Gemini Flash
Google's fast, lower-cost Gemini large language model tier, available via the Gemini app and API.
HN commenters use it as a fast, low-cost daily driver for coding and research,12345 often executing plans written by a stronger model.6789 The most common complaints are tight usage limits and flaky availability,10111213 and several say it struggles with long-horizon work and heavy refactors.141516
Why people recommend it
Speed · 3
Commenters repeatedly describe it as very fast, which makes quick iteration pleasant.
“It's ridiculously fast, and generally very good with real-world knowledge.”
“when I want a very quick response, my go-to is Gemini Flash. It's just really damn fast”
Show 1 more
“Working with de speed of Gemini 3.7 Flash is such a delight”
Coding · 3
Many use it for most of their coding and say it does solid work, especially with a clear plan.
“I use Gemini 3.8 Flash as my daily driver for most coding.”
“3.8 Flash does really well for writing code as long as you give it a good design and plan to follow.”
Show 1 more
“I use 3.8 flash in Antigravity a lot, and thoroughly prefer it to most Pro-class models.”
Low cost · 3
Users call it cheap or nearly free, with quotas that go far on lower-priced plans.
“it's fast and almost free (sufficient quota with pro account)”
“It’s very competent, and quite a bit cheaper than Claude.”
Show 1 more
“I use Junie straight from my JetBrain's IDEs that in turn uses Gemini Flash. Very cheap and more than enough for my use.”
Daily driver · 3
Several commenters say it has become their favourite everyday model.
“3.8 Flash has been my favourite model and daily driver for a little while now.”
Show 1 more
“I use 3.5 flash 10x more than any other model”
Research and knowledge · 3
Praised for web-search-style queries, real-world knowledge and general research.
“for what amounts to a web search Gemini 3.8 flash is better than the big models”
“Gemini Flash is the one I get most excited about, because it's so fast and so good at real-world knowledge”
Show 1 more
“excellent model for general (re)search.”
Plan executor · 3
Commonly paired with Opus or similar for planning or review while Flash does the implementation.
“Currently I'm building my own generative modeling + aero sim package largely using Gemini and it's been working great.”
“If there's already a detailed plan, 3.7 can complete the task much faster.”
Show 1 more
“I use Flash model as code implementation executor, then have GPT-5.6-Sol or Opus to review the work.”
Caveats and dissent
Usage limits · 3
Some subscribers hit rate limits or quotas very quickly.
“the limits as absolutely abysmal when using 3.7 flash in antigravity”
Show 1 more
“I love 3.8 Flash, if only it weren’t unusably flaky.”
Flaky service · 2
Users report slow responses and API-unavailable errors.
“I love 3.8 Flash, if only it weren’t unusably flaky.”
“i casually get error, api not available, especially gemeni-flash”
Long, heavy tasks · 3
Said to be weaker for long-horizon work and large refactors.
“Gemini Flash is one of the best "good-enough" models.”
“3.8 flash is the best back-and-forth model for iterating imo”
Show 1 more
“Almost everything had been stubbed out by 3.8, and none of it was properly integrated into the codebase.”
Accuracy slips · 2
Some saw it claim finished work it had stubbed out or misread its own context.
“Almost everything had been stubbed out by 3.8, and none of it was properly integrated into the codebase.”
“have people had trouble with 3.6 Flash just... getting things it has seen in its context correct?”
Harness friction · 3
Commenters dislike Google's harnesses and the limits on using it in their own tools.
“Gemini Flash 3.8 is an awesome model! I use it all the time”
“By the way - I love Gemini's personality . it's phenomenal to work with”
Show 1 more
“it's fast and almost free (sufficient quota with pro account)”
Pricing changes · 2
Some worry about newer Flash versions being pricier and about announced price increases.
