MODELS / OPENAI

GPT-4.1 nano (Fast)

GPT-4.1 nano is the fastest, most cost-effective GPT 4.1 model.

TEXTFILE-INPUTIMPLICIT-CACHINGTOOL-USEVISIONWEB-SEARCHFAST
1.0M
CONTEXT WINDOW
32.8K
MAX OUTPUT TOKENS
$0.2
INPUT PRICE / 1M TOKENS
$0.8
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/openai/gpt-4.1-nano-fast",
    "messages": [{ "role": "user", "content": "Hello!" }],
    "stream": true
  }'
SPECIFICATIONS

The full spec sheet.

Context, pricing, modalities, routing, and deployment: everything GPT-4.1 nano (Fast) supports, in one table.

MODEL ID
blackboxai/openai/gpt-4.1-nano-fast
DEVELOPED BY
OpenAI
MODEL TYPE
Text
RELEASED
Apr 14, 2025
CONTEXT WINDOW
1.0M
MAX OUTPUT TOKENS
32.8K
INPUT MODALITIES
text, image, pdf
OUTPUT MODALITIES
text
INPUT PRICE
$0.2 / 1M tokens
OUTPUT PRICE
$0.8 / 1M tokens
CACHE READ
$0.05 / 1M tokens
REASONING
Not supported
DATA RETENTION
Standard retention
DEDICATED DEPLOYMENT
Not available (closed-weight model)
SUPPORTED PARAMETERS
max_tokenstemperaturestoptoolstool_choice