Google: Gemini 3.1 Pro Preview

Google Gemini

gemini/gemini-3.1-pro-preview

Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...

Context

1.048576M

Input /1M

$2.00

Output /1M

$12.00

Latency (TTFT)

2,989ms

Pricing

Per 1M tokens, in USD

Input$2.00

Output$12.00

Cache read$0.20

Cache write (5m)$0.375

Specs

audio infile inimage intext invideo intext out

TokenizerGemini

Max output tokens65,536

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_p

Where it ranks on price

Against 157 routable models

Input$2.00

Cheaper than 17% of routable models

Output$12.00

Cheaper than 14% of routable models

Benchmarks

Intelligence30.4

Coding68.8

Agentic10.3

Composite scores (0–100) from Artificial Analysis, via OpenRouter's model catalog.

Call this model

Swap in your Mizan key — the request/response bodies are OpenAI chat-completion shaped.

cURL

curl https://api.app-mizan.com/v1/chat/completions \
  -H "Authorization: Bearer mizan_rt_..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini/gemini-3.1-pro-preview",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'

Models

Google: Gemini 3.1 Pro Preview

Google Gemini

gemini/gemini-3.1-pro-preview

Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...

Context

1.048576M

Input /1M

$2.00

Output /1M

$12.00

Latency (TTFT)

2,989ms

Pricing

Per 1M tokens, in USD

Input$2.00

Output$12.00

Cache read$0.20

Cache write (5m)$0.375

Specs

audio infile inimage intext invideo intext out

TokenizerGemini

Max output tokens65,536

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_p

Where it ranks on price

Against 157 routable models

Input$2.00

Cheaper than 17% of routable models

Output$12.00

Cheaper than 14% of routable models

Benchmarks

Intelligence30.4

Coding68.8

Agentic10.3

Composite scores (0–100) from Artificial Analysis, via OpenRouter's model catalog.

Call this model

Swap in your Mizan key — the request/response bodies are OpenAI chat-completion shaped.

cURL

curl https://api.app-mizan.com/v1/chat/completions \
  -H "Authorization: Bearer mizan_rt_..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini/gemini-3.1-pro-preview",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'