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Gemini 3.5 Flash vs Gemini 3.1 Flash Lite

Gemini's two speed tiers, Flash against the even lighter Flash-Lite.

Figures as of , read live from the model registry Zeplik bills against.

What the numbers say

Derived from the live registry Zeplik routes and bills against. Credits: 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin.

Side by side

Gemini 3.5 Flash

Google

Gemini 3.5 Flash is Google's high-efficiency multimodal model, bringing near-Pro level coding and reasoning at Flash-tier cost and speed.

Provider
Google
Context window
1.0M tokens
Input price
18.0 credits / 1M tokens ($1.50 raw)
Output price
108 credits / 1M tokens ($9.00 raw)
Vision (image input)
Yes
Tool calling
Yes
Extended reasoning
No

Best for

  • High-volume everyday tasks where speed and cost matter: summaries, drafts, quick questions
  • Very long documents and codebases: a 1.0M-token window fits entire books or repositories in one conversation
  • Working with images: screenshots, charts, photos and scanned documents alongside text
  • Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

Gemini 3.1 Flash Lite

Google

Gemini 3.1 Flash Lite is Google’s GA high-efficiency multimodal model optimized for low-latency, high-volume workloads.

Provider
Google
Context window
1.0M tokens
Input price
3.0 credits / 1M tokens ($0.25 raw)
Output price
18.0 credits / 1M tokens ($1.50 raw)
Vision (image input)
Yes
Tool calling
Yes
Extended reasoning
No

Best for

  • High-volume everyday tasks where speed and cost matter: summaries, drafts, quick questions
  • Very long documents and codebases: a 1.0M-token window fits entire books or repositories in one conversation
  • Working with images: screenshots, charts, photos and scanned documents alongside text
  • Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

Try both on Zeplik

The honest answer to most model debates is to run your own prompt on both. Zeplik puts Gemini 3.5 Flash and Gemini 3.1 Flash Lite in the same chat, so you can switch mid-conversation and compare answers on the work you actually do.

Pick a model and ask. Your prompt opens in the Zeplik app with that model selected.

Model to ask

Frequently asked questions

What is the difference between Gemini 3.5 Flash and Gemini 3.1 Flash Lite?
Gemini 3.1 Flash Lite is about 6.0x cheaper on output tokens (18.0 vs 108 credits per 1M). Both take the same 1.0M-token context window. Gemini 3.5 Flash is the newer release (May 2026 vs May 2026).
Is Gemini 3.5 Flash or Gemini 3.1 Flash Lite cheaper?
Gemini 3.1 Flash Lite is cheaper: 18.0 credits per million output tokens against 108. 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin.
Which has the larger context window, Gemini 3.5 Flash or Gemini 3.1 Flash Lite?
Neither: both take 1.0M tokens.
Can I use both Gemini 3.5 Flash and Gemini 3.1 Flash Lite on Zeplik?
Yes. Zeplik is a multi-model chat, so both sit behind one account and you can switch between them mid-conversation to compare answers on your own prompt.
Do Gemini 3.5 Flash and Gemini 3.1 Flash Lite need a paid plan?
One of the two is open to free accounts; the other needs a paid plan (Plus or above).

Related comparisons

Gemini 3.5 Flash detailsGemini 3.1 Flash Lite detailsAll comparisons

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