MODELS / SAKANA

Fugu Ultra

Fugu Ultra coordinates a deeper pool of expert agents to maximize answer quality on hard, high-stakes problems. Fugu Ultra focuses on maximizing performance, for a higher cost. It routes between one to three agents, depending on the problem.

TEXTREASONINGVISIONTOOL-USEREASONING
1M
CONTEXT WINDOW
-
MAX OUTPUT TOKENS
$5
INPUT PRICE / 1M TOKENS
$30
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/sakana/fugu-ultra",
    "messages": [{ "role": "user", "content": "Hello!" }],
    "stream": true
  }'
SPECIFICATIONS

The full spec sheet.

Context, pricing, modalities, routing, and deployment: everything Fugu Ultra supports, in one table.

MODEL ID
blackboxai/sakana/fugu-ultra
DEVELOPED BY
Sakana
MODEL TYPE
Text
RELEASED
Jun 21, 2026
CONTEXT WINDOW
1M
MAX OUTPUT TOKENS
-
INPUT MODALITIES
text, image
OUTPUT MODALITIES
text
INPUT PRICE
$5 / 1M tokens
OUTPUT PRICE
$30 / 1M tokens
INPUT PRICE (>200K)
$10 / 1M tokens
CACHE READ
$0.5 / 1M tokens
REASONING
Supported
DATA RETENTION
Standard retention
DEDICATED DEPLOYMENT
Not available (closed-weight model)
SUPPORTED PARAMETERS
max_tokenstemperaturestoptoolstool_choicereasoninginclude_reasoning