Often compared with
2 moved from Gemini Pro to Gemini Flash
2 moved from Gemini Flash to Gemini Pro
1 moved from Claude Sonnet to Gemini Flash
1 moved from Gemini Flash to Claude Sonnet
1 moved from Claude to Gemini Flash
1 moved from DeepSeek V4 Flash to Gemini Flash
1 moved from Gemini Flash to DeepSeek V4 Flash
Who recommends it in their own words
From the makers not counted in the ranking
“with some prompt taming it is great”
Threads where it came up
- Gemini 3.7 Flash 10 mentions
- Gemini 3.8 Flash and 3.8 Flash Cyber 9 mentions
- Gemini 4 Argon 6 mentions
- Gemini 4 Carbon is the new #1 on the Artificial Analysis Intelligence Index v5 3 mentions
- Gemini 4 Argon 3 mentions
- Ask HN: What default model do you use and why? 3 mentions
Also written as Gemini Flash, Gemini 3.8 Flash, Gemini 3.5 Flash, Gemini 3.7 Flash. Data: gemini-flash.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.
All comments 47
“Gemini flash 3.8 is an exceptional model and is the bulk of my agentic use”
“a full analysis of Gemini 3.8 Flash vs Gemini 3.5 Flash lite using agentic video understanding”
“I've gotten good mileage out of 3.8 flash while keeping in mind that it's far from perfect.”
“Gemini 2.5 flash and 3 flash were highly underrated models that performed way better than the peers”
“3.8 Flash has been my favourite model and daily driver for a little while now.”
“I love 3.8 Flash, if only it weren’t unusably flaky.”
“I use Gemini 3.8 Flash as my daily driver for most coding.”
“Gemini Flash 3.8, DeepSeek Flash, and Luna are still up there as favorites”
“Gemini 3.8 Flash has been a joy to use in comparison (and so fast!) as a daily driver.”
“Almost everything had been stubbed out by 3.8, and none of it was properly integrated into the codebase.”
“Switched to gemini-3.8-flash in same session... worked.”
“prefer Gemini 3.8 flash as a daily driver just because it's so much more pleasant (and faster!) to work with”
“It's honestly not as bad as it sounds.”
“for what amounts to a web search Gemini 3.8 flash is better than the big models”
“Gemini 3.8 Flash, which has been my benchline for "cheap and smart enough"”
“For personal projects I bounce between Sol/Terra and Gemini Flash.”
“FlashNext is also better at finding issues in generated code than Gemini 3.8 Flash.”
“google flash was good for topic research and general queries”
“I use Gemini Flash every single day without paying a dime.”
“3.8 Flash does really well for writing code as long as you give it a good design and plan to follow.”
“it's fast and almost free (sufficient quota with pro account)”
“If there's already a detailed plan, 3.7 can complete the task much faster.”
“pretty much it switched to latest Flash series as main option”
“3.8 Flash is just quite good”
“Currently I'm building my own generative modeling + aero sim package largely using Gemini and it's been working great.”
“I tested it on my own code review set with Gemini Flash.”
“gemini-3.6-flash for brainstorming problems”
“They really redeemed themselves with the 3.5 Flash series, it's great. I love how fast it is.”
“I'll have to try Gemini Flash for coding.”
“It just sends the PDF to Gemini Flash and asks it to extract semi structured data”
“3.8 flash is the best back-and-forth model for iterating imo”
“It's ridiculously fast, and generally very good with real-world knowledge.”
“I use 3.8 flash in Antigravity a lot, and thoroughly prefer it to most Pro-class models.”
“You can use Gemini 3.8 Flash and you can give him system instructions.”
“Gemini Flash 3.8 gave me the closest to good writing out of the ones I tested.”
“Gemini 3.8 flash via Antigravity desktop has been my daily driver for the last few weeks.”
“Gemini 3.8 flash and gemini 3.1 pro seem to lead across the other LLMs.”
“Gemini Flash 3.8 is an awesome model! I use it all the time”
“the only faster acessible model currently is Gemini 3.8 Flash which is around 250-280 tok/s”
“then switched to Gemini Flash for the same price inline, or half price using batch API, and the difference is night and day.”
“Flash 3.8 is rad. Easily my daily driver now.”
“I use Flash model as code implementation executor, then have GPT-5.6-Sol or Opus to review the work.”
“the limits as absolutely abysmal when using 3.7 flash in antigravity”
“Yes, 3.6 Flash is very fast.”
“Gemini Flash is one of the best "good-enough" models.”
“It’s very competent, and quite a bit cheaper than Claude.”
“i casually get error, api not available, especially gemeni-flash”