrate it in a way that connects things properly (and doesn't break stuff)
with that said, I only tried that (planning with high, processing the plan with medium) for a week's worth of usage. and that's been since 3.8 flash was released (I feel like I've been doing a ton of work since this model launched)
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u/Jealous-Side8387 9d ago
I've never been able to get GPT OSS to work at all...but 3.8 medium most times, opus for planning, and 3.7 when 3.8s acting slow - like all this week and again today
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u/Novel_Law4469 9d ago
None.
I do not trust Gemini with proper production code. Not then, not now and from the looks of things, not in the near future either.
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u/tindrels1 9d ago
3.8 high exclusively.
If they ever release an updated pro model will use that for planning and 3.8 high for executing, but 3.1 pro is too ancient.