MODELS / GOOGLE

Gemini 3.8 Flash

Gemini 3.8 Flash is the high-efficiency, cost-effective powerhouse of the Gemini 3 family. It delivers Pro-level agentic capabilities, major leaps in code generation and terminal execution. 3.8 Flash serves as the primary agentic workhorse in the Gemini 3 family, bridging the…

TEXTREASONINGREASONINGFILE-INPUTVISIONTOOL-USEWEB-SEARCHIMPLICIT-CACHINGVIDEO-INPUT
1M
CONTEXT WINDOW
65.5K
MAX OUTPUT TOKENS
$0.75
INPUT PRICE / 1M TOKENS
$3.75
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-3.8-flash",
    "messages": [{ "role": "user", "content": "Hello!" }],
    "stream": true
  }'
SPECIFICATIONS

The full spec sheet.

Context, pricing, modalities, routing, and deployment: everything Gemini 3.8 Flash supports, in one table.

MODEL ID
blackboxai/google/gemini-3.8-flash
DEVELOPED BY
Google
MODEL TYPE
Text
RELEASED
Sep 2, 2026
CONTEXT WINDOW
1M
MAX OUTPUT TOKENS
65.5K
INPUT MODALITIES
text, image, pdf, video
OUTPUT MODALITIES
text
INPUT PRICE
$0.75 / 1M tokens
OUTPUT PRICE
$3.75 / 1M tokens
CACHE READ
$0.075 / 1M tokens
REASONING
Supported
DATA RETENTION
Standard retention
DEDICATED DEPLOYMENT
Not available (closed-weight model)
SUPPORTED PARAMETERS
max_tokenstemperaturestoptoolstool_choicereasoninginclude_reasoning