uttapen

Aion-3.0 vs Gemini 3.1 Pro 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. On cost, Gemini 3.1 Pro Preview (batch) comes out about 1.3× cheaper.

FeatureAion-3.0Gemini 3.1 Pro Preview (batch)
ProviderAion LabsGoogle
Model idaion-labs/aion-3.0google/gemini-3.1-pro-preview:batch
Context131,072 tokens1,048,576 tokens
Max output32,768 tokens65,536 tokens
Input / 1M tokens870,375 toman290,125 toman
Output / 1M tokens1,740,750 toman1,740,750 toman
≈ one 1,000-word request3,394 toman2,640 toman
Input caching217,594 toman / 1MNo
Image inputNoYes
File inputNoYes
Tool callingYesYes
JSON outputYesYes
Reasoning modeYesYes

Which one for what?

Aion-3.0

  • Multi-step problems, maths, and tracking down a bug
  • Agents that call your own APIs and database
3,394 toman per 1,000 words · Model page

Gemini 3.1 Pro 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
2,640 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": "aion-labs/aion-3.0",
    "messages": [{"role": "user", "content": "Introduce yourself in one sentence."}],
    "stream": true
  }'

model = "google/gemini-3.1-pro-preview:batch"

More comparisons: all pairs · model rankings · full catalogue

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