Gemini 3.1 Flash Lite
Ranked 19 of 72 language models by recommenders
Fast, cheap model that people use for high-volume tasks like data extraction, translation and document questions. Common caveat: it follows instructions poorly as context or complexity grows.
Fast, cheap model that people use for high-volume tasks like data extraction, translation and document questions. Common caveat: it follows instructions poorly as context or complexity grows.
121 people gave an opinion
- recommend it
- 76
- criticize it
- 45
- approval share
- 63%
Recommended in 12 of 13 months
- November 2025: recommended
- December 2025: recommended
- January 2026: recommended
- February 2026: recommended
- March 2026: recommended
- April 2026: recommended
- May 2026: recommended
- June 2026: recommended
- July 2026: recommended
- August 2026: recommended
- September 2026: recommended
- October 2026: recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 76 people recommend itNeeds 10 or more, met.
- 1.6 recommenders for every criticNeeds 2 to 1 or better, not met.
- Recommended in 12 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Cheap for the quality
“I recently settled on 3.1 Flash Lite after testing basically everything on offer on OpenRouter, and it was not a close call - cheaper, faster, and better”
Comment from 13 May 2026 in “The US Is Winning the AI Race” “It's cheaper than 2.5 Flash, and in my experience with the free tier, quite an upgrade in terms of quality of response.”
Comment from 8 Jun 2026 in “MiMo-v2.5-Pro-UltraSpeed: 1T model with 1000 tokens per second” “Flash-Lite’s $0.25/$1.50 price finally lets us run the translation+compliance queue without ripping through tokens.”
Comment from 3 Mar 2026 in “Gemini 3.1 Flash-Lite: Built for intelligence at scale” - Comment from 23 Jul 2026 in “Alphabet's cash burn raises alarm for Big Tech as AI spending climbs”
- Comment from 2 Jan 2026 in “Show HN: A small game localization tool for indie devs (built with Gemini)”
- Comment from 10 May 2026 in “Gemini API File Search is now multimodal”
- Comment from 29 Jun 2026 in “Semgrep: GLM 5.2 beats Claude in our Cyber Benchmarks”
Very fast responses
“I'm a big fan of the Flash-Lite models. They're exceedingly fast and deliver great outputs for high volume use cases”
Comment from 21 Jul 2026 in “Gemini 3.6 Flash, 3.5 Flash-Lite, and 3.5 Flash Cyber” “it still is a beast when feeding it one or two pdf documents and asking questions about them and it's hella fast”
Comment from 30 Sep 2026 in “Gemini 4 Argon” “It also allows you to use the fast models to have these tasks done in seconds rather than minutes.”
Comment from 22 May 2026 in “Multi-Stream LLMs: new paper on parallelizing/separating prompts, thinking, I/O” - Comment from 3 Mar 2026 in “Gemini 3.1 Flash-Lite: Built for intelligence at scale”
- Comment from 23 Jul 2026 in “Alphabet's cash burn raises alarm for Big Tech as AI spending climbs”
Strong for high-volume extraction tasks
“I'm a big fan of the Flash-Lite models. They're exceedingly fast and deliver great outputs for high volume use cases”
Comment from 21 Jul 2026 in “Gemini 3.6 Flash, 3.5 Flash-Lite, and 3.5 Flash Cyber” “Flash-Lite’s $0.25/$1.50 price finally lets us run the translation+compliance queue without ripping through tokens.”
Comment from 3 Mar 2026 in “Gemini 3.1 Flash-Lite: Built for intelligence at scale” “Gemini is still my top choice within production software for typical data extraction from unstructured data.”
Comment from 17 Aug 2026 in “GPT 5.6 Sol is the best "vision" model OpenAI ever released” - Comment from 10 Aug 2026 in “Ask HN: What are you working on? (August 2026)”
- Comment from 15 Aug 2026 in “Qwen 3.8 27B is out: open weights, best local dense model yet”
Good at image and PDF tasks
“it still is a beast when feeding it one or two pdf documents and asking questions about them and it's hella fast”
Comment from 30 Sep 2026 in “Gemini 4 Argon” “currently has the best ratio for price/speed/intelligence for understanding images”
Comment from 21 Jul 2026 in “Gemini 3.6 Flash, 3.5 Flash-Lite, and 3.5 Flash Cyber” “it's the best model for semantic image segmentation in my experience”
Comment from 14 Oct 2026 in “We’re releasing Jev 1.14.0 along with experimental features for dreamers”
What people warn about
Each mark is one comment
Weak instruction following at scale
“susceptible to very bad instruction following and recall when either complexity or context size inch up”
Comment from 17 Aug 2026 in “GPT 5.6 Sol is the best "vision" model OpenAI ever released” “Gemini 2.5 Flash Lite needs a lot more steering than regular 2.5 Flash, but it is a very capable model”
Comment from 17 Dec 2025 in “Gemini 3 Flash: Frontier intelligence built for speed” “how hard it is to steer this trash model even when fed already correct information”
Comment from 3 Oct 2026 in “Gemini ending free use of Flash and Pro models” - Comment from 21 Jul 2026 in “Gemini 3.6 Flash, 3.5 Flash-Lite, and 3.5 Flash Cyber”
Price rose over earlier versions
“3.5 flash lite is even more expensive.”
