uttapen

Gemini 3.1 Flash Lite Preview vs Gemini 3 Flash Preview (batch)

Both sit behind the same key and the same code on uttapen — the only thing that changes is the model string, so you can run each of them against your own workload without touching anything else.

FeatureGemini 3.1 Flash Lite PreviewGemini 3 Flash Preview (batch)
ProviderGoogleGoogle
Model idgoogle/gemini-3.1-flash-lite-previewgoogle/gemini-3-flash-preview:batch
Context1,048,576 tokens1,048,576 tokens
Max output65,536 tokens65,536 tokens
Input / 1M tokens72,531 toman72,531 toman
Output / 1M tokens435,188 toman435,188 toman
≈ one 1,000-word request660 toman660 toman
Input caching7,253 toman / 1MNo
Image inputYesYes
File inputYesYes
Tool callingYesYes
JSON outputYesYes
Reasoning modeYesYes

Which one for what?

Gemini 3.1 Flash Lite Preview

  • Multi-step problems, maths, and tracking down a bug
  • Whole documents or a codebase in a single request
  • Reading screenshots, invoices, and scanned forms
  • Agents that call your own APIs and database
660 toman per 1,000 words · Model page

Gemini 3 Flash Preview (batch)

  • Multi-step problems, maths, and tracking down a bug
  • Whole documents or a codebase in a single request
  • Reading screenshots, invoices, and scanned forms
  • Agents that call your own APIs and database
660 toman per 1,000 words · Model page

Run both with the same code

Swap the model value between the two ids and send the same request twice; what each answer cost comes back in the X-Uttapen-Cost-Toman header.

curl https://api.uttapen.ir/v1/chat/completions \
  -H "Authorization: Bearer sk-up-…" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemini-3.1-flash-lite-preview",
    "messages": [{"role": "user", "content": "Introduce yourself in one sentence."}],
    "stream": true
  }'

model = "google/gemini-3-flash-preview:batch"

More comparisons: all pairs · model rankings · full catalogue

base_url = https://api.uttapen.ir/v1