Standard Compute
Model Comparison 2026

Gemini 3.1 Flash Lite vs Gemini 3.1 Pro

Gemini 3.1 Flash Lite
Google · Budget · Proprietary
$0.63/1M · 1.0M ctx
Gemini 3.1 Pro
Google · Frontier · Proprietary
$5.00/1M · 1.0M ctx

Community Vote

Pick a winner in each dimension — change your vote anytime.

Output Quality
Correctness and depth of what it produces
Agentic Ability
Tool calls, instruction-following, and multi-step tasks
Speed
Tokens per second and time-to-first-token
Value for $
How much capability you get per dollar
Reliability
Consistent results — fewer refusals, loops, and format breaks

Specs & Pricing, Side by Side

Spec
Flash Lite
Gemini 3.1 Pro
Maker
Google
Google
Blended price / 1M
$0.63
$5.00
Input / output
$0.25 in · $1.50 out / 1M tokens
$2.00 in · $12 out / 1M tokens
Context window
1.0M
1.0M
Open weights
No
No
Tool use
Yes
Yes
Reasoning
Yes
Yes
Output Quality
7.4
9.2
Agentic Ability
7.2
9.0
Speed
9.6
7.5
Value for $
8.6
8.1
Reliability
8.5
8.8

Pricing and capabilities synced from the OpenRouter catalogue. Scores are editorial (0–10).

Verdict: Flash Lite or Gemini 3.1 Pro?

Updated 2026-08-02

Choose Gemini 3.1 Flash Lite if you want cheap, high-volume steps that still need long context. Choose Gemini 3.1 Pro if you want huge-context and multimodal work, and Gemini CLI users.

In our editorial scoring, Gemini 3.1 Pro leads in 3 of five dimensions (output quality, agentic ability and reliability), while Gemini 3.1 Flash Lite leads in 2. On price, Gemini 3.1 Flash Lite runs about $0.63 per 1M tokens (blended) and is proprietary; Gemini 3.1 Pro is about $5.00 and proprietary.

Where Flash Lite falls short
  • Lowest quality of the Gemini line
  • Struggles on complex multi-step tasks
Full Flash Lite breakdown →
Where Gemini 3.1 Pro falls short
  • Tool use a touch behind Claude/GPT on some agents
  • Preview-tier stability varies
Full Gemini 3.1 Pro breakdown →

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