MODELS / MOONSHOT

Kimi K3.1 Pro

Kimi K3.1 Pro is a frontier model from Moonshot AI for complex reasoning, coding, and agentic workflows, with support for vision, tool use, structured outputs, and long-context tasks.

TEXTREASONINGIMPLICIT-CACHINGSTRUCTURED-OUTPUTTOOL-USEVISIONOPEN-WEIGHTS
1.0M
CONTEXT WINDOW
-
MAX OUTPUT TOKENS
$2
INPUT PRICE / 1M TOKENS
$10
OUTPUT PRICE / 1M TOKENS
QUICKSTART
PROTOCOL:
OPENAI COMPATIBLE
STREAMING:
SUPPORTED

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/moonshotai/kimi-k3.1-pro",
    "messages": [{ "role": "user", "content": "Hello!" }],
    "stream": true
  }'
SPECIFICATIONS
CONTEXT:
1.0M
PROVIDER:
MOONSHOT
TYPE:
TEXT

The full spec sheet.

Context, pricing, modalities, routing, and deployment: everything Kimi K3.1 Pro supports, in one table.

MODEL ID
blackboxai/moonshotai/kimi-k3.1-pro
DEVELOPED BY
Moonshot
MODEL TYPE
Text
RELEASED
Oct 23, 2026
CONTEXT WINDOW
1.0M
MAX OUTPUT TOKENS
-
INPUT MODALITIES
text, image
OUTPUT MODALITIES
text
INPUT PRICE
$2 / 1M tokens
OUTPUT PRICE
$10 / 1M tokens
CACHE READ
$0.2 / 1M tokens
REASONING
Supported
DATA RETENTION
Standard retention
DEDICATED DEPLOYMENT
Enterprise · single-tenant
SUPPORTED PARAMETERS
max_tokenstemperaturestoptoolstool_choicereasoninginclude_reasoningresponse_formatstructured_outputs