Comment from 21 Jul 2026 in “Gemini 3.6 Flash, 3.5 Flash-Lite, and 3.5 Flash Cyber” “both more expensive (was $0.10/$0.40) and now either ($0.25/$1.50) or ($0.15/$0.60)”
Comment from 30 Jul 2026 in “Gemini 2.5 models are being deprecated and discontinued” “their Flash and Flash Light models are horrendously overpriced on task benchmarks”
Comment from 7 Aug 2026 in “Improving GPT-5.6 Sol in ChatGPT—and expanding access for free users” - Comment from 21 Jul 2026 in “Gemini 3.6 Flash, 3.5 Flash-Lite, and 3.5 Flash Cyber”
Odd or nonsensical output at times
“it had lots of random interruptions like when I was testing it”
Comment from 28 Jun 2026 in “Google limits Meta's use of its Gemini AI models” “It failed to make a connection between "now" and the current time, nothing to do with Google Maps.”
Comment from 3 Oct 2026 in “Gemini ending free use of Flash and Pro models” “My results were interspersed with random snippets of legible, non-gibberish English language.”
Comment from 11 Dec 2025 in “Getting a Gemini API key is an exercise in frustration” - Comment from 3 Oct 2026 in “Gemini ending free use of Flash and Pro models”
Costly at high reasoning settings
“on high was basically just burning tokens, costing like 30x more, while giving worse answers”
Comment from 29 Jun 2026 in “Semgrep: GLM 5.2 beats Claude in our Cyber Benchmarks” “on High used 1.5M reasoning tokens, and it's cost was 5x the one of running 5.3-Codex”
Comment from 4 Apr 2026 in “Google releases Gemma 4 open models” “Do not use 3.1 Flash-Lite with HIGH reasoning, it reasons for almost max output size”
Comment from 3 Mar 2026 in “Gemini 3.1 Flash-Lite: Built for intelligence at scale”
Other language models people recommend
The four most recommended other language models, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Claude Opus | 3,331 | 2,746 | 55% | 13 | 4 mo156 owners | — |
| OpenAI GPT | 1,205 | 987 | 55% | 13 | 6 mo47 owners | — |
| Claude Sonnet | 854 | 586 | 59% | 13 | 6 mo46 owners | — |
| DeepSeek V4 Flash | 828 | 223 | 79% | 8 | 1 mo24 owners | Approved |
| Gemini 3.1 Flash LiteThis page | 76 | 45 | 63% | 12 | — | — |
What people said
40 of the 152 comments that mention it, newest first. Each links to the original comment.
“it's the best model for semantic image segmentation in my experience”
“Flash-lite is pretty capable and getting that entirely for free is not a bad deal at all.”
“it would just spit out nonsense BS saying that it can't turn the lights on or off”
“It failed to make a connection between "now" and the current time, nothing to do with Google Maps.”
“how hard it is to steer this trash model even when fed already correct information”
“it still is a beast when feeding it one or two pdf documents and asking questions about them and it's hella fast”
“Gemini 2.5 Flash-Lite was enough for me to set older Dishonored: DotO builds free of Denuvo”
“susceptible to very bad instruction following and recall when either complexity or context size inch up”
“Gemini is still my top choice within production software for typical data extraction from unstructured data.”
“So in production we have been using Gemini Flash Lite as primary”
“1000s of free LLM calls to flash-lite models, which are more than upto this task”
“their Flash and Flash Light models are horrendously overpriced on task benchmarks”
“both more expensive (was $0.10/$0.40) and now either ($0.25/$1.50) or ($0.15/$0.60)”
“3.5 flash lite is super fast, cheap and token efficient and accepts any kind of input”
“currently has the best ratio for price/speed/intelligence for understanding images”
“It's not following instructions and is not producing the correct tool calls.”
“gemini-3.1-flash-lite is ~20% higher accuracy than the next best model of comparable cost”
“I'm a big fan of the Flash-Lite models. They're exceedingly fast and deliver great outputs for high volume use cases”
“has been my go to for cheap document processing at scale”
“gemini-3.5-flash-lite: $0.30 input / $2.50 output (a 6.25x increase over 2.5!)”
“The replacement 3.1 flash lite is a lot more expensive, but now also has a sunset date.”
“3.5 flash lite is even more expensive.”
“agentic models of this size are a huge value-add for 90% of knowledge work agent tasks”
“That's a great result if you care about cost for performance.”
“on high was basically just burning tokens, costing like 30x more, while giving worse answers”
“it had lots of random interruptions like when I was testing it”
“Then goes off and lists the things you'll need which at a cursory glance seems like good starting points.”
“It's cheaper than 2.5 Flash, and in my experience with the free tier, quite an upgrade in terms of quality of response.”
“It also allows you to use the fast models to have these tasks done in seconds rather than minutes.”
“I recently settled on 3.1 Flash Lite after testing basically everything on offer on OpenRouter, and it was not a close call - cheaper, faster, and better”
“the Gemini Flash and Flash Lite models are super capable for the price”
“on High used 1.5M reasoning tokens, and it's cost was 5x the one of running 5.3-Codex”
“Gemini 2.5 Flash Lite is also good at this, but not noticeably better, and it costs more.”
“Do not use 3.1 Flash-Lite with HIGH reasoning, it reasons for almost max output size”
“Flash-Lite’s $0.25/$1.50 price finally lets us run the translation+compliance queue without ripping through tokens.”
“If 3.1-flash-lite can do the job, this solves basically all latency issues for agentic workflows.”
“2.5-flash and therefore 2.5-flash-lite failed some of my agentic workflows.”
“translating ~10k lines comes out to around $0.60 using Gemini Flash Lite”
“Gemini 2.5 Flash Lite needs a lot more steering than regular 2.5 Flash, but it is a very capable model”
“My results were interspersed with random snippets of legible, non-gibberish English language.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.