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Posted by bratao 19 hours ago

Gemini 3.8 Flash and 3.8 Flash Cyber(blog.google)
https://deepmind.google/models/model-cards/gemini-3-8-flash/
1012 points | 568 commentspage 6
speak_plainly 17 hours ago|
After struggling with Gemini for months, I think the trick to getting the most out of the model is writing a really solid personal intelligence/instructions prompt. The results are night and day in terms of performance.
titularcomment 17 hours ago||
Funnily enough you really do need a great prompting and SKILLS setup to use antigravity effectively in contrast to other providers which actually started benefiting from less detailed prompts over time. But I like it this way, its more customizable and much cheaper especially with a sub.
porridgeraisin 17 hours ago||
agy is good for those cases where you are willing to put the effort into the harness specifically for a task or family of tasks. The full suite, with evals, monitoring, hooks, custom tools, custom verifiers, etc,. It is not good if you want a "general coding assistant" like codex or claudecode.

The reality is that if you optimise a harness for a family of tasks[1], then most of these models give successful output. And there, gemini flash's speed shines.

For general coding assistant, you want it to be well, general, and you use a harness without too much customisation to something specific. Here you need deeply post trained coding assistants and implementors like codex/sol or claude/opus. Gemini flash in its current form will be too happy-go-lucky if you try using it the way we all use codex and is better used in a constrained setting.

tl;dr gemini flash for "LLM-aided workflows in production" is super good today. Cheap as well.

[1] Stuff like this: https://antigravity.google/blog/teamwork-when-ai-becomes-a-r...

https://hamel.dev/notes/llm/evals/

dakolli 17 hours ago||
slot machine addict thinks if he pushes buttons in a certain order the odds get better.

In all seriousness, gemini has the best interactive planning document/orchestration. Tell it to create a plan document and work through it with it and it will preform really well(in antigravity products). But this is the case with plan modes with every model, I just think the interactive document that antigravity uses is really well thought out.

1saadcodes 4 hours ago||
The recent Sonnet models have been disappointing for me personally which is why I'm going look into using Opus/Fable as the planner and Flash as the executor. Let the expensive model handle the hard thinking and use Flash for implementation and tests so that I can stretch the Opus/Fable usage further
leumon 18 hours ago||
So 89.4% on Terminal Bench 2 but only 19.1% on Tbench 4. Opus 5 is 89.1%/51.8%.
aszen 13 hours ago|
I was thinking the same, obvious suspicion is they benchmaxed it on older bench.
the_duke 3 hours ago||
Google has always done quite a lot of benchmaxing for Gemini.
nharada 16 hours ago||
Meanwhile I pay for Pro and still don't have access to 3.7?
almog 15 hours ago|
Same for me (at least through the Gemini app).
pwython 18 hours ago||
Is there any reason to even use 3.1 Pro now?
fridder 17 hours ago||
In my experience? No. 3.7 is faster and it just seems to get things right more often. Only big architecture tasks and analysis make sense with 3.1, perhaps, but honestly just use the Opus 4.6 to generate a plan and then switch back to flash for the implementation
bitexploder 18 hours ago|||
It is still going to be better at text work, skills, document review, deep reasoning, architecture review, etc. It is only 6 months old, it isn’t like its world knowledge and software knowledge is really out of date. Use it to churn on harder design problems.
exacube 14 hours ago|||
IME 3.1 Pro still has better system-instruction following than Flash 3.7, esp. when there're many conditions and clauses. 3.1 also writes better prose for technical material than Flash 3.7.

Once the system prompt complexity goes up, Flash starts to write very dense english. it might be fine for tasks like coding, but not for user-facing text meant to be digested by the average person.

I haven't tested 3.8 on my workload yet.

Rodmine 14 hours ago||
3.7-flash has been useless many times, specially when context gets bigger. 3.1 is the only Google model that has seen use from me. With extended thinking, 3.7-flash is kinda usable but not without many problems. I find myself falling back to 3.1 often. I don't believe in any benchmarks because whatever they are doing to award 85% to 3.7 on anything, they should seriously reconsider that test for anything.
_aavaa_ 17 hours ago||
Do they officially support you use their AI Pro subscription (or whatever the heck it's called this month, the one that gives you models in antigravity) in a 3rd party harness?
drivebyhooting 9 hours ago||
I’ve used the Gemini flash, but then when I have soul ultra check its work, it found a bunch of cut corners and improper design.

As much as I like the speed and interactivity, I really don’t trust it

ddp26 15 hours ago||
There must be a deeper read on why Google can rapidly ship better small models while being delayed months on the bigger model.

What's the simplest explanation?

cogman10 14 hours ago|
Perhaps post training? I believe I read that Qwen 3.8 is just post trained Qwen 3.6, which is why it was able to be released so quick.

It may be that these flash models are simply post trained larger older models.

robertwt7 8 hours ago||
this is cool for all other non coding task. however I am still stuck on 3.6 flash on my gemini web as a plus user, can anyone else even access 3.7 flash in AU?
Alpha3031 5 hours ago||
AU user also, just checked AI studio since that seemed like the best bet and both 3.8 and 3.7 show up (and can be used for chat in playground, though IDK what the limits for that are). Chat in gemini.google.com is also 3.6 for me but I'm on free tier lol so I don't exactly expect it to show up any time soon. I think there's also another free API beyond the AI studio one (which is 20 RPD free according to docs so not really useful) but I forgot where it was (Google cloud maybe?) and what the limits for that were.
alvah 7 hours ago||
AU Pro user here. 3.8 Flash available (default) in the web app for me.
Galorious 13 hours ago|
Is anyone here using using these models via google subscription (not api). I tried to in the past using gemini cli and then agy - headless invoked by codex and claude code, but they were so incredibly buggy that it stalled 1/2 times and I cancelled. Interested to know if that has changed!
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