MODELS / GOOGLE

Gemini 3.1 Pro Preview

This model improves upon Gemini 2.5 Pro and is catered towards challenging tasks, especially those involving complex reasoning or agentic workflows. Improvements highlighted include use cases for coding, multi-step function calling, planning, reasoning, deep knowledge tasks,…

TEXTREASONINGFILE-INPUTTOOL-USEREASONINGVISIONWEB-SEARCHIMPLICIT-CACHING
1M
CONTEXT WINDOW
64K
MAX OUTPUT TOKENS
$2
INPUT PRICE / 1M TOKENS
$12
OUTPUT PRICE / 1M TOKENS
QUICKSTART

Call it in one request.

OpenAI-compatible: change the base URL, and the setup is complete.

curl https://enterprise.blackbox.ai/v1/chat/completions \
  -H "Authorization: Bearer $BLACKBOX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "blackboxai/google/gemini-3.1-pro-preview",
    "messages": [{ "role": "user", "content": "Hello!" }],
    "stream": true
  }'
SPECIFICATIONS

The full spec sheet.

Context, pricing, modalities, routing, and deployment: everything Gemini 3.1 Pro Preview supports, in one table.

MODEL ID
blackboxai/google/gemini-3.1-pro-preview
DEVELOPED BY
Google
MODEL TYPE
Text
RELEASED
Feb 19, 2026
CONTEXT WINDOW
1M
MAX OUTPUT TOKENS
64K
INPUT MODALITIES
text, image, pdf
OUTPUT MODALITIES
text
INPUT PRICE
$2 / 1M tokens
OUTPUT PRICE
$12 / 1M tokens
INPUT PRICE (>200K)
$4 / 1M tokens
CACHE READ
$0.2 / 1M tokens
REASONING
Supported
DATA RETENTION
Standard retention
DEDICATED DEPLOYMENT
Not available (closed-weight model)
SUPPORTED PARAMETERS
max_tokenstemperaturestoptoolstool_choicereasoninginclude_reasoning